Now even more application possibilities In all facets of semiconductor protection

Transcription

1 Semiconductor Protection Fuses sitor ENGINEERING s

2 Now even more application possibilities In all facets of semiconductor protection For decades now, SITOR semiconductor protection fuses have been reliably protecting converters, rectifiers, UPS systems and many more devices against short-circuit as well as cables against overload. In order to fulfill market requirements, we have extended our program by ultra-fast cylindrical fuses. This means that now more applications can be reliable protected using the well-proven SITOR product range. The advantages of SITOR semiconductor protection fuses at a glance Extremely fast interruption of currents Unique combination of semiconductor protection and cable protection minimizes costs, the space require and the installation costs DIN and special designs for almost all applications Rated fuses currents from to 50 High cyclic load capacity ensures ageing-free operation vailable with characteristics, gr and gs Ultra-fast cylindrical fuses with a wide range of accessories are now available They can be quickly supplied thorugh our central warehouse in mberg

3 SITOR Semiconductor Protection Fuses pplications and Standards Ordering and Engineering Data Selection and Engineering Documents Characteristics and Dimension Drawings Technical Description and Terminology Order No.: ZX05-0NC00-B Edition 05/00

4

5 pplications and Standards Features Possible arrangements Standards

6 pplications Features SITOR fuse links protect converters against short-circuit. The power semiconductors used in these devices (diodes, thyristors, GTOs and others) require fast-switching elements to protect them as a result of their low thermal capacity. SITOR fuse links are admirably suited for this type of application (fuse links for semiconductor protection with super-fast characteristics). The following fault situations involving short-circuits can occur: Internal short-circuit: defective semiconductor component causes a short-circuit within the converter External short-circuit: fault in the load causes a short-circuit at the output of the converter Inverter commutation faults: If the converter control fails when in the inverter mode (commutation faults), then the converter circuit forms a short-circuit connection between the DC voltage and C voltage supply. Fuse links can be arranged in various ways within the converter circuit. differentiation is made between the phase fuses in the three-phase feeder cables as well as, if required, DC current fuses and branch fuses in the branches of the converter circuit (diagrams 5- to 5-). For center-tap circuit configurations, fuse links can only be located in the three-phase feeder cables as phase fuses. When using SITOR fuse links, utilization Category, the overload protection of the converters up to approx. 50% of the rated current is handled using conventional protective devices (e.g. thermally delayed overload relays). For closed-loop converters, overload protection is provided by the current limiting (exception: general-purpose fuses). NE...-0 SITOR fuse links, utilization Category gs are, in addition to providing semiconductor protection, also designed for overload and short-circuit protection for cables, conductors and busbars. ll of the other double function fuses belonging to the SITOR series have gr characteristics. Overload protection is guaranteed if the rated current of the NE..-0 SITOR fuse link is selected corresponding to I n I z (DIN VDE 000 Part 0). The rules as laid-down in DIN VDE 000 Part 0 must be applied when dimensioning the fuse links to provide short-circuit protection for cables, conductors and busbars.

7 pplications Possible arrangements D9-505 D9-508 ( ) ( ) 5- Six-pulse bridge circuit B with branch fuses 5- Six-pulse bridge circuit B with phase fuses and DC fuses (reversing connection) 5- Six-pulse bridge circuit B with phase fuses and DC fuses (converter circuit) D9-509 D ( ) ( ) D Six-pulse bridge circuit B with branch fuses 5-5 Six-pulse bridge circuit B with branch fuses (reversing connection) D Three-phase bidirectional circuit W with phase fuses with branch fuses 5

8 Important Information Standards SITOR fuse links comply with the following Standards and regulations: DIN VDE 0, Part 0 IEC 0 9- When appropriately noted in Sections and Ordering and engineering data and Characteristics and dimension drawings, SITOR fuse links also fulfill the following Standards and regulations: IEC VDE 0/0 (for insertion in l.v.h.b.c. fuse bases according to VDE 0/0 as well as in fused-switch disconnectors and disconnectors with fuses) u The following Sitor fuse links and l.v.h.b.c. fuse bases are u recognized: Series NC 0.. NC.. NC.. NE... NE.. NE.. NE.. NE NE Guide number JFHR File number E757 NC.. JDDZ E NC 08-. NC 09. NC 9. NC 9. NH 00 NH 0 NH 0 NH 0 NH 0 NC 5- NC 58- IZLT JFHR being processed E00 E77 being processed IEC VDE 0/0 (for bolting to busbars) SITOR fuse links, Sizes to with an inside caliper of 0 mm can also be inserted in l.v.h.b.c. fuse bases according to IEC as well as in fused switch disconnectors and switch disconnectors with fuses. ll of the SITOR fuse links with rated voltages V n 000 V have the CE marking in compliance with the Low-Voltage Directive 7//EEC. The CE marking confirms that the products are in compliance with the requirements as laid down in the Directive. Environmentally-friendly recycling In 995, seven German manufacturers of l.v.h.b.c./h.v.h.b.c. fuse links founded a non-profit association. NH l.v.h.b.c./ h.v.h.b.c. Recycling HH The objective is to practically and sensibly recycle fuse links and to define an acceptable disposal concept which fulfills all of the requirements of today's environmental protection legislation. The used fused links are collected, sorted and then recycled without the packaging; materials which have been melted and recovered are then recycled. ccording to the rules and regulations of the association, excess funds from the recycling process are donated to a university to promote research in the area of fuse links. More detailed information is available under:

9 Liability exclusion The products described here were developed as part of a complete system or machine to assume safety-related functions. Generally, a complete safety-related system includes sensors, evaluation units, signaling devices and concepts for safe shutdown. It is the responsibility of the manufacturer of a plant or machine to ensure that his complete plant or machine functions correctly. Siemens G, its regional offices and associated companies (known in the following as "Siemens") are able to guarantee all of the properties and characteristics of a complete plant or machine which Siemens itself did not design. Siemens does not accept any liability for the recommendations which are either provided or implicitly provided in the following document. The information in this document does not represent a new guarantee, warranty or liability claims which extend beyond Siemens general conditions of supply. Caution Only fully authorized and trained personnel may install and use fuses. 7

10 8

11 Ordering and Engineering Data SITOR fuse links SITOR fuse links for special applications ccessories for l.v.h.b.c fuses ccessories for cylindrical fuses 9

12 Ordering and Engineering Data. SITOR fuse links Order No. Weight kg Rated voltage Rated current Clearing V n I t value Table 0- NC ) NC 5 ) NC 7 ) NC 8 ) NC ) NC ) NC - NC 5- NC 7- NC 8- NC - NC - NC8 ) NC8 5 ) NC8 7 ) NC8 ) NC8 ) NC8 - NC8 5- NC8 7- NC8 - NC8 - NC8 - NE ) NE ) NE ) NE 5 ) NE 7 ) NE 0-0B ) NE ) NE -0B ) NE ) C V DC V I n I t at.0 x V n s ) Envelope dimension and pullers correspond to IEC 09--; however, contact blades are slotted according to IEC 09-- ) u recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards ) Special version with longitudinal slots (not shown in the diagram) 0

13 Pre-arcing I t value Power loss Utilization category Cyclic load factor WL Size according to IEC/EN or VDE 0/0 (or DIN 0) Inside caliper according to IEC/EN or VDE 0/0 (or DIN 5) Characteristics and dimension drawings s W mm Section gr gr gr gr gr gr gr gr gr gr gr gr gr gr gr gr gr gr ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )

14 Order No. Weight kg Rated voltage Rated current Clearing V n I t value C V DC V I n I t at.0 x V n s NE -0B ) NE ) NE -0B ) NE 5 ) NE ) NE 7-8 ) NE 8-8 ) NE 0-8 ) NE NE 0 NE NE NE NE 5 NE 5- ) NE NE 7 NE NE 0 ) NE 0 ) NE 7 ) NE 8 ) NE 0 ) NE ) NE ) NE ) NE 7-0B NE 0-0B NE -0B NE -0B NE Table - ) Envelope dimension and pullers correspond to IEC 09--; however, contact blades are slotted according to IEC 09-- ) u recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards ) M ) Diagram, refer to Section., NE.., NE9..

15 Pre-arcing I t value Power loss Utilization category Cyclic load factor WL Size according to IEC/EN or VDE 0/0 (or DIN 0) Inside caliper according to IEC/EN or VDE 0/0 (or DIN 5) Characteristics and dimension drawings s W mm Section gr gr gr ) ) ) ) ) ) ) ) ) ) ) ) ) )

16 Order No. Weight kg Rated voltage Rated current Clearing V n I t value C V DC V I n I t at.0 x V n s NE5 NE5 NE5 0 NE5 NE5 NE NE5 7 NE5 NE NE 8-0 ) NE 8-0 ) NE 85-0 ) NE 80-0 ) NE 80-0 ) NE 87-0 ) NE 88-0 ) NE 80-0 ) NE 0-0 ) NE 0-0 ) NE 0- ) Table - NE -0 ) NE 5-0 ) NE 7-0 ) NE 0-0 ) NE - ) NE 5- ) NE 7- ) NE 0- ) ) u recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards

17 Pre-arcing I t value Power loss Utilization category Cyclic load factor WL Size according to IEC/EN or VDE 0/0 (or DIN 0) Inside caliper according to IEC/EN or VDE 0/0 (or DIN 5) Characteristics and dimension drawings s W mm Section gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs gr gr/gs gr/gs gr/gs gr/gs gr gr gr gr

18 Order No. Weight kg Rated voltage Rated current Clearing V n I t value C V DC V I n I t at.0 x V n s NE -0 ) NE -0 ) NE -0 ) NE -0 ) NE - ) NE - ) NE - ) NE 5-0 ) NE -0 ) NE 7-0 ) NE 8-0 ) NE 7- ) NE 8- ) NE 5- ) NE - ) NE 7- ) NE 7- ) NE 8- ) NE 8- ) NE7 5 NE7 7 NE7 NE7 NE7 NE7 - NE7 8- NE7 NE7 - NE NE9 - NE9 - NE Table - ) M ) u recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards

19 Pre-arcing I t value Power loss Utilization category Cyclic load factor WL Size according to IEC/EN or VDE 0/0 (or DIN 0) Inside caliper according to IEC/EN or VDE 0/0 (or DIN 5) Characteristics and dimension drawings s W mm Section gr/gs gr/gs gr/gs gr/gs gr gr gr gr/gs gr/gs gr/gs gr/gs gr gr gr gr gr gr gr gr ) 0 ) 0 0 ) 0 ) 0 ) 0 ) 0 )

20 Order No. Weight kg Rated voltage Rated current Clearing V n I t value C V DC V I n I t at.0 x V n s NE8 05- ) NE8 00- ) NE8 07- ) NE8 08- ) NE8 00- ) NE8 0- ) NE8 0- ) NE8 0- ) NE8 7- NE8 75- NE8 70- NE8 70- NE8 77- NE8 78- NE8 70- NE8 7- NE8 7- NE8 7- NE8 75- NE8 77- NE ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) NC 00 NC 00 NC 008 NC 00 NC 0 NC 0 NC 00 NC 05 NC NC 0 NC Table 8-5 ) u recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards ) CLSS CC 8

21 Pre-arcing I t value Power loss Utilization category Cyclic load factor WL Size according to IEC/EN or VDE 0/0 (or DIN 0) Inside caliper according to IEC/EN or VDE 0/0 (or DIN 5) Characteristics and dimension drawings s W mm Section gr gr gr gr gr gr gr gr gr ) ) x 8 0 x 8 0 x 8 0 x 8 0 x 8 0 x 8 0 x 8 0 x 8 0 x 8 0 x 8 0 x

22 Order No. Weight kg Rated voltage Rated current Clearing V n I t value C V DC V I n I t at.0 x V n s NC 0 NC 0 NC 0 NC 0 NC 05 NC 0 NC 0 NC 5 NC 0 NC 5 NC 0 NC NC 0 NC ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) NC 50 NC 50 NC Table 0- NC 0 NC 5 NC NC 0 NC 50 NC NC 80 NC ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) 700 ) ) u Recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards

23 Pre-arcing I t value Power loss Utilization category Cyclic load factor WL Size according to IEC/EN or VDE 0/0 (or DIN 0) Inside caliper according to IEC/EN or VDE 0/0 (or DIN 5) Characteristics and dimension drawings s W mm Section gg gg gg x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 x x 58 x 58 x 58 x 58 x 58 x 58 x 58 x

24 . SITOR fuse links for special applications Order No. Weight kg Rated voltage Rated current Clearing V n I t value C V DC V I n I t at.0 x V n s NC5 5 ) NC5 88 ) NC5 80 ) NC5 8 ) NC7 7- ) NC7 - ) NE 55-5 ) 0.7 NE 55-5 ) NE 7-5 ) NE -5 ) NE -5 ) Table -7 ) For rectifiers in electrolysis systems (these are screwed onto water-cooled busbars) ) For traction feeder rectifiers ) For SITOR thyristor sets QG0 ) For SITOR thyristor sets QG

25 Pre-arcing I t value Power loss Utilization category Cyclic load factor WL Size according to IEC/EN or VDE 0/0 (or DIN 0) Inside caliper according to IEC/EN or VDE 0/0 (or DIN 5) Characteristics and dimension drawings s W mm Section gr

26 Order No. Weight kg Rated voltage Rated current Clearing V n I t value C V DC V I n I t at.0 x V n s NE 7-B ) NE 0-B ) NE -B ) NE -B ) NE 7- ) NE 7 ) NE ) NE9 0- ) NE9 50 ) NE 7-7 ).0 NE ) Table -8 ) For SITOR thyristor sets QG ) For air-cooled rectifiers in electrolysis systems ) For rectifiers in electrolysis systems (these are screwed onto water-cooled busbars)

27 Pre-arcing I t value Power loss Utilization category Cyclic load factor WL Size according to IEC/EN or VDE 0/0 (or DIN 0) Inside caliper according to IEC/EN or VDE 0/0 (or DIN 5) Characteristics and dimension drawings s W mm Section gr gr

28 . ccessories for l.v.h.b.c fuses Permissible loading and required connection cross-sections when used in l.v.h.b.c fuse bases and switch disconnectors SITOR fuse link Order No. NC /- NC 5/- NC 7/- NC 8/- NC /- NC /- NC8 /- NC8 5/- NC8 7/- NC8 /- NC8 /- Table -9 Rated current I n Required cross-section of cables/busbars l.v.h.b.c. fuse base mm Cu Order No x 50 NH 0 ) ) Suitable puller Fuse switch disconnector max. current Order No. Order No max. current NX 0 NP Switch disconnector with fuses Order No. max. current KL ) When maintaining pollution degree according to DIN VDE 00 Part 00, the rated insulation voltage of KL, KM and NP switch disconnectors (designed for degree of pollution ) is 000 V ) The maximum currents are valid for natural air cooling. With forced cooling v m/s the fuses can be used with rated current I n. ) u recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards

29 Permissible loading and required connection cross-sections when used in l.v.h.b.c fuse bases and switch disconnectors SITOR fuse link Order No. NE 8-0 NE 8-0 NE 85-0 NE 80-0 NE 80-0 NE 87-0 NE 88-0 Rated current I n Required cross-section of cables/busbars l.v.h.b.c. fuse base mm Cu Order No NH 00 ) / NH 00 Suitable puller Fuse switch disconnector max. current Order No. Order No NX 0 NP 0/ NP5 0 max. current Switch disconnector with fuses Order No. KL50 0/ KM50 0 NE KL5 0/ KM5 0 NE 0-0 NE 0-0 NE -0 NE 5-0 NE 7-0 NE 0-0 NE -0 NE -0 NE -0 NE -0 NE 5-0 NE -0 NE 7-0 NE 8-0 NE 7- NE x 70 x 95 x 95 x 0 x 0 x 50 x 85 x (50 x 5) x (50 x 5) x (50 x 5) x (50 x 5) NH 0 ) / NH NH 0 ) NH 0 ) NH 0 NE NH 00/ NH 00 NE - NE 5- NE 7- NE 0- NE - Table x 70 x 95 NH 0/ NH NP 0/ NP5 0 NP / NP NP NP NP5 NP5 5 NP 0/ NP NH ) u recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards NP / NP KL55 0/ KM55 0 KL57 0/ KM57 0 5/5 KL5/ KM5 0 90/00 5/50 NP max. current KL KL KL55 KM55 KL57/ KM

30 Permissible loading and required connection cross-sections when used in l.v.h.b.c fuse bases and switch disconnectors SITOR fuse link Order No. NE - NE - NE 5- NE - NE 7- NE 7- NE 8- NE 8- NE8 05- NE8 00- NE8 07- NE8 08- NE8 00- NE8 0- NE8 0- NE8 0- NE 7-0B NE 0-0B NE -0B NE -0B Rated current I n Required cross-section of cables/busbars l.v.h.b.c. fuse base mm Cu Order No x 0 x 0 x 50 x 85 x (0 x 5) x (0 x 5) x (50 x 5) x (0 x 8) x 8 0 x 8 NH NH 00 ) / NH 00 Suitable puller Fuse switch disconnector max. current Order No. Order No NH 0 ) 0 00 NH 0 ) 5 75 NX 0 NP5 NP5 NP5 NP5 NP5 NP 0/ NP5 0 max. current NP NP Switch disconnector with fuses Order No. max. current KL KL KL50 0 KM50 0 KL5 0/ KM5 0 KL57 0/ KM KL 0 ) 70 5 NE x KL 00 NE 0 NE 0 NE 7 NE 8 NE 0 NE NE NE Table NH 0 ) / NH NP ) / NP KL55 0/ KM55 0 ) When maintaining pollution degree according to DIN VDE 00 Part 00, the rated insulation voltage of KL, KM and NP switch disconnectors (designed for degree of pollution ) is 000 V ) u recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards

31 Permissible loading and required connection cross-sections when used in l.v.h.b.c fuse bases and switch disconnectors SITOR fuse link Order No. NE NE NE NE 5 NE 7 NE 0-0B NE NE -0B NE NE -0B NE NE -0B NE 5 NE NE 7-8 NE 8-8 NE 0-8 Table 9- Rated current I n Required cross-section of cables/busbars l.v.h.b.c. fuse base mm Cu Order No x 50 0 x 50 x 50 x 85 x 85 x 00 x 00 x 0 NH 0 ) / NH 0 Suitable puller Fuse switch disconnector max. current Order No. Order No NH 0 ) NH 0 ) NX 0 NP ) / NP5 max. current NP NP Switch disconnector with fuses Order No. KL55 0/ KM55 0 KL57 0/ KM57 0 max. current KL 0 ) KL ) When maintaining pollution degree according to DIN VDE 00 Part 00, the rated insulation voltage of KL, KM and NP switch disconnectors (designed for degree of pollution ) is 000 V ) u recognized (U), for Guide Nos. and File Nos. of the pproval, refer to Section pplications and Standards 9

32 . ccessories for cylindrical fuses Permissible load and required connection cross-sections when using in cylindrical fuse bases and switch disconnectors SITOR fuse link Rated current Required connection cross-section Cylindrical fuse base Fuse puller Cylindrical fuse disconnector I n -phase I max -phase I max -phase I max -phase I max -phase I max -phase I max Order No. mm Cu Order No. Order No. Order No. Order No. Order No. Order No. Order No. NC 00 NC 00 NC 008 NC 00 NC 0 NC 0 NC 00 NC 05 NC NC NC NC NC 000 NC NC NC NC 0 NC NC 0 NC 0 NC 0 NC 0 NC 05 NC 0 NC 0 NC 5 NC 0 NC 5 NC 0 NC NC 0 NC NC NC NC NC NC 50 NC 50 NC 5.5 NC 0 NC 5 NC NC 0 NC 50 NC NC 80 NC NC NC NC NC Table 0-0

33

34

35 Characteristics and Dimension Drawings SITOR fuse links SITOR fuse links for special applications

36 I Characteristics. SITOR fuse links.. NC.. (IEC 0 9--, Size ), NC..- (IEC 0 9--, Size /0) ) Order No. NC NC - NC 5 NC 5- NC 7 NC 7- NC 8 NC 8- NC NC - Utilization category (IEC 0 9) gr gr gr gr gr Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. ccessories ) Fuse base, -pole Fuse puller Fused switch disconnector Switch disconnector with fuses Table - V s s K W kg ) NH 0 NX 0 NP5 KL 0-.B ) ) ) ) NC NC ) ) Envelope dimension and pullers correspond to IEC 09--; however, contact blades are slotted according to IEC 09-- ) Cooling air velocity m/s. For natural air cooling, reduced by 5 % ) Maximum current and minimum required connection cross-section when using fuse bases and switch disconnectors, refer to Section vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0 Prospective short-circuit current ) -7 Time/current characteristics p D9-509b Correction factor s 8 Peak arc voltage Recovery voltage 8 Correction factor k for clearing I t value Recovery voltage w 8 rc voltage -9 w D9-5000b D9-5097b

37 ) c x0 5 Let-through current x0 Unlimited peak values: DC component 50% DC component 0% x0 x x0 x0 x0 x0 5 Prospective short-circuit current ) 5-0 Let-through characteristics (current limiting at 50 Hz) p D9-5098b NC D9-5a-x Dimensions in mm 5- NC D9-5a-v Dimensions in mm 5-5

38 8.. NE (IEC 0 9--, Size 000/80) U Order No. NE8 7- NE8 75- NE8 70- NE8 70- NE8 77- NE8 78- Utilization category (IEC 0 9) gr gr gr gr gr Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table -5 vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x Time/current characteristics Prospective short-circuit current p NE87 Correction factor s Peak arc voltage Recovery voltage 0 Correction factor k for clearing I t value 00 rc voltage Recovery voltage w D9-500a-v w D9-500a-v

39 ) c x0 5 Let-through current Unlimited peak values: DC component 50% DC component 0% x0 x x x0 x0 x0 x0 5 Prospective short-circuit current ) 7- Let-through characteristics (current limiting at 50 Hz) p D9-5005b D9-50a 0 Dimensions in mm 7-7 7

40 8.. NE (IEC 0 9--, Size 000/80) U Order No. NE8 70- NE8 7- NE8 7- NE8 7- NE8 75- NE8 77- NE8 7- Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 8- vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0 8-8 Time/current characteristics Prospective short-circuit current p NE8- Correction factor 8-9 s Peak arc voltage Recovery voltage 0 Correction factor k for clearing I t value 00 rc voltage Recovery voltage w D9-500b D9-500b 700 w 8 8

41 c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% x x0 x x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p D v D9-50a 0 Dimensions in mm 9-9

42 I.. NC8.. (IEC 0 9--, Size ), NC8..- (IEC 0 9--, Size /0) ) Order No. NC8 NC8 - Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. ccessories ) Fuse base, -pole Fuse puller Fused switch disconnector Switch disconnector with fuses Table 0-7 V s s K W kg NC8 5 NC8 5- NC8 7 NC8 7- NC8 NC8 - NC8 NC8 - NC8 - gr gr gr gr gr 0 50 ) NH 0 NX 0 NP5 KL 0-B ) ) ) NX 0 ) Envelope dimension and pullers correspond to IEC 09--; however, contact blades are slotted according to IEC 09-- ) Cooling air velocity m/s. For natural air cooling, reduced by 0 % ) Maximum current and minimum required connection cross-section when using fuse bases and switch disconnectors, refer to Section. vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x x0 - - x x0 x0 x0 x0 5 Time/current characteristics 000 Prospective short-circuit current p ) D9-5099b Correction factor Recovery voltage w 8 Correction factor k for clearing I t value 0- s 8 Peak arc voltage rc voltage Recovery voltage w 8 D9-5008c D9-500b 0

43 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% 000 x x0 x x0 x0 x0 x0 5 Prospective short-circuit current p ) D9-50c - Let-through characteristics (current limiting at 50 Hz) NC D9-5a-x Dimensions in mm -7 NC D9-5a-v Dimensions in mm -8

44 8 I..5 NE (IEC 0 9--, Size 000) U Order No. Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) ) Power dissipation at I n ) Cyclic load factor WL Weight, approx. ccessories ) Fuse base, -pole Fuse base, -pole Fuse puller Fused switch disconnector Switch disconnector with fuses Table -8 V s s K W kg NE8-0 NE8-0 NE85-0 NE80-0 NE80-0 NE87-0 NE88-0 NE80-0 gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs NH 00 NH 00 NX 0 NP0/NP KL50 0-.B00 KM50 0-.B ) Temperature rise and power dissipation when used in an l.v.h.b.c. fuse base ) Minimum required connection cross-section when using the fuse base and switch disconnector, refer to Section KL50-.B00 KM50-.B00 x0 x0 x x0 x0 0 x0 - x0 - x x0 x0 x0 x0 Prospective short-circuit current ) vs Virtual pre-arcing time -9 Time/current characteristics p D9-5087c Correction factor -0 s Peak arc voltage Recovery voltage 0 NE Correction factor k for clearing I t value Recovery voltage rc voltage w D9-5085b w D9-508d

45 c Let-through current ) x0 5 x0 x0 Unlimited peak values: DC component 50% DC component 0% x0 x x0 x0 x0 x0 x0 5 - Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-5090c Dimensions in mm D9-5a -

46 8 I.. NE (IEC 0 9--, Size 00), NE..-0 (IEC 0 9--, Size ) U Order No. NE 0-0 NE 0-0 NE -0 NE 5-0 NE 7-0 NE 0-0 Utilization category (IEC 0 9) gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) ) Power dissipation at I n ) Cyclic load factor WL Weight, approx. V s s K W kg ccessories ) Fuse base, -pole NH 00 Fuse base, -pole NH 00 Fuse puller NX 0 Fused switch disconnector Switch disconnector with fuses Table -9 NP0 NP50 KL5 0-.B00 KM5 0-.B NH 0 NH 0 NP NP5 KL55 0-.B00 KM55 0-.B NH 0 NP5 ) Temperature rise and power dissipation when used in an l.v.h.b.c. fuse base ) Minimum required connection cross-section when using the fuse base and switch disconnector, refer to Section. KL57 0-.B00 KM57 0-.B00 x0 vs Virtual pre-arcing time x0 x0 x0 x0 0 x0 - x0 - x x0 x0 x0 x Time/current characteristics Prospective short-circuit current p ) D9-57b Correction factor Recovery voltage w 8 Correction factor k for clearing I t value -5 s Peak arc voltage NE Recovery voltage rc voltage NE D9-58b w D9-508d

47 ) x0 5 c Let-through current x0 Unlimited peak values: DC component 50% DC component 0% x0 x0 x x0 x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-5089c NE NE D9-5b Dimensions in mm 5 D9-55a 7 5 Dimensions in mm

48 8 I..7 NE..-0 (IEC 0 9--, Size ), NE..-0 (IEC 0 9--, Size ) U Order No. Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) ) Power dissipation at I n ) Cyclic load factor WL Weight. approx. V s s K W kg NE -0 NE -0 NE -0 NE -0 NE 5-0 NE -0 NE 7-0 NE 8-0 gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs gr/gs ccessories ) Fuse base, -pole NH 0 NH 0 Fuse puller NX 0 Fused switch disconnector Switch disconnector with fuses Table -0 NP5 KL57 0-.B00 KM57 0-.B NP5 KL 0-B NP5 KL ) Temperature rise and power dissipation when used in an l.v.h.b.c. fuse base ) Minimum required connection cross-section when using the fuse base and switch disconnector, refer to Section vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - x x0 x0 x0 x0 5-0 Time/current characteristics Prospective short-circuit current p ) D9-5088d Correction factor - s Peak arc voltage NE..-0 NE Recovery voltage Correction factor k for clearing I t value Recovery voltage rc voltage w D9-5c w D9-508d

49 c Let-through current ) x0 5 x0 Unlimited peak values: DC component 50% DC component 0% x0 x0 x x0 x0 x0 x0 x0 5 Prospective short-circuit current p ) Let-through characteristics (current limiting at 50 Hz) 7- D9-59d NE..-0 NE Dimensions in mm D9-5b Dimensions in mm D

50 8 I..8 NE..- (IEC 0 9--, Size ) U Order No. NE 7- NE 8- Utilization category (IEC 0 9) gr gr Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) ) Power dissipation at I n ) Cyclic load factor WL Weight, approx. V s s K W kg ccessories ) Fuse base, -pole NH 0 Fuse puller NX 0 Fused switch disconnector Switch disconnector with fuses Table 8- NP5 KL ) Temperature rise and power dissipation when used in an l.v.h.b.c. fuse base ) Minimum required connection cross-section when using the fuse base and switch disconnector, refer to Section. 7.0 vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - x x0 x0 x0 x Time/current characteristics 70 Prospective short-circuit current p ) D9-5088c-v Correction factor 8-7 s Peak arc voltage Correction factor k for clearing I t value rc voltage Recovery voltage Recovery voltage w D9-5-v w D9-508-v 8

51 c Let-through current ) x0 5 x0 Unlimited peak values: DC component 50% DC component 0% 70 x0 x0 x x0 x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-59c-v D9-57 Dimensions in mm

52 8 I..9 NE 0..- (Size 00), NE..- (Size ), NE..- (Size ), IEC U Order No. Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) ) Power dissipation at I n ) Cyclic load factor WL Weight, approx. V s s K W kg NE 0- NE - NE 5- NE 7- NE 0- NE - NE - gr gr gr gr gr gr gr gr ccessories ) Fuse base, -pole NH 00 NH 0 NH 0 NH 0 Fuse puller NX 0 Fused switch disconnector Switch disconnector with fuses Table 50- NP50 KL5 NP5 KL55 NP5 KL NP5 KL ) Temperature rise and power dissipation when used in an l.v.h.b.c. fuse base ) Minimum required connection cross-section when using the fuse base and switch disconnector, refer to Section. NE vs Virtual pre-arcing time 50-5 x0 x0 x0 x0 x0 0 x0 - x x x0 x0 x0 x0 5 Prospective short-circuit current ) Time/current characteristics p NE0- Correction factor 50-5 s Peak arc voltage Recovery voltage Correction factor k for clearing I t value w NE Recovery voltage 8 w NE rc voltage 50

53 c ) Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% x0 x0 5-5 x x0 x0 x0 x0 5 Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) NE0- NE 0..- NE D9-5b Dimensions in mm 5 D9-55a 7 5 Dimensions in mm NE D9-5b 9 Dimensions in mm 5

54 8 I..0 NE..- (IEC 0 9--, Size ) U Order No. NE 5- NE - NE 7- NE 7- NE 8- NE 8- Utilization category (IEC 0 9) gr gr gr gr gr gr Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) ) Power dissipation at I n ) Cyclic load factor WL Weight, approx. V s s K W kg ccessories ) Fuse base, -pole NH 0 Fuse puller NX 0 Fused switch disconnector Switch disconnector with fuses Table 5- NP5 KL NP5 KL ) Temperature rise and power dissipation when used in an l.v.h.b.c. fuse base ) Minimum required connection cross-section when using the fuse base and switch disconnector, refer to Section vs Virtual pre-arcing time 5-58 x0 x0 x0 x0 x0 0 x0 - x0 - x x0 x0 x0 x0 5 Prospective short-circuit current ) Time/current characteristics p NE- Correction factor s Peak arc voltage Recovery voltage Correction factor k for clearing I t value w NE Recovery voltage 8 w NE- 5-0 rc voltage 5

55 c ) Let-through current x0 5 x0 Unlimited peak values: DC component 50% DC component 0% x0 x x0 x0 x0 x0 5 Prospective short-circuit current p ) NE- 5- Let-through characteristics (current limiting at 50 Hz) D9-57 Dimensions in mm 5-5

56 I.. NE (IEC 0 9--, Size 00) U Order No. Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. ccessories ) Fuse base, -pole Fuse base, -pole Fuse puller Fused switch disconnector Switch disconnector with fuses Table 5- V s s K W kg NE805- NE- NE807- NE808- NE- NE80- NE80- NE80- gr gr gr gr NH 00 NH 00 NX 0 NP0 NP50 KL50 0-.B00 KM50 0-.B KL5 0-.B00 KM5 0-.B ) Max. current and min. required connection cross-section when using fuse bases and switch disconnector, refer to Section vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0-5- x0 - - x x0 x0 x0 x0 Time/current characteristics Prospective short-circuit current p ) D9-5b Correction factor Recovery voltage w 8 Correction factor k for clearing I t value 5- Peak arc voltage 00 s Recovery voltage w 8 rc voltage 5-5 D9-5b D9-58b 5

57 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% x0 x x x0 x0 x0 x0 5 Prospective short-circuit current p ) D9-508b 55- Let-through characteristics (current limiting at 50 Hz) D9-5b Dimensions in mm

58 I.. NE..-0B, NE 7 (IEC 0 9--, Size /0) ) Order No. NE 7-0B NE 0-0B NE -0B NE -0B NE 7 Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg ccessories ) Fuse base, -pole NH 0 NH 0 Fuse puller NX 0 Fused switch disconnector Switch disconnector with fuses Table 5-5 NP5 KL57 0-.B00 KM57 0-.B00 NP5 KL NP5 KL ) Envelope dimension and pullers correspond to IEC 09--; however contact blades are slotted according to IEC 09-- ) Max. current and min. required connection cross-section when using fuse bases and switch disconnector, refer to Section. vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0 5 Prospective short-circuit current ) Time/current characteristics p D9-50b Correction factor s Peak arc voltage Recovery voltage Correction factor k for clearing I t value Recovery voltage w 8 rc voltage 5-70 w D9-5009b D9-50b 5

59 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% 70 x x0 x x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-50b D9-5a Dimensions in mm

60 I.. NE.. (IEC 0 9--, Size 0) U Order No. NE 0 NE 0 NE 7 NE 8 NE 0 NE NE NE Utilization category (IEC 0 9) gr gr gr Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. ccessories ) Fuse base, -pole Fuse base, -pole Fuse puller Fused switch disconnector Switch disconnector with fuses Table 58- V s s K W kg NH 0 NH 0 NX 0 NP, NP5 KL55 0-.B00 KM55 0-.B ) Max. current and min. required connection cross-section when using fuse bases and switch disconnector, refer to Section vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x x0 - - x x0 x0 x0 x0 Time/current characteristics Prospective short-circuit current p ) D9-505b Correction factor 58-7 s Peak arc voltage Recovery voltage 8 Correction factor k for clearing I t value Recovery voltage 8 rc voltage w w D9-500b D9-50b 58

61 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% x0 x x x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-507b D9-55a Dimensions in mm

62 8 I.. NE. (IEC 0 9--, Size /0) ) U Order No. NE NE NE NE 5 NE 7 Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. ccessories ) Fuse base, -pole Fuse base, -pole Fuse puller Fused switch disconnector Switch disconnector with fuses Table 0-7 V s s K W kg NH 0 NH 0 NX 0 NP, NP5 KL55 0-.B00 KM55 0-.B ) Envelope dimension and pullers correspond to IEC 09--; however contact blades are slotted according to IEC 09-- ) Max. current and min. required connection cross-section when using fuse bases and switch disconnector, refer to Section vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x Time/current characteristics Prospective short-circuit current p ) D9-50c Correction factor 0-79 s Peak arc voltage Recovery voltage 8 Correction factor k for clearing I t value Recovery voltage 8 rc voltage w w D9-50b D9-505b 0

63 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% x x0 x x0 x0 x0 x0 5 Prospective short-circuit current p ) D9-50b -8 Let-through characteristics (current limiting at 50 Hz) D9-505x-a Dimensions in mm -8

64 8 I..5 NE. (IEC 0 9--, Size /0) ) U Order No. NE 0-0B NE NE -0B NE Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. ccessories ) Fuse base, -pole Fuse puller Fused switch disconnector Switch disconnector with fuses Table -8 V s s K W kg NH 0 NX 0 NP5 KL57 0-.B00 KM57 0-.B ) Envelope dimension and pullers correspond to IEC 09--; however contact blades are slotted according to IEC 09-- ) Max. current and min. required connection cross-section when using fuse bases and switch disconnector, refer to Section vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0-8 Time/current characteristics Prospective short-circuit current p ) D9-50b Correction factor -8 s Peak arc voltage Recovery voltage 8 Correction factor k for clearing I t value Recovery voltage 8 rc voltage w w D9-50b D9-505b

65 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% x x0 x x0 x0 x0 x0 5 Prospective short-circuit current p ) D9-507b -8 Let-through characteristics (current limiting at 50 Hz) D9-505x-a Dimensions in mm -87

66 8 I.. NE.. (IEC 0 9--, Size /0) ) U Order No. NE -0B NE NE -0B NE 5 NE NE 7-8 NE 8-8 NE 0-8 Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg ccessories ) Fuse base, -pole Fuse puller Fused switch disconnector NH 0 NX 0 NP5 Switch disconnector with fuses KL 0-B0 KL Table ) Envelope dimension and pullers correspond to IEC 09--; however contact blades are slotted according to IEC 09-- ) Max. current and min. required connection cross-section when using fuse bases and switch disconnector, refer to Section vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0-900 x0 - - x x0 x0 x0 x0 5 Prospective short-circuit current p ) -88 Time/current characteristics D9-508b Correction factor -89 s Peak arc voltage Recovery voltage 8 Correction factor k for clearing I t value Recovery voltage 8 rc voltage w w D9-509c D9-505b

67 ) c x0 5 Let-through current Unlimited peak values: DC component 50% DC component 0% x x0 x x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-500c D9-505a Dimensions in mm 5-9 5

68 I..7 NE.., NE.. (IEC 0 9--, Size /0) Order No. NE NE NE 0 NE NE 5 NE 5- Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. Table -0 V s s K W kg NE NE NE 7, NE 7- ) ) Inside caliper 0 mm, M -screw connection vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x Time/current characteristics Prospective short-circuit current p ) D9-50b Correction factor s Peak arc voltage Recovery voltage 8 Correction factor k for clearing I t value Recovery voltage w 8 rc voltage -95 w D9-50b D9-508b

69 ) c Let-through current x0 5 x0 Unlimited peak values: DC component 50% DC component 0% x0 x x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-50b NE.., NE.., NE..- NE 5-0 a c M b c D9-57a 70 b 8.5 a D9-5a Order No. a b c NE.. NE.. NE Dimensions in mm Dimensions in mm

70 I..8 NE5.., NE5 - (IEC 0 9--, Size /0) Order No. NE5 NE5 NE5 0 NE5 NE5 NE5 - Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 8- vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x Time/current characteristics Prospective short-circuit current p ) D9-509b Correction factor Recovery voltage w 8 Correction factor k for clearing I t value s Peak arc voltage Recovery voltage w 8 rc voltage 8-0 D9-509b D9-50b 8

71 ) c x0 5 Let-through current Unlimited peak values: DC component 50% DC component 0% x0 5 0 x0 x x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-5b a a D9-58a Order No. NE5.. NE a.5 Dimensions in mm 9

72 I..9 NE5.. (IEC 0 9--, Size /70) Order No. NE5 7 NE5 NE5 Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 70- vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0 5 Prospective short-circuit current ) Time/current characteristics p D9-5b Correction factor Recovery voltage w 8 Correction factor k for clearing I t value s Peak arc voltage Recovery voltage w 8 rc voltage 70-0 D9-509b D9-50b 70

73 ) c x0 5 Let-through current Unlimited peak values: DC component 50% DC component 0% x0 50 x0 x x0 x0 x0 x0 5 Prospective short-circuit current p ) D9-5b 7-07 Let-through characteristics (current limiting at 50 Hz) Dimensions in mm D9-59a

74 I..0 NE7.., NE7.. (IEC 0 9--, Size /0) Order No. Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. Table 7- V s s K W kg ) M -screw connection NE75 NE77 NE7 NE7 NE7, NE7- ) NE78- ) NE7, NE7- ) NE77- ) vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0 5 Prospective short-circuit current ) 7-09 Time/current characteristics p D9-500c Correction factor s Peak arc voltage Recovery voltage Correction factor k for clearing I t value Recovery voltage w 8 rc voltage 7- w D9-50b D9-5b 7

75 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% x , 50 x0 x x0 x0 x0 x0 5 Prospective short-circuit current p ) D9-50b 7- Let-through characteristics (current limiting at 50 Hz) a a D9-58a Order No. NE7.. NE7.. NE a.5.5 Dimensions in mm 7

76 I.. NE9.. (IEC 0 9--, Size /0) Order No. NE9 - NE9 - NE9 - Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 7- vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0 5 Prospective short-circuit current ) 7- Time/current characteristics p D9-50b Peak arc voltage Correction factor s Recovery voltage 8 Correction factor k for clearing I t value Recovery voltage 8 rc voltage w w D9-50b D9-505b 7

77 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% x0 x0 x x0 x0 x0 x0 5 Prospective short-circuit current ) 75-7 Let-through characteristics (current limiting at 50 Hz) p D9-50b Dimensions in mm 0 87 D9-50a

78 8 I.. NC 0.. (IEC 0 9--/III, Size 0 x 8 mm) U Order No. NC 00 NC 00 NC 008 NC 00 NC 0 NC 0 NC 00 NC 05 NC 0 Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 7-5 vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0-7-9 x x0 0 x0 x0 x0 Prospective short-circuit current ) Time/current characteristics p NC0- Correction factor 7-0 s Peak arc voltage V Recovery voltage Correction factor k for clearing I t value Recovery voltage 8 w w NC0- NC0-7- rc voltage 7

79 c ) Let-through current x0 x0 5 0 x0 0 8 x x0 x0 x0 x0 Prospective short-circuit current p ) NC0- x Let-through characteristics (current limiting at 50 Hz) 0. NC Dimensions in mm 77-77

80 I.. NC.. (Size 0 x 8 mm, Midget Fuse) Order No. NC 0 NC 05 Utilization category (IEC 0 9) CLSS CC CLSS CC Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 78- x0 vs Virtual pre-arcing time x0 5 x0 0 x0 - NC- x x0 0 x0 x0 x0 Prospective short-circuit current p ) 78- Time/current characteristics 78

81 x0 c ) Let-through current x0 5 x0 x x0 x0 x0 x0 8 Prospective short-circuit current p ) NC- x Let-through characteristics (current limiting at 50 Hz) NC-5 5 8,5 Dimensions in mm 79-79

82 8 I.. NC.. (IEC 0 9--/III, Size x 5) U Order No. NC 0 NC 0 NC 0 NC 0 NC 05 NC 0 NC 0 Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 80-7 vs Virtual pre-arcing time x0 x x0 x0 x0 x0-5 0 x0 - - x x0 0 x0 x0 x0 Prospective short-circuit current p ) Time/current characteristics NC-a Correction factor 80-8 s Peak arc voltage Recovery voltage Correction factor k for clearing I t value Recovery voltage 8 w w NC-a NC rc voltage 80

83 c ) Let-through current x0 x0 x0 0 5 x x0 x0 x0 x0 8 Prospective short-circuit current p x0 5 ) NC-a 8-0 Let-through characteristics (current limiting at 50 Hz). NC Dimensions in mm 8-8

84 8 I..5 NC.. (IEC 0 9--/III, Size x 5) U Order No. NC 5 NC 0 NC 5 NC 0 NC NC 0 NC 50 Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 8-8 vs Virtual pre-arcing time x0 x x0 x0 x0 x0-5 0 x0 - - x x0 x0 x0 x0 Prospective short-circuit current p ) Time/current characteristics NC-b Correction factor 8- s Peak arc voltage Recovery voltage Correction factor k for clearing I t value Recovery voltage 8 w w NC-b NC- 8- rc voltage 8

85 c ) Let-through current x0 x x0 x x0 x0 x0 x0 8 Prospective short-circuit current p x0 5 ) NC-b 8-5 Let-through characteristics (current limiting at 50 Hz). NC Dimensions in mm 8-8

86 I.. NC 5.. (IEC 0 9--/III, Size x 5) U Order No. NC 50 NC 50 NC 5 Utilization category (IEC 0 9) gg gg gg Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 8-9 vs Virtual pre-arcing time x0 5 x0 x0 x0 x0 x0 0 Correction factor Recovery voltage Correction factor k for clearing I t value w NC5- x0 - x0 - NC x0 0 x0 x0 x0 Prospective short-circuit current p ) 8-7 Time/current characteristics 8

87 ) x0 c Let-through current Unlimited peak values: DC component 50% DC component 0% x0 8 x x x0 x0 x0 x0 5 Let-through characteristics (current limiting at 50 Hz) Prospective short-circuit current p NC5- ). NC Dimensions in mm

88 8 I..7 NC.. (IEC 0 9--/III, Size x 58) U Order No. NC 0 NC 5 NC NC 0 NC 50 NC NC 80 NC 00 Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 8-0 vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x x x0 x0 x0 x0 Prospective short-circuit current ) Time/current characteristics p NC- Correction factor 8- s Peak arc voltage Recovery voltage Correction factor k for clearing I t value Recovery voltage 8 w w NC- NC- 8- rc voltage 8

89 ) x0 c Let-through current x x x0 x0 x0 x0 5 Prospective short-circuit current p ) NC- 87- Let-through characteristics (current limiting at 50 Hz). NC-5 58 Dimensions in mm

90 I. SITOR fuse links for special applications.. NE 5..-5, NE..-5 Order No. NE 7-5 NE -5 NE -5 NE 55-5 ) NE 55-5 ) Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. Table 88- V s s K W kg gr ) Maximum tightening torque M 0 blind tapping: 5 Nm, screw-in penetration depth 9mm ) Cooling air velocity 0.5 m/s. For natural air cooling, reduced by 5% ) ) vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0 Prospective short-circuit current p ) 88- Time/current characteristics D9-55b Correction factor s Peak arc voltage , 00 00, Recovery voltage 8 Correction factor k for clearing I t value < Recovery voltage w 8 rc voltage 88-8 w > 00 D9-507b D9-5b 88

91 ) c Let-through current x0 5 x0 Unlimited peak values: DC component 50% DC component 0% x0 x x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-57b NE NE M D9-5a Dimensions in mm D9-5a 0 Dimensions in mm

92 I.. NE..-B, NE 7- Order No. NE 7-B ) NE 0-B ) NE -B ) NE -B ) NE 7- ) Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. Table 90- V s s K W kg ) Maximum tightening torque M 0 blind tapping: 5 Nm, screw-in penetration depth 9 mm vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0 5 Prospective short-circuit current ) Time/current characteristics p D9-50b Correction factor s Peak arc voltage Recovery voltage Correction factor k for clearing I t value Recovery voltage w 8 rc voltage 90-5 w D9-508b D9-50b 90

93 ) c Let-through current x0 5 x0 Unlimited peak values: DC component 50% DC component 0% x0 x x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-50b M D9-55a Dimensions in mm 9-5 9

94 I.. NC5 5, NC5 8.. Order No. NC5 5 ) NC5 8 ) NC5 80 ) NC5 88 ) Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. Table 9- V s s K W kg 50 ) ) ) Maximum tightening torque: - M 0 thread (with indicator): 0 Nm - M 0 blind tapping: 50 Nm, screw-in penetration depth 9 mm - M x.5 thread: 0 Nm ) Temperature of the water-cooled busbar, max. +5 C ) ) vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x0 5 Prospective short-circuit current ) Time/current characteristics 00 0 p D9-58b Correction factor s Peak arc voltage Recovery voltage 8 Correction factor k for clearing I t value rc voltage , Recovery voltage 8 w w D9-509b D9-59b 9

95 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% 00 0 x0 50 x0 x x0 x0 x0 x Prospective short-circuit current Let-through characteristics (current limiting at 50 Hz) p ) D9-50b NC5 5 NC M 7 M0 M0 SW M0 NC55 SW M0 b a c D9-5a Order No. a b c Dimensions in mm NC5 8 NC5 80 NC Dimensions in mm

96 I I.. NE.., NE9 50, NE 7-7, NE9 0-, NE Order No. NE9 0- NE9 50 NE 7 NE NE NE 7-7 Utilization category (IEC 0 9) gr Rated voltage V n Rated current I n ) Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. Table 9- V s s K W kg ) ) ) ) Maximum tightening torque M 0 blind tapping: 5 Nm, screw-in penetration depth 9 mm ) Cooling air velocity m/s ) Lower (cooled) connection, max. +0 C, upper connection (M 0) max. +0 C ) ) x0 x0 vs Virtual pre-arcing time x0 x0 vs Virtual pre-arcing time x0 x0 x0 x x0 x x0 - x0 - - x0 8 8 x0 x0 Prospective short-circuit current p ) D9-500c x0 - x0 - x0-8 8 x0 x0 Prospective short-circuit current p ) D9-50b 9- Time/current characteristics 9

97 ) c Let-through current x0 5 x0 Unlimited peak values: DC component 50% DC component 0% Correction factor , Recovery voltage 8 Correction factor k for clearing I t value w D9-50b x0 x x0 x0 x0 x0 5 Prospective short-circuit current p ) D9-5b 0 s Peak arc voltage Recovery voltage 8 w D9-5b 95-5 Let-through characteristics (current limiting at 50 Hz) 95- rc voltage NE.., NE9.., NE9..- NE..-7, NE M M0 70 b 8.5 a D9-5a Order No. a b NE9 0- NE9 50 NE 7 NE Dimensions in mm D9-5a Dimensions in mm

98 I..5 NC7..- Order No. NC7 7- NC7 - Utilization category (IEC 0 9) Rated voltage V n Rated current I n Pre-arcing I t value I t s (t vs = ms) Clearing I t value I t at V n Temperature rise at I n (center of the fuse body) Power dissipation at I n Cyclic load factor WL Weight, approx. V s s K W kg Table 9-5 vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - - x x0 x0 x0 x Time/current characteristics Prospective short-circuit current p ) D9-5b Correction factor s Peak arc voltage Recovery voltage Correction factor k for clearing I t value rc voltage Recovery voltage 8 w w D9-50b D9-5b 9

99 ) c Let-through current x0 5 Unlimited peak values: DC component 50% DC component 0% x0 x0 x x0 x0 x0 x0 5 Prospective short-circuit current p ) D9-55b 97-7 Let-through characteristics (current limiting at 50 Hz).5, D9-5a Dimensions in mm

100 Dimension Drawings ccessories M8 0 (M) M8..8 D9-55 Dimensions in mm D9-50a Dimensions in mm (M8) M D9-55a Dimensions in mm 98-7 Fuse base NH Fuse base NH Fuse base NH (M8) (M8) (M) 5.5 M D9-550a M0 D9-55a 5 90 Dimensions in mm M D95-555a 5 0 Dimensions in mm.5. Dimensions in mm Fuse base NH Fuse base NH Fuse base NH 00 98

101 (M8) M0 D9-55a D9-55a Dimensions in mm Dimensions in mm Fuse base NH Fuse puller NX NC08-0 NC NC08-0 Dimensions in mm Dimensions in mm Dimensions in mm 99-8 Fuse base NC Fuse base NC Fuse base NC 08-99

102 90 NC Dimensions in mm Fuse base NC 5- Phase barrier for NC5-00

103 . NC Dimensions in mm 0-8 Fuse base NC58- Phase barrier for NC58-0

104 0

105 Technical Description and Terminology Technical Information Rated voltage V n Rated current I n, load capacity I t values Time/current characteristics ctual pre-arcing time Taking into account the pre-loading, residual value RW Let-through current I c Rated interrupting capacity rc voltage Û s Power dissipation, temperature rise Connecting fuse links in parallel and series DC current applications Indicators ccessories Determining the Rated Current Determining the rated current I n for ageing-free operation with cyclic loads Selection examples Fuse Monitoring Terminology 0

106 Technical Information Fuse links are selected according to the rated voltage, rated current, clearing I t value I t and the cyclic load factor taking into account the other conditions specified in Section Technical Description and Terminology. Unless otherwise noted, all of the following data and information refer to C operation at frequencies of between 5 and Hz.. Rated voltage V n The rated voltage of a SITOR fuse link is the RMS value of an C voltage which is specified in the Ordering and Engineering Data, and the Characteristic Values as well as on the fuse link itself. The rated voltage of a fuse link should be selected so that it reliably clears the voltage which is driving the short-circuit current. The driving voltage may not exceed a value of V n + 0 %. It should be noted that the supply voltage V v0 of a converter can increase by 0 %. If two branches of a converter circuit are in series in the short-circuit path, then for an adequately high short-circuit current it can be assumed that the voltage is evenly distributed. In this case it is imperative that the information and instructions in Section.. Fuse links in series is carefully observed... Rectifier operation For converters which only operate in the rectifier mode, the connection voltage V v0 is the driving voltage... Inverter operation For converters which also operate in the inverter mode, inverter commutation faults can occur when a fault develops. In this case, the driving voltage V WK in the short-circuit is the sum of the supplying DC voltage (e.g. EMF of the DC motor) and the connection voltage on the three-phase side. In order to dimension the fuse link, this sum can be replaced by an C voltage whose RMS value corresponds to 80% of the connection voltage on the three-phase side (V WK =.8 V v0 ). The fuse links must be dimensioned so that they reliably clear voltage V WK.. Rated current I n, load capacity The rated current of a SITOR fuse link is the RMS value of an C current for a frequency range of between 5 and Hz specified in Sections and Ordering and Engineering Data and Characteristics and Dimension Drawings as well as the current specified on the fuse link itself. When fuse links are used with the rated current, the standard operating conditions are as follows: Natural air cooling with an ambient temperature of +5 C Connection cross-sections the same as the test cross-sections (refer to Section..), when used in l.v.h.b.c. fuse bases and switch disconnectors, refer to Section 'Ordering and Engineering Data' Current conduction angle of half a period 0 el Continuous maximum load with the rated current For operating conditions which deviate from these, the permissible load current In' of the SITOR fuse link is determined using the following formula I n = k u x k q x k λ x k l x WL x I n with I n... rated current of the fuse link ) k u... correction factor, ambient temperature (Section..) k q... correction factor, connection cross-section (Section..) k λ... correction factor, current conduction angle (Section..) k l... correction factor, forced air cooling (Section..5) WL...cyclic load factor (Section..) ) When using SITOR fuse links in l.v.h.b.c. fuse bases according to IEC/EN 09-- as well as in fused switch disconnectors and switch disconnectors with fuses, the information in Section 'Ordering and Engineering Data' must also be observed. 0

107 .. Test cross-sections Rated current I n Test cross-section (series NC0, NC, NC, NC5, NC, NE..., NE8 0.., NE) Cu mm Cu mm x x x x x x x x (0 x 5) 50 x (50 x 5) x (80 x ) Table 05- Test cross-sections of SITOR fuse links Test cross-section (all of the remaining series).. Correction factor, ambient temperature k u The influence of the ambient temperature on the permissible load placed on the SITOR fuse link is taken into account using correction factor k u corresponding to the following diagram. u Correction factor mbient temperature Correction factor, ambient temperature.. Correction factor, connection cross-section k q The rated current of SITOR fuse links is valid for use with connection cross-sections which correspond to the particular test cross-section (refer to Section..). For reduced connection cross-sections, correction factor k q, as shown in the following diagram, should be applied. q Correction factor > = D Connection cross-section (as a % of the test cross-section) a) Cross-section reduction of one connection b) Cross-section reduction of both connections D Correction factor, connection cross-section 05

108 .. Correction factor, current conduction angle k λ The rated current of SITOR fuse links is based on a sinusoidal C current (5 Hz to Hz). In converter operation, the fuses in the branch have to conduct an intermittent current whereby the current conduction angle in most cases is either 80 el or 0 el. When the load current has this waveform, the fuse link can still conduct the full rated current. The current must be reduced corresponding to the following diagram for lower current conduction angles. l.. Cyclic load factor WL The cyclic load factor WL is a reduction factor which can be used to determine the ageing-free load capacity of a fuse link for any load duty cycle. SITOR fuse links have different cyclic load factors as a result of the mechanical design. The particular cyclic load factor WL for >0000 load cycles ( hour "on", hour / L n. "off") during the expected operating time of the fuse links is specified in Section 'Characteristics and Dimension Drawings'. For a lower number of load cycles during the expected operating time of the fuse links, then according to the following diagram, a fuse link with a lower cyclic factor WL is adequate Correction factor Valve conducting period Correction factor, valve conducting period 0..5 Correction factor for increased air cooling k l With increased air cooling, the load capacity of the fuse links increases with the air velocity; air velocities > 5 m/s significantly increases the load capacity. Correction factor ir velocity I D9-5055b D9-505b I La...Load current of the link I n... Rated current of the fuse link Cyclic load factor WL characteristic for load cycles For a uniform load (no load duty cycles and no interrupt operations), then a cyclic load factor WL = can be assumed. For load duty cycles as well as interrupt operations, which last longer than 5 min., and which occur more frequently than x per week, then the cyclic load factor WL specified for the individual fuse links in Section 'Characteristics and Dimension Drawings' should be selected Permissible number of load cycles D9-5058b 0-90 Correction factor for increased air cooling 0

109 ..7 Fuse currents when used in a converter The RMS value of the fuse current for the most usual converter circuit configurations can be calculated from the (smoothed) DC current Id and from the phase current IL according to the following table. Converter circuit configuration Single-pulse center-tap circuit -pulse center-tap circuit -pulse center-tap circuit -pulse center-tap circuit Double -pulse center-tap circuit (parallel) -pulse bridge circuit -pulse bridge circuit (M) (M) (M) (M) (M.) (B) (B) RMS value of the phase current (phase fuse).57 I d 0.7 I d 0.58 I d 0. I d I d RMS value of the branch current (branch fuse).0 I d 0.8 I d 0.7 I d 0.58 I d Single-phase bi-directional circuit (W).0 I L 0.7 I L Table 07-7 Fuse currents when used in a converter 07

110 . I t values When a short-circuit develops, the current through the fuse link increases, during the pre-arcing time t s up to the let-through current I c (peak melting current). During the arc time t L the arc forms and the short-circuit current is cleared (refer to the following diagram). i c 08-9 s Current characteristic when a fuse ruptures The integral of the square of the current over the complete clearing time (t s +t L ) also known as the clearing I t value, defines the heat which the semiconductor component is subject to, which is to be protected, during the interrupt operation. ( I dt) In order to provide adequate protection, the clearing I t value of the fuse link must be less than the I t value of the semiconductor component. The clearing I t value of the fuse link practically decreases the same as the I t value of a semiconductor component with increasing temperature, i.e. increasing pre-loading. This means that it is sufficient to compare the I t values in the non-loaded (cold) condition. The clearing I t value (I t ) is the sum of the pre-arcing I t value (I t s ) and the arcing I t value (I t L ). ( I dt) (semiconductor, t vj = 5 C, t p = 0 ms) > ( I t ) (fuse link) L D Pre-arcing I t value I t s The pre-arcing I t value can be calculated for any time from the value pairs of the time/current characteristic of the fuse link. For decreasing pre-arcing times, the pre-arcing I t value goes to a lower limit value where, during melting, almost no heat is dissipated from the notches of the fuse element to the environment. The pre-arcing I t values, specified in Sections and of the Ordering and Engineering Data und Characteristics and Dimension Drawing correspond to the pre-arcing time of t vs =ms... rcing I t value I t L While the pre-arcing I t value is a characteristic of the fuse link, the arcing I t value depends on the circuit data, and more precisely on the recovery voltage V w on the power factor cos ϕ of the short-circuit loop on the prospective current I p (current at the location where the fuse link is mounted if this is bypassed) The maximum of the arcing I t value is reached, depending on the fuse type, at a current of between 0 I n up to 0 I n... Clearing I t value I t, correction factor k The clearing I t values of the fuse links are specified in Section Characteristics and Dimension Drawings for rated voltage V n. The correction factor k should be taken into account when determining the clearing-i t value for a recovery voltage V w. I t (for V w ) = I t (for V n ) x k The "Correction factor k " characteristic (refer to the following diagram) is specified for the individual fuse series in Section Characteristics and Dimension Drawing. The clearing I t values, determined in this fashion, are valid for prospective currents I p 0 x l n and cos ϕ = 0.5. Correction factor Recovery voltage Example: Series NE Correction factor k for clearing I t value Taking into account the recovery voltage V w The recovery voltage V w is obtained from the voltage which drives the short-circuit current. The driving voltage is, in most fault situations, the same as the supply voltage V v0. For inverter commutation faults, it is 80% of the supply voltage V v0 (refer to Section. Rated voltage ). If two branches of a converter circuit are located in the short-circuit loop, and there are therefore two fuse links in series, when the short-circuit current is sufficiently high (refer to Section..), then it can be assumed that the voltage will be evenly distributed. This means V w = 0.5 V v0 or, for inverter commutation faults, V w = V v0. w D9-500b 08

111 ..5 Influence of the power factor cos ϕ The data provided in Section Characteristics and Dimension Drawings for the clearing I t values (I t ) refers to a power factor of cos ϕ = 0.5 (exception: For SITOR fuse links NC5 8.., NE.., NE9.., then cos ϕ = 0. applies). The following diagram shows the relationship between the clearing I t values and the power factor cos ϕ at.0 V n and at 0.5 V n. Cleaning- value at cos (as a % of at cos = 0.5 or 0.) I for.0 U n for 0.5 U n a b Power factor cos a) for SITOR fuse links NC5 8..., NE..., NE9.. (reference to cos ϕ = 0,) b) for all other SITOR fuse links (reference to cos ϕ = 0,5) Clearing I t value I t for SITOR fuse links as a function of power factor cos ϕ D9-50b. Time/current characteristics In the following diagram the time/current characteristics shown indicate the time up to melting for the unloaded fuse link from the cold state (max. +5 C). vs Virtual pre-arcing time x0 x0 x0 x0 x0 0 x0 - x0 - x x0 x0 x0 x0 Prospective short-circuit current ) p : Utilization Category gr 0 : Utilization Category 0 Time/current characteristics of fuse links If the time/current characteristic is shown as dotted line in the long time range (t vs > 0 s) (fuse links, utilization Category ), then this represents the limit of the permissible overload from the cold condition. If the dotted section of the characteristic is exceeded, there is a danger that the ceramic body of the fuse link could be damaged. The fuse link can only be used as short-circuit protection. In this case an additional protective device (overload relay, circuit-breaker) is required to provide overload protection. For closed-loop controlled converter units the closed-loop current limiting control is sufficient. If the time/current characteristic is a solid line over the complete time range (fuse links, utilization Category gr or gs), then the fuse link can interrupt the current over the complete time range. This means that it can be used for overload and short-circuit protection. D9-5078b.5 ctual pre-arcing time The virtual pre-arcing time t vs is specified in the time/current characteristic as a function of the prospective current. This is a value which is valid for a squarewave current (di/dt) = ). For pre-arcing times t vs < 0 ms, the virtual pre-arcing time t vs deviates from the actual pre-arcing time t s. The actual pre-arcing time can (depending on the current rate-of-rise) be several milliseconds longer. In the range of several milliseconds, over which time the increase of the short-circuit current can be considered to be linear, for a sinusoidal current increase and at 50 Hz, the actual pre-arcing time is given by: xi t s t s = I c 09

112 ). Taking into account the pre-loading condition, residual value factor RW pre-loading condition of the fuse link reduces the permissible overload duration and the pre-arcing time. The residual value factor RW can be used to determine the time for which a fuse link can be operated, ageing-free at any overload current I La during a periodic or non-periodic load duty cycle above the previously determined permissible load current I n. The residual value factor RW depends on the pre-loading condition V (I rms RMS fuse current during the load duty cycle to the permissible load current I n ) V = I rms I n as well as the frequency of the overload conditions (refer to the following diagram, characteristics a and b). Rest value factor b a Pre-load factor a) Frequent impulse/load duty cycle currents (> /week) b) Seldom impulse/load duty cycle currents (< /week) c) Pre-arcing time for pre-loading c D9-50b.7 Let-through current I c The let-through current I c can be determined from the let-through characteristics (current limiting at 50 Hz) specified for the particular fuse link in Section Characteristics and Dimension Drawings. The let-through current is dependent on the prospective current and the DC current element when the short-circuit actually occurs (instant of switch-on). The let-through current I c of a fuse link as a function of the prospective short-circuit current I p is shown in the following diagram using as an example a SITOR fuse link NE -0B. c Let-through current x0 5 x0 x Unlimited peak values: DC component 50% DC component 0% Let-through current I c of a fuse link 50 x0 x0 x0 x0 x0 5 Prospective short-circuit current p ) Example: SITOR fuse link NE -0B D9-5079b 0-9 Permissible overload and pre-arcing time for a pre-loading condition Permissible overload duration = residual value factor RW x pre-arcing time t vs (time/current characteristic) The reduction of the pre-arcing time of a fuse link for a specific pre-load condition can be taken from characteristic c. Pre-arcing time = residual value factor RW x pre-arcing time t vs (time/current characteristic) 0

113 .8 Rated interrupting capacity The rated interrupting capacity of all SITOR fuse links is at least 50 k if higher values are not specified in Section Characteristics and Dimension Drawings. The data is valid for a test voltage of. x V n, 5 to Hz and 0. cos ϕ 0.. For application voltages which lie below the rated voltage as well as for rated currents of the fuse links which lie below the maximum rated current of a fuse series, the interrupting capacity lies significantly above the rated interrupting capacity..9 rc voltage V s [Û s ] When extinguishing, an arc voltage V s [Û s] occurs at the connections of the fuse link. This arc voltage can significantly exceed the connection voltage. The magnitude of the arc voltage depends on the design of the fuse link and the magnitude of the recovery voltage. It is shown in the form of a characteristic as a function of the recovery voltage V w (refer to the following diagram). s 8 Peak arc voltage Recovery voltage 8 Example: SITOR fuse link NE -0B rc voltage w D9-50b.0 Power dissipation, temperature rise When the rated current is reached, the fuse elements of SITOR fuse links have a significantly higher temperature than the fuse elements of cable protection fuse links. The power dissipation, specified in Section Characteristics and Dimension Drawings is the upper spread value if the fuse link is conducting the rated current. The power dissipation decreases at partial load corresponding to the following diagram. Power dissipation at partial load (as a % of the power dissipated at rated current) Load current (as a % of rated current ) Power dissipation at partial load The temperature rise, specified in Section Characteristics and Dimension Drawings, is valid for the specified reference point and was determined when testing the fuse link (test setup in accordance with DIN VDE 0, Part and IEC 9-). n D9-50b. Connecting fuse links in parallel and series.. Parallel circuit If several semiconductor components and therefore fuse links are connected in parallel in a branch when an internal short-circuit develops, then only the fuse link connected in series with the defective semiconductor component ruptures. This fuse link must extinguish the full connection voltage. If it is necessary increase the current, two or several fuse links connected in parallel can be assigned to a semiconductor component without having to reduce the current. The resulting clearing- I t value then increases to the square of the number of fuse links connected in parallel. Only fuse links of the same type should be used in order to avoid that the current is unevenly distributed. The arc voltage occurs at the semiconductor components, which are not located in the short-circuit loop, as blocking voltage. In order to avoid a voltage-related hazard, the arc voltage may not exceed the peak blocking voltage of the semiconductor component.

114 .. Fuse links in series There are two types of series circuits: Series circuit in the converter branch Two fused converter branches conduct the short-circuit current in series In both of these cases it can only be assumed that the voltage will be evenly distributed if the pre-arcing time of the SITOR fuse link does not exceed the values specified in the following Table. SITOR fuse links Order No. NC 0.. NC.. NC.. NC 5.. NC.. NC.. NC5 8.. NC7.. NC8.. NE 0.. NE.. NE.. NE.. NE 8.. NE.. NE.. NE.. NE 5.. NE.. NE.. NE.. NE5.. NE5.. Maximum pre-arcing time for an even voltage distribution ms NE.. 0 NE7.. NE7.. NE8 0.. NE8 7.. NE9.. NE9.. Table Maximum pre-arcing times for even voltage distribution The cooling conditions of the fuse links connected in series should be approximately the same. If faults are to be expected where the specified pre-arcing times are exceeded due to the slower increase in the current-rate-of-rise, then it can no longer be assumed that the voltage will be evenly distributed. In this case, the fuse links should be dimensioned as far as the voltage is concerned so that one fuse link alone can extinguish the full connection voltage. s far as possible a series circuit of fuse links in the branch of a converter circuit should be avoided. Instead, a single fuse link should be used with the correspondingly higher rated voltage.

115 . DC current applications When fuse links are used in DC circuits, in some cases, other data apply than those specified for C current in Section Characteristics and Dimension Drawings... Permissible DC voltage The permissible DC voltage V perm of the fuse link depends on the rated voltage V n, the time constant τ = L/R in the DC link and the prospective current I p. The permissible DC voltage is referred to the rated voltage V n and is specified as a function of time constant τ and the prospective current is a parameter (refer to the following diagram). perm n perm. DC voltage rated voltage p > 0 n p = 0 n p = 5 n Time constant = I With the exception of series NE 0.., NE 8.. perm n perm. DC voltage rated voltage p > 0 n p = 0 n p = 5 n Time constant I for the series NE 0.., NE 8.. D9-505b D9-50b.. Clearing I t value I t The clearing I t value I t depends on the voltage, the time constant τ = L/R and the prospective current I p. It is calculated using the I t value at the rated voltage V n, specified in Section Characteristics and Dimension Drawings for the particular fuse link and correction factor k. However, instead of the recovery voltage V w, that DC voltage is inserted against which the fuse link should switch. The clearing I t value thus determined applies under the following prerequisites: Time constant L/R 5 ms for I p 0 I n Time constant L/R 0 ms for I p = 0 I n The clearing I t values increase by 0 % For I p 0 I n and a time constant L/R = 0 ms For I p = 0 I n and a time constant L/R = 5 ms.. rc voltage Û s The arc voltage Û s is determined from the characteristic for the particular fuse link specified in Section Characteristics and Dimension Drawings. However, instead of the recovery voltage V w, that DC voltage is inserted against which the fuse link should switch. The arc voltage thus determined applies under the following prerequisites: Time constant L/R 0 ms for I p 0 I n Time constant L/R 5 ms for I p = 0 I n The clearing I t values increase by 0 % For I p 0 I n and a time constant L/R = 5 ms For I p = 0 I n and a time constant L/R = 0 ms -00 Permissible DC voltage of a fuse link

116 . Indicators n indicator is used to show when the fuse link has ruptured. SITOR fuse links have an indicator whose response voltage lies between 0 V (V n 000 V) and 0 V (V n >000V).. ccessories.. Fuse bases, fuse pullers Some of the SITOR fuse links can be used in the appropriate fuse bases. The matching fuse bases (single-phase and three-phase) as well as the associated fuse pullers are listed in the Tables in Section. 'ccessories' and Section Characteristics and Dimension Drawings. Note Even if the rated voltage and/or current of the fuse bases are lower than that of the associated fuse link, the values of the fuse link apply... Fused switch disconnectors, switch disconnectors with fuses Certain series of SITOR fuse links are suitable for use in fused switch disconnectors NP and NP5 (refer to Catalog NS K) and in switch disconnectors with fuses KL and KM (refer to Catalog NS K). The following points must be carefully observed when fuse links are used in switch disconnectors: The power dissipation of SITOR fuse links is higher when compared to l.v.h.b.c. cable protection fuses. This means that the permissible load current of the fuse links must in some cases be reduced (also refer to Section. ccessories. Fuse links with rated currents I n > may then not be used as overload protection, if they correspond to duty Class gr. Note ll NE... fuse links with rated currents I n from to 850 and utilization Categories gr and gs can, on the other hand, be used to provide overload protection. The rated voltage and rated insulation voltage of the switch disconnectors must correspond, as a minimum, to the voltage being used. When using NE.., NE.., NE.., NC.. and NC8.. fuse links, the switching capacity of fused switch disconnectors may not be fully utilized due to the slotted knife contacts. It is permissible to occasionally switch currents up to the rated current of the fuse links. NE.. fuse links when used in fused switch disconnectors may only be occasionally actuated and only when in a no-current condition as the fuse contact blades are subject to significant mechanical stresses. The individual fuse links are assigned to the various switch disconnectors in Section. 'ccessories'. The permissible load capacity of the fuse link and the required connection cross-section are also specified here.

117 Determining the Rated Current.5 Determining the rated current I n for ageing-free operation with cyclic loads Frequently, converters are not operated with a continuous load, but with cyclic loads which can also briefly exceed the rated converter current. The selection techniques for ageing-free operation of SITOR fuse links will now be described for four typical load types. ) Continuous load Unknown cyclic load, however with a known maximum current Cyclic load with known load duty cycle Occasional impulse load from a pre-loaded condition with unknown impulse sequence In this case the diagrams for the correction factors k u, k q, k λ, k l in Section. Rated current I n, load capacity as well as the residual value factor RW in Section. Taking into account the pre-loaded condition, residual value factor RW of the Technical data should be observed. The cyclic load factor WL is specified for every fuse link in Section Characteristics and dimension drawings. The required rated current I n of the fuse link is determined in two steps:. The rated current I n is determined using the RMS value I rms of the load current I n > I rms k u k q k λ k l WL Permissible load current I n of the selected fuse link. I n = k u x k q x k λ x k l x WL x I n ) Please contact us for cyclic loads which cannot be classified in one of the four specified typical load types.. The permissible overload duration of the current blocks exceeding the permissible fuse load current I n is checked. Pre-arcing time t vs (time/current characteristic) x residual value factor RW overload duration t k In this case, the pre-loading factor I V = rms I n and the characteristics 'Permissible overload and pre-arcing time for a pre-loaded condition' ( 0-9, characteristic a) and "Time/current characteristic" for the selected fuse link are required. If the determined overload duration is less than the associated, specified overload duration, then a fuse link with a higher rated current I n (taking into account the rated voltage V n and the permissible interrupting I t value) should be selected and the check repeated..5. Continuous load La Load current 0 Rated current I n of the fuse link I n I La k u k q k λ k l WL I La... load current of the fuse link (RMS value) Less than interrupt oper./ week: WL = More than interrupt operation per week: WL = refer to characteristic values 5-0 La Continuous load D9-507a.5. Unknown cyclic load however with a known maximum current I max La Load current 5-0 Unknown cyclic load.5. Cyclic load with known load duty cycle 5-0 max 0 Rated current I n of the fuse link I n I max k u k q k λ k l WL I max... Max. load current of the fuse link (RMS value) La Load current I rms = La La La k = n I t Lak k k = SD I La I t + I La t + I La t rms = SD I LK... Max. load current of the fuse link (RMS value) C load with known load duty cycle 'n RMS D9-508a D9-509a 5

118 .5. Occasional impulse load from a pre-loaded condition with unknown impulse sequence The required rated current I n of the fuse link is determined in two steps:. The rated current In is determined using the pre-loaded current I pre. I n > I pre k u k q k λ k l WL Permissible load current I n of the selected fuse link. I n = k u x k q x k λ x k l x WL x I n. The permissible overload duration of the impulse current I impulse pre-arcing time t vs (time/current characteristic) x residual value factor RW impulse time t impulse is checked In this case the pre-loading factor I V = rms I n and the characteristics 'Permissible overload and pre-arcing time for a pre-loaded condition' ( 9, characteristic a) and Time/current characteristic for the selected fuse link are required. If the determined overload duration is less than the required overload duration t impulse, then a fuse link with a higher rated current I n (taking into account the rated voltage V n and the permissible clearing I t value) should be selected and the check repeated.. Selection examples For a converter assembly with a circuit configuration (B) (B) C, whose rated DC current I dn = 850, fuse links should be selected which are then used as branch fuses. The selected fuse is shown for various operating modes of the converter assembly. Converter assembly data Line supply voltage V N = -ph. 00 V C 50 Hz Recovery voltage V W = 0 V = V N x (for inverter commutation faults) Thyristor T 508N (eupec company), I t value i dt = 0 x 0 s (0 ms, cold) Fuse links, natural air cooling, ambient temperature ϑ u = +5 C Connection cross-section for the fuse links, copper: 0 mm Conversion factor DC current I d /fuse load current I La : I La = I d x0.58 For the following examples, for loads, which exceed the rated DC current of the converter assembly, it is assumed that the converter assembly is dimensioned for these load conditions... Continuous, interruption-free load La 9 DC current I d = I dn = 850 I La = I d x 0.58 = 9 Selected: SITOR fuse link NE 5 (50 /000 V), WL = Clearing I t value I t = 0 x 0 x 0.5 = 9 x 0 s Test cross-section acc. to Table 0-: 00 mm The following correction factors should be applied: k u =.0 (ϑ u = +5 C) k q = (connection cross-section at both ends, 0 % of the test cross-section) k λ =.0 (valve conducting period λ = 0 ) k l =.0 (no forced air cooling) Required rated current In of the SITOR fuse link: I n I La = 9 k u k q k λ k l WL = 5 impulse La Load current D9-507 'n impulse interval 0 Condition: t interval x t impulse t interval 5 min pre D9-5070a -0 Occasional impulse load

119 .. Unknown cyclic load, however with known maximum current.. Cyclic load with known load duty La max = 5 Max. DC current I dmax = 750 Max. fuse current I max = I dmax x 0.58 = 5 Selected: SITOR fuse link NE -0B (50 /000 V), WL = Clearing I t value I t = 0 x 0 x 0.5 = 8 x 0 s Test cross-section acc. to Table 0-: 00 mm The following correction factors should be applied: k u =.0 (ϑ u = +5 C) k q = (connection cross-section at both ends, 0 % of the test cross-section)) k λ =.0 (valve conducting period λ = 0 ) k l =.0 (no forced air cooling) Required rated current I n of the SITOR fuse link: I n I max = 5 k u k q k λ k l WL = 9 D9-507 La La = 9 La= 580 ' n RMS La= 90 The following correction factors should be applied: k u =.0 (ϑ u = +5 C) k q = (connection cross-section at both ends, 50 % of the test cross-section) k λ =.0 (valve conducting period λ = 0 ) k l =.0 (no forced air cooling). Required rated current I n of the SITOR fuse link: I n I rms = 7 k u k q k λ k l WL = Permissible load current I n of the selected fuse link. I n = k u x k q x k λ x k l x WL x I n =.0 x x.0 x.0 x.0 x 50 =. The permissible overload duration of the current blocks which exceed the permissible fuse load current I n ' is checked Pre-load factor: I V rms 7 = = = 0.7 I n Residual value factor RW:for V = 0.7 from characteristic a ( 9, frequent impulse/load duty cycle currents) RW = 0. Current block I La : Current block I La : = 7 = 0 s RMS value of the load current I rms = = 7 0 Selected: SITOR fuse link NE (50 /000 V), WL = Clearing I t value I t = 75 x 0 x 0.5 = 9 x 0 s Test cross-section acc. to Table 0-: 0 mm D9-507a DC current: I d =00 t = 0s I d = 500 t = 0 s I d =000 t = 0s I d = 0 t = 0s Fuse current: I La =00 x 0.58 = 9 I La = 500 x 0.58 = 90 I La =000 x 0.58 = 580 Pre-arcing time t vs : 0 s (from the time/current characteristic for NE ) t vs x RW = 0 s x 0. = s > t Pre-arcing time t vs : 00 s (from the time/current characteristic for NE ) t vs x RW = 00 s x 0. = 0 s > t 7

120 .. Occasional impulse load from a pre-loaded condition with known impulse sequence La impulse = 05 DC current: I dpre =700 I dimpulse = 500 t impulse =8s impulse = 8 s Fuse current: I pre = I dpre x 0.58 = 0 I impulse = I dimpulse x 0.58 = 05 pre = 0 D9-507a The conditions t interval t impulse and t interval 5 min are fulfilled. Selected: SITOR fuse link NE (50 /000 V), WL = Clearing I t value I t = 0 x 0 x 0.5 = 9 x 0 s Test cross-section acc. to Table 0-: 00 mm The following correction factors should be applied:: k u =.0 (ϑ u = +5 C) k q = (connection cross-section at both ends, 0 % of the test cross-section) k λ =.0 (valve conducting period λ = 0 ) k l =.0 (no forced air cooling). Required rated current I n of the SITOR fuse link: I n I pre = 0 k u k q k λ k l WL = 7 Permissible load current I n of the selected fuse link: I n = k u x k q x k λ x k l x WL x I n =.0 x x.0 x.0 x.0 x 50 = 50. The permissible overload duration of the current blocks, which exceed the permissible fuse load current I impulse is checked Pre-loading factor : I V pre 0 = = = 0.78 I n 50 Residual value factor RW:for V = 0.78 from characteristic a ( 9, frequent impulse/load duty cycle currents) RW = 0.8 Impulse current I impulse : Pre-arcing time t vs : 0 s (from the time/current characteristic for NE ) t vs x RW = 0 s x 0.8 = 9.8 s > t impulse 8

121 Fuse Monitoring The following fuse monitoring devices represent a low-ohmic bypass (circuit-breaker). These monitoring devices are intended for semiconductor protection fuse links which are only used to protect semiconductor components as either phase or branch fuses and are not intended to be used to bring the converter into a no-voltage condition. NP and NP5 fuse switch disconnectors are available with integrated RV.. circuit-breakers (up to 90 V) or with electronic fuse monitoring (up to 500 V). For more detailed information, refer to Catalog NS K Section. ccording to DIN VDE 000, monitoring devices for fuse links which are also intended to simultaneously disconnect the voltage, may only be used if the monitoring circuit is positively disconnected together with the main circuit. When monitoring cable protection fuse links, fused switch disconnectors with mounted circuit-breaker are used as listed in Catalog NS K..7 Circuit-breakers.7. Mode of operation Each of the phase fuses to be monitored is connected in parallel to a circuit-breaker path (refer to the following diagram). When the fuse link ruptures, the circuit-breaker trips and signals that the fuse has ruptured. L L L Converter 5 D9-5077b.7. pplications RV circuit-breakers (refer to Catalog NS K) are used to monitor phase fuses for connection voltages up to 90 V. circuit-breaker is not suitable to monitor fuses of converters where inverter commutation faults can occur or for those converters where, when a fault occurs, DC voltages >50 V/pole can be fed back into the line supply. In the DC circuit of a converter, fuse links cannot be monitored using RV circuit-breakers Monitoring phase fuses using RV circuit-breaker 9

122 Terminology This glossary explains the most important terms when using fuse links to protect semiconductor components. dditional definitions are included in DIN VDE 0, Part and Part 0. Let-through current I c The let-through current I c is the highest instantaneous current value which is reached when a fuse ruptures. Rated interrupting capacity The rated interrupting capacity specifies the highest prospective short-circuit current I p which a fuse link can interrupt at.x rated voltage and under specified conditions. Rated frequency The rated frequency is the frequency for which the fuse link is designed regarding the power dissipation, current, voltage, characteristics and interrupting capacity. Rated voltage V n The rated voltage is the voltage stamped on the fuse and which is defined according to the test conditions and the operating voltage limits. For SITOR fuse links, the rated voltage is always an RMS C voltage. Rated current I n The rated current of a fuse link is the current which is stamped on the fuse link and which the fuse can conduct under the specified conditions (refer to Section Technical information ) without having a negative impact on the function of the fuse. Utilization Category The utilization Category is a designation of the Function Class of a fuse link in conjunction with the element to be protected. Utilization Category gs: Full range semiconductor protection fuse for use in fused switchgear and switching devices Utilization Category gr: Full range semiconductor protection Utilization Category : Partial range semiconductor protection Let-through current characteristic The let-through current characteristic specifies the let-through current at 50 Hz as a function of the prospective current. Function Class The function class designates the capability of a fuse link to conduct specific currents without damage and to interrupt overcurrents within a specific range (range of the interrupting capacity). Function Class a Partial range fuses: Fuse links which conduct currents up to at least their rated current and can interrupt currents above a certain multiple of their rated current up to the rated interrupting capacity. Function Class g Full range fuses: Fuse links which can continually conduct currents up to at least their rated current and can interrupt currents from the smallest pre-arcing current up to the rated interrupting capacity. 0

123 I t value The I t value (Joule integral) is the integral of the square of the current over a specified time interval: The I t values for pre-arcing (I t s ) and for clearing (I t _ sum of the pre-arcing and arcing I t value). Power dissipation The power dissipation is the power which is dissipated in a fuse-link which is conducting its rated current under specified conditions. rc voltage Û s The arc voltage is the highest voltage which occurs at the fuse link connections during the arcing time. I t = i dt Residual value factor RW The residual value factor is a reduction factor which is used to determine the permissible load duration of the fuse link with currents which exceed the permissible load current I n (refer to the rated current I n ). t t 0 Prospective short-circuit current I p The prospective short-circuit current is the RMS value of the C current component at the line frequency or the value of the DC current which can be expected in the case of a short-circuit which occurs after the fuse if it is considered that the fuse will be replaced by an element with an impedance which can be neglected. Virtual time t v The virtual time is the time which is obtained if the I t value is divided by the square of the prospective current: i dt t v = I p The virtual pre-arcing time t vs is specified in the time/current characteristic. Cyclic load factor WL The cyclic load factor is a reduction factor for the rated current for cyclic load states. Recovery voltage V w The recovery voltage (RMS value) is the voltage which is present at the connections of a fuse link after the current has been interrupted. Time/current characteristic The time/current characteristic specifies, for specific operating conditions, the virtual time (e.g. the pre-arcing time) as a function of the prospective current.

124 Index Page Page Page Numerics NC NC.. 78 NC.. 80, 8 NC NC.. 8 NC..- NC5 5 9 NC NC NC NE NE NE..-0 NE NE..-0 NE NE..-0 NE..- 8 NE..- 5 NE NE. 0 NE., NE.. NE NE.. NE.. 58 NE NE..-0B 5 NE..-B 90 NE 7 5 NE 7-90 NE5.. 8 NE5-8 NE NE.. 9 NE NE7.. 7 NE7.. 7 NE NE8 7..-, 8 NE9 0-9 NE NE NE9.. 7 ccessories ccessories for cylindrical fuses 0 ccessories for l.v.h.b.c. fuses ctual clearing time 09 pplications rc I t value 08 rc voltage Û s,, B B 07 B 07 C Characteristics Clearing I t value 08, Continuous interruptfree load Continuous load 5 Converter circuit 07 Correction factor k 08 Correction factor ambient temperature 05 Correction factor connection cross-section 05 Correction factor valve conducting period 0 Correction factor increased air cooling 0 Cyclic load factor 0 Cyclic load factor WL 05, Cyclic load with known load duty cycle 5, 7 D DC current applications Defining the rated current 5 Dimension drawings 98 Double--pulse center-tap circuit 07 E Environmental friendly recycling External short circuit F File number Function Class 0 Function Class a 0 Function Class g 0 Fuse bases Fuse currents for converter operation 07 Fuse puller Fused switch disconnector G Terminology 0 Guide number I I t value 08, l.v.h.b.c./h.v.h.b.c. Recycling Important notes Important information Indicator Influence of the power factor 09 Internal short-circuit Inverter commutation faults Inverter operation 0 L Load capacity 0 Let-through current I c 0, 0 Let-through current characteristic 0 Liability exclusion 7 M M 07 M 07 M 07 M. 07 M 07 Maximum clearing time

125 Page Page O Occasional impulse load, 8 Ordering and engineering data 0 P Parallel circuit Permissible DC voltage Possible arrangements Power dissipation, Properties Prospective short-circuit current I p R Rated frequency 0 Rated interrupting capacity, 0 Rated voltage V n 0, 0 Rated current I n 0, 0 Rectifier operation 0 Recovery voltage 08 Recovery voltage U w Recycling Regulations Residual value factor RW 0, RMS value of the branch current 07 RMS value of the phase current 07 T Taking into account the pre-loading condition 0 Taking into account the recovery voltage 08 Technical information 0 Temperature rise Test cross-sections 05 Three-pulse center-tap circuit 07 Time/current characteristic Time/current characteristics 09 Two-pulse bridge circuit 07 Two-pulse center-tap circuit 07 U Unknown cyclic load 5, 7 Updated information Utilization category 0 V Virtual clearing time 09 Virtual time t v W W 07 S Selection examples Series circuit Single-phase bi-directional circuit 07 Single-pulse center-tap circuit 07 SITOR fuse links 0, SITOR fuse links for special applications, 88 Six-pulse bridge circuit 07 Six-pulse center tap circuit 07 Switch disconnector with fuses

126 Notes

127

128 You can order by fax +9/(0) Info Service CD/Z09 More Information. (simply mark and order by fax) Sentric NP fuse switch disconnector Sentric K load-break switches Please send me the information to the following address: Company/Dept. Name Function Street Postal code/city The information provided in [this brochure/product catalog, etc.] contains merely general descriptions or characteristics of performance which in case of actual use do not always apply as described or which may change as a result of further development of the products. n obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract. Industry sector Telephone Fax I would like my regional sales person to call me Schutzgebühr,50 Subject to change without prior notice 05/0 Order No. E P0-X-700 Dispo 70 D5 CPSI.5..0 KG Siemens G utomation and Drives Low Voltage Controls and Distribution P. O. Box 0, D-9050 Erlangen