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 and phase 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 maximum 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 might damage the device. Make sure device works after cleaning relay pulls and relay led is switched on. When relay pulls, contact 2 and 3 outputs are short circuit.
If any phase voltage is lower than minimum voltage set value, U< led is switched on. If phase voltage value does not turn back normal value in 2 second, 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 bigger than the minimum set value, U< led is switched off. If phase voltage value does not exceed the minimum set value with 5V hysteresis in 3 seconds, relay pulls and relay led is switched on. When relay pulls, contact 2 and 3 outputs are short circuit.
Asymmetry ratio is ratio of maximum phase voltage to difference between the maximum phase voltage and minimum bigger than asymmetry set ratio, Asym led is switched on. If asymmetry ratio 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. If Asymmetry ratio does not exceed the asymmetry set ratio with 2% hysteresis in 3 seconds, relay pulls and relay led is switched on. When relay pulls contact 2 and 3 outputs are short circuit.
Example:
Asymmetry ratio = [(Lmax - Lmin) / Lmax] x 100
Phase Voltages: L12=430V, L23=370V and L31=390V. Lmax=430V and Lmin=370V
Asymmetry ratio = [(430V - 370V) / 430V] x 100 = [60 / 430] x 100 = 0.14 x 100 = 14.
If phase sequence is reverse, relay releases and relay led is switched off and phase sequence (x) led is switched on. When relay releases, contact 1 and 2 outputs are short circuit. When phase sequence is right, phase sequence (x) led is switched off and after 5 seconds relay pulls and relay led is switched on. When relay pulls, contact 2 and 3 outputs are short circuit.
UniWave Electric
