ABB RELION SMU615 Technical Manual page 65

1MRS758407 C
TCS2
Figure 25: Double-pole power outputs PO3 and PO4 with trip circuit supervision
Power outputs PO3 and PO4 are included in the power supply module located in slot
X100 of the merging unit.
3.9.1.3 Dual single-pole high-speed power outputs HSO1, HSO2 and HSO3
HSO1, HSO2 and HSO3 are dual parallel connected, single-pole, normally open/form
A high-speed power outputs. The high-speed power output is a hybrid discrete and
electromechanical output that is rated as a power output.
The outputs are normally used in applications that require fast relay output contact
activation time to achieve fast opening of a breaker, such as, arc-protection or
breaker failure protection, where fast operation is required either to minimize fault
effects to the equipment or to avoid a fault to expand to a larger area. With the
high-speed outputs, the total time from the application to the relay output contact
activation is 5...6 ms shorter than when using output contacts with conventional
mechanical output relays. The high-speed power outputs have a continuous rating
of 6 A.
SMU615
Technical Manual
PO3
TCS1
PO4
X100
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17
15
19
18
20
22
21
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24
Basic functions
65