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

Voltage monitoring relay with delay timer for return to operating state, monitoring of increased and decreased voltage, setting of minimum and maximum voltage value, with phase sequence control GKV-12F, TENSE

The operation algorithm of the voltage monitoring relay is as follows:

When the relay is connected to the supply voltage and the voltage values correspond to the set values, the relay is activated and the relay LED () lights up. When the voltage values exceed the set values, the corresponding fault LED lights up, waits for a delay time (DT), after which the relay is deactivated and the relay LED goes off. When the voltage returns to normal values, the device waits for a reset time (RT) after which the relay is activated and the relay LED is illuminated.

Required settings and error messages

• HV: high voltage setting, when the voltage rises above this value, the HV LED will light.

• LV: low voltage setting, when the voltage drops below this value, the LV LED lights up.

• DT: delay time, waiting time before entering the error.

• RT: reset time, the time to wait before the relay responds when the voltage returns to normal.

Relay activated: contacts 2 and 3 closed, 1 and 2 open.
Relay deactivated: contacts 2 and 1 closed, 3 and 2 open.

Technical specifications

• Operating voltage: 3×380 VAC, 50/60 Hz

• Rated operating voltage: 220 VAC, 50/60 Hz

• High voltage: 230 V-300 V

• Low voltage: 140 V-210 V

• Delay time: 0.1 s - 20 s

• Reset time: 0.1 s - 20 s

• Operating power: < 6 VA

• Operating temperature: -20 °C to +55 °C

• Display: 4 LEDs

• Weight: 0.210 kg

• Contact: 5 A / 250 VAC (resistive load)

• Operating altitude: < 2000 m

• Cable diameter: 1.5 mm²