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. Sync check relay synchronism check relay are relays that allow unattended synchronization of a machine with a system. It means we can do still synchronization with the 1 5 voltage or frequency mismatch. The synchro check relay spau 140 c can be used for both synchro check functions and voltage check functions.

This relay contains the allowable percentage of mismatch of voltage and frequency. Today these are digital microprocess. The synchro check relay can be used to assist in the semi automatic parallelling of two ac power systems. We would like to show you a description here but the site won t allow us.

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. I have used the check synchronous relay with the setting of 1 5 mismatch. Check synchronous relay setting.