Double-Pole Power Outputs Po3 And Po4 With Trip Circuit Supervision - ABB RELION 620 Series Technical Manual

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1MAC504801-IB E

620 series ANSI

Technical Manual

GUID-4E1E21B1-BEEC-4351-A7BE-9D2DBA451985 V1 EN

Dual single-pole power output contacts PO1 and PO2

Double-pole power outputs PO3 and PO4 with trip circuit supervision

The power outputs PO3 and PO4 are double-pole normally open/form A power outputs

with trip circuit supervision.

When the two poles of the contacts are connected in series, they have the same technical

specification as PO1 for breaking duty. The trip circuit supervision hardware and

associated functionality which can supervise the breaker coil both during closing and

opening condition are also provided. Contacts PO3 and PO4 are almost always used for

energizing the breaker trip coils.

Basic functions

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