Phase control relay FKV-11 | TENSE

Phase control relay FKV-11 is intended to protect three-phase equipment from key faults in the electrical network - especially from phase disturbances (phase reversal), phase failure and phase asymmetry. The relay ensures reliable operation of electric motors, pumps, compressors, and other three-phase equipment.

The model has a fixed asymmetry of 30% and is designed for installation on a single DIN rail.

How the FKV-11 relay works (operating algorithm)

Normal operation

• All three phase voltages are present.

• Phases are connected in the correct order.

• Voltage is within the allowed range.

• Contacts 2-3 are switched, LED OUT → output is active.

Asymmetry or voltage deviation

• If the voltage of one phase changes by more than 30 % or if the sum of multiple directional changes exceeds this limit:

  • LED ASM lights up (asymmetry indication),

  • contacts 2-3 disconnect,

  • contacts 1-2 turn on,

  • LED OUT turns off.

Return to normal state

• If the voltage returns to the allowed range,

• the relay will reactivate the output and the contacts will switch back to 2-3 closed contacts.

Main features and benefits

• Protection against:

  • phase failure,

  • incorrect phase sequence,

  • phase asymmetry (fixed 30%).

• Visual status indication with LED (OUT / ASM).

• Fast response to network faults.

• Compact design - width only 22.5 mm.

• Easy mounting on DIN rail.

Technical parameters

Dimensions

• Length: 85 mm

• Height: 77.6 mm

• Width: 22.5 mm