Earth Fault Relay Connection Diagram. The normally closed terminals of the fault signalling contacts are connected to the undervoltage release coil of the circuit breaker. The output of the current transformer is equal to the zero.
In the diagram 87n is the ansi device number for restricted earth fault. Overview technical specification connection diagrams applications earth fault ground fault monitoring of 3 phase systems manual reset input 1a or 5a through cbct adjustable earth fault trip setting adjustable trip delay 2 co relay output system supply system 24 30 vdc 100 120 220 240 380 440 v ac 20 auxillary. Operational power is applied to the terminal a 1 and a 2 of the elr and the cbct is connected to the terminals t 1 and t 2.
Overview technical specification connection diagrams applications earth fault ground fault monitoring of 3 phase systems manual reset input 1a or 5a through cbct adjustable earth fault trip setting adjustable trip delay 2 co relay output system supply system 24 30 vdc 100 120 220 240 380 440 v ac 20 auxillary.
Operational power is applied to the terminal a 1 and a 2 of the elr and the cbct is connected to the terminals t 1 and t 2. In the diagram 87n is the ansi device number for restricted earth fault. The scheme of connection for 3 nos over current relay 1 no earth fault relay is shown in figure below. The output of the current transformer is equal to the zero.
