ABB REF 54 Series Technical Reference Manual page 44

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44
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Technical Reference Manual, General
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The single-pole power outputs BIO2_7_PO1 and BIO2_7_PO2 as well as the high-
speed single-pole power output PS2_4_HSPO8 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.
e.g.
BIO2_7_PO1,
BIO2_7_PO2
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The double-pole power outputs BIO2_7_PO3 ... BIO2_7_PO6 are outputs where the
object to be controlled (e.g. a circuit breaker) is electrically connected between the
two relay contacts, see the figure below. These outputs can be used for tripping
purposes and for circuit breaker and disconnector control.
e.g.
BIO2_7_PO3...
BIO2_7_PO6
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+
CB
-
PO1conn
+
CB
-
PO3conn
1MRS750527-MUM