Detail KRK FMK 50N - 08N Motor (Phase) Protection Relay Without Neutral
Phase Protection Relay are for protecting motors in 3 phases systems from Phase Failure, Phase Asymmetry, Sequence and over heat situations. All voltages are rated in True RMS very accurately. These functions are shown below. 1) Phase Sequence: If the phase are not in right Sequence Relay never energize the system. 2) Phase Failure: If one of the phases are lost for any reason relay cuts the output for protecting the motor. If one of the phase are below 0, 5 of Un or Over 1, 5 of Un, relay cuts output without any delay. 3) Phase asymmetry: If between phases asymmetry is more than tolerance cuts the system.