Three-phase Monitoring/Protection Relay for Overvoltage, Undervoltage, Sequence/Failure Control

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

Three-phase voltage control relay 5A, 260-410 VAC, without neutral conductor control, with phase sequence - TENSE

Three-phase voltage control relay with undervoltage and overvoltage control function, adjustable timing and automatic reset.

Main features

• Overvoltage monitoring (HV) - 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 control (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 delay time (DT) - response time to voltage deviation from setpoint.
  Range: 0.1-20 s

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

• Auto Reset - the device automatically resumes operation (within the set time) after the values have normalized.

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

• Power supply voltage control - the relay disconnects when the power supply voltage drops below 152 V (GKT-03 / GKT-03F).

• 3% hysteresis to return the relay to operating state.

• LED indication of all faults and relay status.

• Output contact - switched 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 corresponding models).