Three-phase monitoring/protection relay for overvoltage, undervoltage, sequence/fault control

Three-phase monitoring/protection relay for controlling overvoltage, undervoltage, sequence and phase failure with timer - GKT-03 / GKT-03F (POWERFUL)

Three-phase voltage monitoring relay 5A, 260-410 VAC, no neutral conductor monitoring, with phase sequence - TENSE

Three-phase voltage monitoring relay with undervoltage and overvoltage monitoring function, adjustable time delay and automatic reset.

Main features

• Overvoltage (HV) monitoring - if the voltage exceeds the set value in at least one phase.
  Setting range:

  • GKT-03: 400-510 V

  • GKT-03F: 400-510 V

• Undervoltage monitoring (LV) - if the voltage drops below the set value in at least one phase.
  Setting range:

  • GKT-03: 260-370 V

  • GKT-03F: 260-370 V

• Fault time delay (DT) - response time to voltage deviation from setpoint.
  Range: 0.1-20 s

• Return Time (RT) - time delay for the relay to reclose after the voltage returns to normal.
  Range: 0.1-20 s

• Auto Restart - the device automatically returns to operation (within the set time) after the values have normalized.

• Phase sequence / phase failure - available on GKM-02F and GKT-03F versions.

• Power supply voltage monitoring - relay switches off when power supply drops below 152 V (GKT-03 / GKT-03F).

• Hysteresis of 3% to return the relay to the operating state.

• LED indication of all faults and relay status.

• Output contact - switching dry contact NO + NC, maximum current 5 A.

• DIN rail mounting, compact dimensions.

Important notice

These relays are not used for voltage regulation.
They are only intended to protect and disconnect loads (appliances, equipment) from the mains when:

• overvoltage,

• undervoltage,

• phase failure,

• incorrect phase sequence,

• loss of neutral conductor (for relevant models).