ABB RET 543 - Double-Pole Power Outputs (PO); Single-Pole Power Output (HSPO); Single-Pole Power Outputs (PO) and a High-Speed

1MRS755225
Transformer Terminal
Technical Reference Manual, General
RET 54_
49
5.1.8.2. 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.
PO1conn_b
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
5.1.8.3. 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.
PO3conn_b
Fig. 5.1.8.3.-1 Double-pole power outputs (PO)
+
-
CB
e.g.
BIO2_7_PO1,
BIO2_7_PO2
+
-
CB
e.g.
BIO2_7_PO3...
BIO2_7_PO6