Voltage monitoring relay for the protection of three-phase networks against power fluctuations and incorrect phase sequence. Faulty alarm responses due to voltage spikes are prevented by a switching delay (0.1 – 10 s). The relay switches immediately if the voltage of a phase exceeds or falls below the nominal voltage by more than 50%.
Features
Overvoltage protection
Undervoltage protection
Phase-failure protection
Phase sequence protection
Switch-off delay.
Highlights & details
Operating voltage 230 V/AC
Undervoltage setting range (0.70 - 0.95) x Un
Overvoltage setting range (1.05 - 1.30) x Un
Overvoltage protection undervoltage protection Phase-failure protection phase sequence protection switch-off delay
1 8A relay output
Technical data
Undervoltage setting range: (0.70 – 0.95) x Un
Overvoltage setting range: (1.05 – 1.30) x Un
Immediate switch: 0.5 x U/1.5 x Un
Immediate switch period: 500 ms
Power supply: 3-phase, 4-conductor
