Phase Protection Relay

Code : PSC.G.4W

tracks the phase sequence. if it is normal,device uses (2) output. If it is reverce,device uses (1) output. If voltage unbalance between phases (asymmetry) exceeds 20% during the 5 sec, relay output contact switches off. When the voltage unbalance back to normal, after 5 seconds output relay switches on. If one of the phases does not exist, the device gives no phase warning and it switches off the relay output. if all three phases are available, output relay switches on after 5 seconds. when the broken of the neutral cable, device does not allow the output. Power of the device must be shut down and after the neutral cable is repaired, should be give energy.