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Sigma F+E 3 2.0

The Sigma F+E 3 2.0 device is a combined short-circuit and earth fault indicator. It is designed to detect, display and remotely indicate short-circuit and earth faults in medium voltage distribution networks.

Short-Circuit and Earth Fault Indicator

Product Features

  • Short-circuit and earth fault detection from 3 single-phase current sensors
  • Phase-selective fault indication
  • Trip current values: load-dependent self-adjustment or fixed values
  • Single and double flash mode for operation in radial and ring networks
  • With auxiliary supply and capacitor storage available in AC/DC version

Your advantages

  • No false trips due to higher harmonics
  • Highly visible LED fault indication
  • Detection of high-impedance earth faults
  • Clear fault type indication via LED
  • Retrofit ready for earth and short-circuit indicators with monitoring/control and fault direction function

The SIGMA F+E 3 2.0 device is a combined short-circuit and earth fault indicator. It is designed to detect, display and remotely indicate short-circuit and earth faults in medium voltage distribution networks.

The current is measured via three single-phase current sensors. This allows phase-selective fault detection and indication.
There are two response criteria for short-circuit detection, fixed response values with response delay or auto-adjustment based on load current.

If the current for the selected response criterion – fixed value or self-adjustment – is exceeded, the fault-affected phase will be indicated by a bright flashing LED and remote contact will be activated. A double flashing LED signals a second fault that has occurred within the reset time, e. g. by an automatic reclose attempt and the remote contact will be reactivated.
For testing and commissioning purposes, the trip current values can be reduced to 10 A without changing the DIP switch settings.

Two additional LEDs display the fault type. The red LED I>> signals a short-circuit, the yellow LED IE> signals an earth fault. The L1, L2 and L3 indication fields display the fault-affected phase. In addition, phase-selective (L1, L2, L3) or group-selective (I>>, IE>, I>> and IE>) remote signalling is possible.

Sigma F+E 3  2.0 AC/DC
These versions can be connected to auxiliary supply. If the auxiliary power drops out in the event of a fault, the LED indicator can operate using a back-up capacitor for up to 8 hours.

 

Equipment set:

  • 1 display unit
  • 3 single-phase current sensors

Technical Data

Technical Data

SIGMA F+E 3 2.0

Short-circuit indicator

Earth fault indicator

Earth fault detection method Earth short-circuit

I>> Short-circuit trip current

200, 300, 400, 600, 800, 1,000 or 2,000 A, fixed setting

Self-adjustment as a function of the operating current (IL):

IL < 100 A ⇒ I>> = 400 A, IL > 100 A ⇒ I>> = 4 x IL, I>> max.= 2,000 A 2,000 A

tI>> Response delay

40, 80, 200, 300 ms

IE> Earth fault trip current

20, 40, 60, 80, 100, 120, 160 A

tIE> Response delay

60, 80, 200, 300 ms

Accuracy

5 % (0 – 630 A)

10 % (>630 A)

Indication

LED-display fields

3 red LEDs: phase-selective L1, L2, L3

1 red LED: short-circuit I>>

1 yellow LED: earth fault IE>

Remote signal

3 Relay contacts

Relay contact

Permanent or momentary contact (1 s), adjustable

Contact capacity:
230 V AC/1 A/62.5 VA max.
220 V DC/1 A/60 W max.

Reset

  • By button
  • Automatic time reset: 2, 4, 8, 24 h
  • Remote rest
  • Current restoration
  • Restoration of auxiliary supply (only AC/DC version)

Power supply

  • CT powered
  • Internal power supply: Long-life lithium cell, active flashing time >900 h, shelf life ≥20 years
    AC/DC version: back-up capacitor, max. 8 h
  • External auxiliary supply: AC/DC version: 24 – 230 V AC/DC

Housing

Polycarbonate, IP40

Temperature range

-30 to +70 °C

Accessories

Current Sensors

Single-phase current sensor

  • Split-core cable-type current sensor
  • For retrofit on insulated cables
  • 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
  • Without FOC

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 accessories for short-circuit and earth fault indicators

Disassembly clip

  • For retracting plug-in housings type Alpha, Opto, Earth  and Sigma

more...
49-9090-016
Spring clip

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

more...
49-9090-018
Spring clip

Spring clip suitable for 3 mm front plate thickness

more...
49-9090-019

Dimensioned Drawings

Product

Note Item Number

Sigma F+E 3 2.0

Item Number37-5113-101

Sigma F+E 3 2.0 AC/DC

Item Number37-5123-101


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