Sync Check Relay

Synchro check or sync check relays are used to verify that voltage phase angle frequency and phase rotation across two sides of a breaker are the same prior to closing the breaker.

Sync check relay.

The volt free relay contacts change state when the voltage level phase relationship and frequency are within the selected synchronising limits. This relay contains the allowable percentage of mismatch of voltage and frequency. We would like to show you a description here but the site won t allow us. Check synchronous relay setting.

Synchrocheck relays ensures that bus and line side voltages are within programmed differentials of voltage magnitude phase angle frequency and phase rotation is the same. The numerical synchro check relay type spau 140 c is a voltage measuring relay designed to be used when two power systems are to be connected together. Today these are digital microprocess. The synchro check relay spau 140 c can be used for both synchro check functions and voltage check functions.

Connecting two electrical systems that are not closely matched can cause expensive damage and disturbance to the electrical. The synchro check function is used when two separate networks or two electrically. It means we can do still synchronization with the 1 5 voltage or frequency mismatch.