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Opto F 3.0

The Opto F 3.0 device is a short-circuit indicator. It is designed, to detect, display and remotely indicate short-circuit currents in medium voltage distribution networks.

Short-Circuit Indicator

Product Features

  • Fibre optic cables for electrical isolation between indicator and current transformers
  • High-intensity LED indication
  • Single and double flash mode for operation in radial and ring networks
  • Remote indication via relay contact
  • Current transformer retrofit ability

Your advantages

  • Installation on bare cables and busbars
  • New fault detection within reset time

The Opto F 3.0 is a short-circuit indicator. It is designed to detect, display and remotely indicate short-circuit currents in medium voltage distribution networks. The indicator unit can be used in all medium voltage switchgear installations. Fibre optic cables provide electrical isolation between the current transformers, mounted on cable/busbar, and the display unit when transferring signals.

The current transformers (CT) have an integrated trip threshold detection capability. When the pre-set trip current is reached or exceeded, light pulses will be emitted. A fibre optic cable is used to transmit these light pulses from the CT to the Opto. Phase-selectively operated red LEDs start flashing.

After the first tripping incident (e. g. in radial systems) the LEDs begin a phase-selective flash rhythm of: flash / pause / flash.

A second tripping (e. g. ring operated network with auto-reclosing) is indicated by flashing LEDs of the fault-affected phases in a flash-flash / pause / flash-flash rhythm.

 

Equipment set:

  • 1 Display unit (plug-in/surface mount housing)
  • 3 Short-circuit current transformers
  • 3 Fibre optic cables

Technical Data

Technical Data

OPTO F 3.0

Short-circuit indicator

Earth fault detection method Earth short-circuit

I>> Short-circuit trip current

400, 600, 800 or 1,000 A (adjustable, further trip current levels on request)

tI>> Response delay

40, 60, 80, 100, 200, 300, 500 ms (adjustable at the display unit)

Accuracy

±15 % (determined by current transformer)

Indication

3 red LEDS for phase-selective short-circuit, flashing period 2 s, double flash sequence 0.3 s with flashing period of 3 s

Optional: external signal lamp

Remote signal/communication

1 Relay contact

Remote contact

Potential-free permanent or momentary contact (adjustable)
Contact capacity:
380 V AC/5 A/1,250 VA max.
220 V DC/5 A/150 W max.

Remote reset/remote test

Separate inputs, potential-free NO contact, wiping time of NC contact ≥0.5 s

Power supply

  • Internal power supply: Long-life lithium cell, active flashing time >1,000 h, lifetime ≥20 years

  • External power supply: 12 – 110 V DC ±10 % or 24 – 60 V AC, 50 – 60 Hz (optional)

  • Optional accessories: Transformer with cable for top-hat rail or screw mounting (115 – 230 V AC/24 – 48 V AC)

Housing

Polycarbonate, IP40 (Plug-in housing), IP65 (Suface mount housing)

Temperature range

-30 to +70 °C

Accessories

Opto current transformers

Phase current transformer

  • For short-circuit and earth fault indicators type Opto F 3.0, Opto F+E 3.0
  • Trip currents 400, 600, 800 or 1.000 A
  • For conductor Ø 22 – 42 mm

more...
49-0101-202
Phase current transformer

  • For short-circuit and earth fault indicators type Opto F 3.0, Opto F+E 3.0
  • Trip currents 400, 600, 800 or 1.000 A
  • For conductor Ø 40 – 60 mm

more...
49-0101-203
Phase current transformer

  • For short-circuit and earth fault indicators type Opto F 3.0, Opto F+E 3.0
  • Trip currents 400, 600, 800 or 1.000 A
  • For conductor 20 x 4 – 40 x 10 mm

more...
49-0101-206

External Signal Lamps

External Signal Lamp

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

more...
49-0702-005

Other accessories for short-circuit and earth fault indicators

Fibre optic cable

Fibre optic cable 4 m (standard length for earth fault CTs)

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49-0602-009
Cutting tool for fibre optic cables

Cutting tool for fibre optic cables

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49-0109-003
Transformer

  • Transformer with cable for top-hat rail mounting
  • (115–230 V AC/24–48 V AC)

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49-0921-002
Optical testing unit

  • Optical testing unit to excite the indicator
  • for connection to the FOC plug

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49-0109-002
Disassembly clip

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

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49-9090-016
Spring clip

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

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49-9090-018
Spring clip

Spring clip suitable for 3 mm front plate thickness

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49-9090-019

Dimensioned Drawings

Product

Note Item Number

OPTO F 3.0 in plug-in housing

Item Number33-0513-001

OPTO F 3.0 in surface mount housing

Item Number33-0613-001


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