OTEC Miniature Circuit Breakers (MCB) OTEC Miniature Circuit Breakers (MCB) OTEC Miniature Circuit Breakers (MCB) Areas of Application

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1 Miniature Circuit Breakers Areas of Application Miniature circuit breakers (MCBs) of the N-System primarily protect cables and conductors against overload and short circuit. Thus, they also protect electrical equipment against overheating according to standard IEC Under certain conditions, MCBs can also protect against shock currents caused by excessive touch voltage due to insulation failure according to relevant standard. Further, due to the fixed rated current settings of MCBs, it is also possible to protect motors in a limited form. For the respective application, there are different tripping characteristics available which will be individually described in the leaflets. The standards EN 0898, DIN VDE 041 Part 11 and IEC 0898 form the basis for the design and approval of the MCB s. For applications in industry and in system and plant engineering where MCBs of the N-System are mostly used, additional components are available, such as shunt trips, undervoltage releases, fault signal contacts, auxiliary switches, RCCB modules as well as add-on accessories such as busbar systems and mounting parts. Functional Design, Mode of Operation MCBs of the N-System operate using a delayed overload current/ time-dependent thermal release (thermal bimetal) for low overcurrents and an instantaneous electromagnetic release for higher overload and short-circuit currents. The special contact materials used assure a long service life and offer a high level of protection against contact welding. MCBs of the N-System significantly limit the let-through current when a fault occurs due to the ultra-fast contact separation and the quick quenching of the arc in the arc-chamber. Thus, generally, they fall below the permissible limiting / t values of energy limiting class 3 by 50%. This guarantees excellent selectivity with the upstream overcurrent protective devices. Iskra Zaščite, d.o.o., Surge Protection Systems, Engineering and Cooperation Published by: Iskra Zaščite, d.o.o., Februar 014 Stegne 3 A, SI-1000 Ljubljana, Slovenia We reserve the right to introduce changes in performance, dimensions and materials in the course of technical progress. Phone: Fax: sales@iskrazascite.si No part of this work, nor of the information laid down herein and/or derivable herefrom and/or developed in connection herewith, may be reproduced or used in any form or by any means. Legal action will be taken against infringements. This publication replaces the previous edition. Copyright All rights reserved.

2 Miniature Circuit Breakers Areas of Application Miniature circuit breakers (MCBs) of the N-System primarily protect cables and conductors against overload and short circuit. Thus, they also protect electrical equipment against overheating according to standard IEC Under certain conditions, MCBs can also protect against shock currents caused by excessive touch voltage due to insulation failure according to relevant standard. Further, due to the fixed rated current settings of MCBs, it is also possible to protect motors in a limited form. For the respective application, there are different tripping characteristics available which will be individually described in the leaflets. The standards EN 0898, DIN VDE 041 Part 11 and IEC 0898 form the basis for the design and approval of the MCB s. For applications in industry and in system and plant engineering where MCBs of the N-System are mostly used, additional components are available, such as shunt trips, undervoltage releases, fault signal contacts, auxiliary switches, RCCB modules as well as add-on accessories such as busbar systems and mounting parts. Functional Design, Mode of Operation MCBs of the N-System operate using a delayed overload current/ time-dependent thermal release (thermal bimetal) for low overcurrents and an instantaneous electromagnetic release for higher overload and short-circuit currents. The special contact materials used assure a long service life and offer a high level of protection against contact welding. MCBs of the N-System significantly limit the let-through current when a fault occurs due to the ultra-fast contact separation and the quick quenching of the arc in the arc-chamber. Thus, generally, they fall below the permissible limiting / t values of energy limiting class 3 by 50%. This guarantees excellent selectivity with the upstream overcurrent protective devices. Iskra Zaščite, d.o.o., Surge Protection Systems, Engineering and Cooperation Published by: Iskra Zaščite, d.o.o., Februar 014 Stegne 3 A, SI-1000 Ljubljana, Slovenia We reserve the right to introduce changes in performance, dimensions and materials in the course of technical progress. Phone: Fax: sales@iskrazascite.si No part of this work, nor of the information laid down herein and/or derivable herefrom and/or developed in connection herewith, may be reproduced or used in any form or by any means. Legal action will be taken against infringements. This publication replaces the previous edition. Copyright All rights reserved.

3 Technical Data Series 1X X Standards EN EN Tripping characteristic B, C B, C, D Nominal current A 1-3 A 1-3 A Calibration temperature C Number of poles 1, 1+N,, 3, 3+N, 4 1, 1+N,, 3, 3+N, 4 Neutral pole protected Nominal voltage Un AC 1P 30/ 30/ 1P+N P 3P, 3P+N, 4P Nominal voltage Un DC 1P P (in series) Short Circuit Capability ka 10 Frequency Hz 50/0 50/0 Max service voltage 45/430 45/430 53/10 53/10 Min service voltage Selective class (EN ) 3 3 Pollution degree Impulse withstand test voltage kv Insulation resistance MΩ Power losses (min/max) W 1,/ 1,/ Endurance (electrical, mechanical) Protection degree (outside/inside) IP0/IP40 IP0/IP40 Self-extinguishing degree (to UL 94) V V Operating temperature C -5/+55-5/+55 Storage temperature C -40/+55-40/+55 Rigid min/max mm 1/5 1/5 Terminal capacity Flexible min/max mm 1/5 1/5 Tightening torque Nm Auxiliary contacts no Accessories Shunt trip no Undervoltage relay no Dimensions (H x D x W) 85 x 8 x W mm/mod 17,8 17,8 Weight g Package box (poles) 1 1 Approvals SEMKO SEMKO

4 Features High rated breaking capacity up to A according to EN Excellent current limiting and selectivity Tripping characteristics B, C and D Terminals are safe from finger touch and touch by the back of the hand Combined terminal allows busbar and feeder cable to be simultaneously connected Uniform additional components, quick mounting using snap-on and snap-in mechanism on site Handle locking device effectively prevents unauthorized operation of the handle Discover these Advanced Features Available in one, two, three and four poles with B, C and D trip characteristics. Short circuit rating to 10 ka (@50 V AC and 40 Y/77 V AC for multi-pole). Arc Chutes quickly extinguish arcs generated by the opening of the contacts under normal or high fault conditions. Choose box terminals or terminals for ring-tongue connectors. Breakers install on standard DIN-rail. Colour coded indicator provides breaker status for easy troubleshooting. Bimetal trip assembly provides reliable overload protection through a broad range of ambient temperatures. Breaker information printed on the front of the device for quick identification. Tripping Characteristic B Tripping Characteristic C Tripping Characteristic D Cable and line protection mainly in residential buildings, proof regarding shockhazard. The tripping range has been matched to applications involving equipment generating significant pulses (transformers, solenoid valves). 4

5 Technical Data Features Series Standards Tripping characteristic 1X X EN EN B, C B, C, D Nominal current A 1-3 A 1-3 A Calibration temperature C , 1+N,, 3, 3+N, 4 1, 1+N,, 3, 3+N, 4 Number of poles Neutral pole protected Nominal voltage Un AC Nominal voltage Un DC 1P 30/ 30/ 1P+N P 3P, 3P+N, 4P 1P P (in series) Uniform additional components, quick mounting using snap-on and snap-in mechanism on site Handle locking device effectively prevents unauthorized operation of the handle /430 53/10 53/ Selective class (EN ) 3 3 Pollution degree Impulse withstand test voltage kv Insulation resistance MΩ Power losses (min/max) W 1,/ 1,/ Endurance (electrical, mechanical) Protection degree (outside/inside) IP0/IP40 IP0/IP40 V V Self-extinguishing degree (to UL 94) Operating temperature C -5/+55-5/+55 Storage temperature C -40/+55-40/+55 Rigid min/max mm 1/5 1/5 Flexible min/max mm 1/5 1/5 Tightening torque Nm Auxiliary contacts no Shunt trip no Undervoltage relay no mm/mod 17,8 17,8 g SEMKO SEMKO High Test Current Test Current 1,45 x In 48 45/430 Low 1,13 x In 48 Standard B Max service voltage Approvals Combined terminal allows busbar and feeder cable to be simultaneously connected Short circuit rating to 10 ka (@50 V AC and 40 Y/77 V AC for multi-pole). 50/0 box (poles) Tripping Characteristic 50/0 Package Terminals are safe from finger touch and touch by the back of the hand Hz Weight Tripping characteristics B, C and D D Frequency (H x D x W) 85 x 8 x W Thermal Relay/Test Currents Available in one, two, three and four poles with B, C and D trip characteristics. 10 Dimensions Excellent current limiting and selectivity Accessories High rated breaking capacity up to A according to EN C ka Terminal capacity Discover these Advanced Features Short Circuit Capability Min service voltage Description IEC 0898 EN ,13 x In 1,45 x In 1,13 x In 1,45 x In Electromagnetic Relay/Test Currents Tripping Time 3 A In (t) 15 A In (t) >1h >h <1h <h >1h >h <1h <h >1h >h <1h <h Hold Trips at the Latest at Tripping Time t 3 x In 0,1 s 5 x In 5 x In < 0,1 s 0,1 s 10 x In 10 x In < 0,1 s 0,1 s 0 x In < 0,1 s Tripping characteristics Arc Chutes quickly extinguish arcs generated by the opening of the contacts under normal or high fault conditions. Choose box terminals or terminals for ring-tongue connectors. Breakers install on standard DIN-rail. Colour coded indicator provides breaker status for easy troubleshooting. Bimetal trip assembly provides reliable overload protection through a broad range of ambient temperatures. Tripping Characteristic B Breaker information printed on the front of the device for quick identification. Tripping Characteristic C Tripping Characteristic D In 0 C 10 C 0 C 30 C 40 C 50 C 0 C ,1 0,9 0,9 0,88 0 1,1 0,9 0,9 0,88 5 1,1 0,9 0,9 0,88 3 1,13 0,9 0,9 0, ,15 1,05 0,95 0, ,15 1,05 0,95 0,85 3 1,1 1,11 1,05 0,95 0,89 0,84 Multiple tripping performances at an ambient temperature of 30 C Overall & Installation Dimensions Cable and line protection mainly in residential buildings, proof regarding shockhazard. The tripping range has been matched to applications involving equipment generating significant pulses (transformers, solenoid valves). 4 Front view Side view 5

6 Miniature Circuit Breakers Areas of Application Miniature circuit breakers (MCBs) of the N-System primarily protect cables and conductors against overload and short circuit. Thus, they also protect electrical equipment against overheating according to standard IEC Under certain conditions, MCBs can also protect against shock currents caused by excessive touch voltage due to insulation failure according to relevant standard. Further, due to the fixed rated current settings of MCBs, it is also possible to protect motors in a limited form. For the respective application, there are different tripping characteristics available which will be individually described in the leaflets. The standards EN 0898, DIN VDE 041 Part 11 and IEC 0898 form the basis for the design and approval of the MCB s. For applications in industry and in system and plant engineering where MCBs of the N-System are mostly used, additional components are available, such as shunt trips, undervoltage releases, fault signal contacts, auxiliary switches, RCCB modules as well as add-on accessories such as busbar systems and mounting parts. Functional Design, Mode of Operation MCBs of the N-System operate using a delayed overload current/ time-dependent thermal release (thermal bimetal) for low overcurrents and an instantaneous electromagnetic release for higher overload and short-circuit currents. The special contact materials used assure a long service life and offer a high level of protection against contact welding. MCBs of the N-System significantly limit the let-through current when a fault occurs due to the ultra-fast contact separation and the quick quenching of the arc in the arc-chamber. Thus, generally, they fall below the permissible limiting / t values of energy limiting class 3 by 50%. This guarantees excellent selectivity with the upstream overcurrent protective devices. Iskra Zaščite, d.o.o., Surge Protection Systems, Engineering and Cooperation Published by: Iskra Zaščite, d.o.o., Februar 014 Stegne 3 A, SI-1000 Ljubljana, Slovenia We reserve the right to introduce changes in performance, dimensions and materials in the course of technical progress. Phone: Fax: sales@iskrazascite.si No part of this work, nor of the information laid down herein and/or derivable herefrom and/or developed in connection herewith, may be reproduced or used in any form or by any means. Legal action will be taken against infringements. This publication replaces the previous edition. Copyright All rights reserved.