DOCA0095EN

PowerPact B Electrical Auxiliary Devices

Summary of Electrical Auxiliary Devices

The following table shows electrical auxiliary devices that can be added to circuit breakers. Auxiliary contacts can be installed on site. For more information, see the PowerPact B-Frame Catalog .

Electrical Auxiliary Device

Use

1P

2P

3P/4P

OF auxiliary contact

View the on/off status of the circuit breaker remotely.

SD auxiliary contact

View the trip status of the circuit breaker remotely.

MX shunt trip

Send an electrical trip command remotely.

MN undervoltage release

Trip the circuit breaker when the control voltage drops below a tripping threshold.

MN undervoltage release with time-delay unit.

Intended to avoid nuisance tripping in systems with frequent voltage dips lasting from 200 ms to 3 s.

Slots for Electrical Auxiliary Devices

The following figures show the available slots for electrical auxiliary devices mounted in the case. One auxiliary can be installed in each slot. For more information, see the PowerPact B-Frame Catalog.

2P Circuit Breaker

3P Circuit Breaker

4P Circuit Breaker

A. MN undervoltage release or MX shunt trip

B. OF auxiliary contact

C. SD auxiliary contact

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