SIGMA D++ / SIGMA D+ / SIGMA D Directional Fault Indicator
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1 SIGMA D++ / SIGMA D+ / SIGMA D Directional Fault Indicator Product Features CT powered directional short-circuit and directional earth fault indicator for all distribution networks / neutral point treatments Earth fault detection with up to 5 different earth fault detection methods, also in combination Clear indication and signalling of fault direction Fully automatic voltage calibration Easy and flexible parameter setting via DIP switch or USB port Event memory for fault evaluation Multicolour LED status display Remote signalling via freely programmable relays SIGMA Explorer Software: Commissioning and parameterisation via front accessible USB port Special features of SIGMA D++ Only 3 single-phase current sensors needed for all earth fault detection methods Wide-range power supply 24 V to 230 V AC/DC The SIGMA D series are combined directional short-circuit and directional earth fault indicators for medium voltage distribution networks. The devices are current sensor powered, thus no auxiliary supply is required. For the current measurement single-phase current sensors resp. a summation current sensor are required. The voltage information will be taken from an integrated voltage detecting system, either WEGA 1.2 C, WEGA 2.2 C or WEGA 1.2 C vario. Optionally, the voltage information can be taken from an HR interface or capacitive insulators. The SIGMA D+ and SIGMA D++ provide additional earth fault detection methods for compensated and isolated neutral networks. The calculation or measurement of the summation current is chosen via DIP switches for all earth fault detection methods. The variants differ in regard of the transient earth fault method. SIGMA D+ For the transient earth fault method with the SIGMA D+ a summation current sensor is mandatory, auxiliary supply is optional. SIGMA D++ For the transient earth fault method only 3 single-phase current sensors are needed, but auxiliary supply is mandatory. The connection of a summation current sensor is optional. The auxiliary supply is not needed if only the cos φ or sin φ method without the transient earth fault method is used for the fault direction indication. SIGMA D++ SIGMA D+ SIGMA D
2 SIGMA D++ / SIGMA D+ / SIGMA D Directional Fault Indicator Technical Data SIGMA D SIGMA D+ SIGMA D++ Detection of short-circuit and earth fault direction Earth fault detection methods Earth short-circuit Transient, earth short-circuit, cos φ or sin φ I>> Short-circuit trip current DIP: 200, 300, 400, 600, 800, 2,000 A (fixed settings), self-adjustment SW: 50 2,000 A (1 A steps) ti>> Response delay DIP: 40, 80 ms; SW: 40 ms 60 s I E> Earth fault trip current DIP: off, 20, 40, 60, 80, 100, 120, 160 A; SW: 20 1,000 A (1 A steps) ti E> Response delay DIP: 80, 160 ms; SW: 40 ms 60 s Accuracy 3 % (0 630 A, resolution 1 A) 5 % (630 1,500 A) 10 % (1,500 2,000 A) I ET > Transient method, trip current A A I EP > Active current, cos φ trip current A I EQ > Reactive current sin φ, trip current A ti EP > / ti EQ > Response delay 40 ms 60 s Indication LED fault direction arrows red / green Reset Manual reset Remote reset Automatic time reset: DIP: 2, 4, 8, 24 h; SW: 1 min 24 h Current and voltage restoration Remote signal / Communication 4 potential-free, freely programmable relay contacts Parameter setting USB 2.0 interface, connection to software Via DIP switch Remote contact 4 permanent or momentary contacts (1 s), NC or NO (adjustable) Contact capacity: 230 V AC / 1 A / 62.5 VA max.; 220 V DC / 1 A / 60 W max. Voltage calibration Manual / automatic Current sensor powered Internal power supply Long-life lithium cell; shelf life 20 years External power supply (auxiliary supply) 24 V AC / V DC optional Housing Polycarbonate, IP40 (plug-in housing) Temperature range -30 to +70 C Dimension drawing see on page 49, M V AC/DC optional (required for transient method) Equipment set SIGMA D SIGMA D+ SIGMA D++ 1 Display unit (plug-in housing) 1 Display unit (plug-in housing) 1 Display unit (plug-in housing) 3 Single-phase current sensors 3 Single-phase current sensors 3 Single-phase current sensors 1 Summation current sensor 1 Summation current sensor (required for transient method) (optional) SIGMA D SIGMA D+ SIGMA D++ Display unit in plug-in housing Current sensors see on page 30 and 31 Accessories see on page 32 and 33 External signal lamp see on page 33
3 Current Sensors Type SIGMA and ComPass Single-phase current sensors for new installation on bushings ABB / EATON Driescher Lucy Electric Ormazabal Schneider Electric Siemens Switchgear Manufacturer 1) Type ABB SafeLink, SafePlus, SafeRing 3x or 3x Driescher MINEX, MINEX C, G.I.S.E.L.A. 3x * EATON XIRIA 3x or 3x Lucy Electric AegisPlus 3x Ormazabal GA, GAE, GE 3x Schneider Electric RM6 3x Schneider Electric FBX 3x * Siemens 8DJH (module transformer) 2x , 1x ) For screened connectors only. Insulation level: 0.72 / 3 kv. * Without retaining plates. Please contact the manufacturer for retaining plates. Single-phase current sensors for retrofit on insulated cables Conductor ø [mm] Cable Length [m] Split-core cable-type current sensor Split-core cable-type current sensor
4 Current Sensors Type SIGMA and ComPass Earth fault current sensors for installation on insulated cables for short-circuit and earth fault indicators type SIGMA D+ / D++, ComPass B Inner ø [mm] Cable Length [m] Split-core summation sensor Split-core summation sensor Voltage sensors for installation in connector sets for short-circuit and earth fault indicators type ComPass B 2.0, ComPass BS for T connector sets 3 voltage sensors, long cone; shielded 2 pole cable with connector, 3.5 m; incl. connecting terminal and termination resistor Nexans: (K) 400TB Cellpack: CTS Südkabel: SEHDT 13, SEHDT voltage sensors, short cone; shielded 2 pole cable with connector, 3.5 m; incl. connecting terminal and termination resistor Further cable lengths are available on request. Nkt: CB-24, CC-24 Raychem: RSTI-58xx, RSTI-CC-58xx Adapter and voltage sensors for direct installation on A cone in the switchgear or on the transformer for short-circuit and earth fault indicators type ComPass B 2.0, ComPass BS voltage sensors with adapters for A cones; shielded 2 pole cable with connector, 6 m; incl. connecting terminal and termination resistor
5 Accessories for Short-Circuit and Earth Fault Indicators WEGA 1.2 C Voltage interface for directional indicator types ComPass B, ComPass B 2.0, ComPass BS 2.0, SIGMA D, SIGMA D+, SIGMA D++ WEGA 1.2 C see on page 67 WEGA 2.2 C see on page 69 WEGA 1.2 C vario see on page 68 HR interface cable to match specific xx 1) switchgear types for ComPass B HR interface cable to match specific switchgear types for SIGMA D / D + / D xx 1), ComPass B 2.0 / BS 2.0 Set of connection cables xx 2) (ComPass WEGA X.2 C) Set of connection cables (SIGMA D / D + / D xx 2) WEGA X.2 C ComPass B 2.0 / BS 2.0 WEGA X.2 C) WEGA 2.2 C WEGA 1.2 C vario 1) For a customised application the following data are required: Switchgear type and compartment Operating voltage of the installation (Vnom) Cable length of the HR interface cable Short-circuit current of HR socket Current measured via HO-M adapter of HR socket 2) For a customised application the following data are required: Cable length of the connection cables Connection to WEGA (AMP or flat connector) Interface cable (e. g.) Installation system for ComPass, SIGMA D, SIGMA D+, SIGMA D++ Tablet for parameter setting during installation or monitoring, incl. power supply and USB cable Installation system Accessories for plug-in housings Disassembly clip Disassembly clip ComPass B 2.0 / BS Spring clip suitable for 2 mm front plate thickness (standard) Spring clip suitable for 3 mm front plate thickness Disassembly clip
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