Earth Leakage Relay With Cbct

Check the sensitivity of earth leakage relay and also the inner diameter of core balance current transformer.

Earth leakage relay with cbct.

Installation procedure for earth leakage relay cbct. The core balance current transformer or cbct is normally of the ring type through the centre of which is passed cable that forms the primary winding. The earth leakage relay elr has back lit lcd display 2 line 8 character for displaying the nature and magnitude of fault. Earth leakage relay elr can detect if the cbct zct connection status ie detecting the cbct zct open to ensure the healthiness of the relay.

Of the elr and cbct should match for better performance the performance shall be guaranteed if the serial no. Earth leakage relay with inbuilt cbct 30ma fixed elctr35 1 30ma 230v. Of the elr and cbct are matched. An earth fault relay connected to the secondary winding is energised only when there is residual current in the primary system.