Power Output Contacts; Dual Single-Pole Power Outputs Po1 And Po2 In Power Supply Module - ABB 615 series Technical Manual

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Basic functions

Power output contacts are used when the current rating requirements of the contacts are

high, for example, for controlling a breaker, such as energizing the breaker trip and closing

The contacts used for external signalling, recording and indicating, the signal outputs,

need to adjust to smaller currents, but they can require a minimum current (burden) to

ensure a guaranteed operation.

The protection relay provides both power output and signal output contacts. To guarantee

proper operation, the type of the contacts used are chosen based on the operating and reset

time, continuous current rating, make and carry for short time, breaking rate and minimum

connected burden. A combination of series or parallel contacts can also be used for special

applications. When appropriate, a signal output can also be used to energize an external

trip relay, which in turn can be confiugred to energize the breaker trip or close coils.

Using an external trip relay can require an external trip circuit supervision

relay. It can also require wiring a separate trip relay contact back to the

protection relay for breaker failure protection function.

All contacts are freely programmable, except the internal fault output IRF.

Power output contacts

Power output contacts are normally used for energizing the breaker closing coil and trip

coil, external high burden lockout or trip relays.

Dual (series-connected) single-pole (normally open/form A) power output contacts PO1

and PO2 are rated for continuous current of 8 A. The contacts are normally used for

closing circuit breakers and energizing high burden trip relays. They can be arranged to

trip the circuit breakers when the trip circuit supervision is not available or when external

trip circuit supervision relay is provided.

The power outputs are included in slot X100 of the power supply module.

1MAC059074-MB A

615 series ANSI

Technical Manual

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