Three-phase overvoltage, undervoltage, sequence/fault control three-phase monitoring/protection relays

Voltage control relay with delayed reset, over and under voltage control, minimum and maximum voltage setting, with phase sequence control GKV-12F, TENSE

The operating 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 (). If the voltage values exceed the set values, the corresponding fault LED lights up, the delay time (DT) is awaited, after which the relay is deactivated and the relay LED goes out. When the voltage returns to normal values, the device waits for the reset time (RT), after which the relay is activated and the relay LED lights up.

Required settings and error messages

• HV: high voltage setting, when the voltage exceeds this value, the HV LED lights up.

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

• DT: delay time, waiting time before entering a fault.

• RT: reset time, time to wait until the relay reacts 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