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SIGMA D

The SIGMA D is a combined directional short-circuit and directional earth fault indicator for medium-distribution networks. The device is current transformer powered, thus no auxiliary supply is required.

Directional Fault Indicator

Product Features

  • CT powered directional short-circuit and directional earth fault indicator for all networks and types of neutral earthing
  • Clear signalling of fault direction
  • Detection of fault direction by capacitive voltage coupling
  • Easy and flexible parameter setting via DIP switch and USB
  • Event memory for fault evaluation
  • LED status display, multicolour

The SIGMA D is a combined directional short-circuit and directional earth fault indicator for medium-distribution networks. The device is current transformer powered, thus no auxiliary supply is required.

Phase selective current and voltage measurements as well as phase angle measurements can be done via USB cable and SIGMA Explorer software. The voltage information will be taken from the integrated voltage detecting system, either WEGA 1.2 C, WEGA 2.2 C or WEGA 1.2 vario. Optional the voltage information can be taken from the HR interface or capacitive insulators.

 

Equipment set:

  • 1 Display unit
  • 3 single-phase current sensors

Product

Note Item Number

Display unit

Item Number37-6000-001


Technical Data

Technical Data

SIGMA D

Short-circuit indicator

Earth fault indicator

Detection of short-circuit current direction

Detection of earth fault current direction

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

IE> Earth fault trip current

DIP: off, 20, 40, 60, 80, 100, 120, 160 A
SW: 20 – 1,000 A (1 A-steps)

tIE> 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)
3 A – 15 A 5 %, 1 A (without auxiliary supply)

Indication

LED

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

Relay 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

Parameter setting

  • USB 2.0 interface, connection to the application program
  • DIP switch on the device

Power supply

  • Current transformers,
  • Long-life lithium cell, lifetime ≥20 years

Housing

Polycarbonate, IP40 (plug-in housing)

Temperature range

-30 to +70 °C

Accessories

WEGA 1.2 C

WEGA 1.2 C

base type without C2

more...
51-1250-001

WEGA 2.2 C

WEGA 2.2 C

more...
51-2250-001

WEGA 1.2 C vario

WEGA 1.2 C vario

more...
51-1300-001

Current Sensors

Short-circuit Current Sensor

  • Split-core cable-type current sensor
  • for retrofit on insulated cables
  • for short-circuit indicator types: SIGMA and ComPass
  • for conductor 15 – 55 mm Ø
  • cable length 3 m

more...
49-6024-001

External Signal Lamps

External Signal Lamp

  • with 3 LEDs (red)
  • 5 m connection cable, for permanent contact, with battery

more...
49-0702-005
External Signal Lamp

  • “bicolour“ with 3 LEDs (red/green)
  • 3 m connection cable, with battery

more...
49-0706-001
External Signal Lamp

  • “bicolour“ for connection of fibre optic cable, 1 LED (red/green)
  • 2 m connection cable, with battery

more...
49-0704-001

Wall-mounted Housings

Wall-mounted housing including earthing bar

  • 290 x 74 x 200 mm (W x H x D)

more...
V49-9001-007-001
Wall-mounted housing including earthing bar

  • 125 x 175 x 125 mm (W x H x D)

more...
V49-9001-004-001
Wall-mounted housing

  • 125 x 75 x 125 mm (W x H x D)

  • Bottom cable entry

more...
49-9001-001
Wall-mounted housing

  • 125 x 75 x 125 mm (W x H x D)

  • Rear cable entry

more...
49-9001-002

Other

Disassembly clip

Disassembly clip for retracting plug-in housings

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040401-0008
Spring clip

Spring clip suitable for 2 mm front plate thickness (standard)

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040804-0009
Spring clip

Spring clip suitable for 3 mm front plate thickness

more...
040804-0010

Dimensioned Drawings

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Contact

Watch list