Double-Pole Power Outputs Po3 And Po4 With Trip Circuit Supervision - ABB Relion SMU615 Technical Manual

1MRS758407 B
3.9.1.2
SMU615
Technical Manual
PO1
PO2
GUID-4E1E21B1-BEEC-4351-A7BE-9D2DBA451985 V1 EN
Figure 22: 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.
X100
6
7
8
9
Section 3
Basic functions
57