Single-Pole Power Outputs (Po) And A High-Speed; Single-Pole Power Output (Hspo); Double-Pole Power Outputs (Po) - ABB RET 54 Series Technical Reference Manual, General

1MRS755225
5.1.8.2.
5.1.8.3.
Transformer Terminal
Technical Reference Manual, General
Single-pole power outputs (PO) and a high-speed single-pole
power output (HSPO)
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
Fig. 5.1.8.2.-1 Single-pole power outputs BIO2_7_PO1 and BIO2_7_PO2, and
the high-speed single-pole power output PS2_4_HSPO8

Double-pole power outputs (PO)

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
Fig. 5.1.8.3.-1 Double-pole power outputs (PO)
+
CB
-
+
CB
-
RET 54_
PO1conn_b
PO3conn_b
49