50
1MRS755225
Transformer Terminal
Technical Reference Manual, General
RET 54_
If the power outputs BIO2_7_PO3... BIO2_7_PO6 are used as single-pole outputs,
the object to be controlled (e.g. a circuit breaker) is electrically connected in series
with the two relay contacts to provide sufficient current breaking capacity, see the
figure below.
PO2conn_n
Fig. 5.1.8.3.-2 Single-pole power outputs (PO)
5.1.8.4.
Signal outputs (SO)
The signalling relay outputs (BIO1_5_SO_) are not heavy-duty outputs and thus
they cannot be used for controlling e.g. a circuit breaker. Available relay contacts
are either Normally Open or Normally Open/Normally Closed type (NO or NO/
NC), see the figure below. These outputs can be used for alarming and other
signalling purposes.
nonc_b
Fig. 5.1.8.4.-1 Signal outputs (SO)
+
-
CB
e.g.
BIO2_7_PO3...
BIO2_7_PO6
NO/NC
NO
e.g.
PS1_4_SO1
e.g.
BIO1_5_SO1
