Relays
General
FKV-24F phase failure relays are designed to avoid any failure of three phase motors caused from network.
Usage and Working Principle
Make the connections according to the diagram. When power is on and device check the phase voltage values are in the between the maximum and minimum set values, phase balance and phase sequences. This control takes 3-4 seconds. If voltages of phases, phase balance andphase sequences are correct , relay pulls and relay led is switched on. When relay pulls , contact 2 and 3 output are short circuit. If any phase voltage is bigger than maximuage set value U> led is switched on. If phase voltage value does not turn back normal value in 2 seconds , relay releases and relay led is switched off . When relay releases, contact 1 and 2 outputs are short circuit. When all of phase voltage values are lower than the maximum set value, U> led is switched off. If phase voltage value does not exceed the maximum set value with 5V hysteresis in 3 seconds
Maintenance
Switch off the device and release from connections. Clean the trunk of device with a swab. Don't use any conductor or chemical
Asymmetry ratio is ratio of maximum phase voltage to difference between the maximum phase voltage and min