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1MRS 751108-MUM
Protection Relay
Technical Reference Manual, General
REX 521
17
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The high-speed power output HSPO1 can also be connected as a single-pole power
output where the object to be controlled (e.g. a circuit breaker) is electrically
connected in series with the two relay contacts, see the figure below.
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4.1.8.2.
Single-pole power outputs (PO)
The single-pole power outputs PO1...3 are outputs where the object to be controlled
is connected in series with two heavy-duty output relay contacts, see the figure
below. These outputs can be used for tripping purposes and for circuit breaker and
disconnector control. Two singe-pole outputs may be used to obtain another double-
pole output.
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+
-
cbcoilr
ex
HSPO1
CB
+
-
doubpolerex
CB
HSPO1
+
-
PO1connrex
CB
PO1...3
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