Trip circuit supervision relay Siemens Power Transmission Distribution

7PA30 single phase is for the supervision of the trip circuit of a circuit breaker with one trip coil. While 7PA30 three phase is for the supervision of the trip circuit of a circuit breaker with three selective trip coils.


The trip circuit wiring is supervised from the positive supply to the negative supply whilst the circuit breaker is open or closed.


The design, quality and rugged construction of the relay make it suitable for applications requiring high levels of reliability/dependability.


The high degree of protection guarantees reliable operation over a wide temperature range, even under extreme environmental conditions. The relay has been tested in accordance with IEC, EN and IEEE standards. The relay is CE marked.


The supervision current is always less than 1,4mA thus avoiding unwanted operation of the trip coil. Correct operation is shown via a green LED.

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