Table 3-1 Changing setting groups using binary inputs
Binary Input Active Group
>Param.Wahl1 >Param. Wahl2
no no Group A
yes no Group B
no yes Group C
yes yes Group D
[einstellgruppenumschaltung-ueber-binaere-160502-wlk, 1, en_US]
Figure 3-1 Connection diagram (example) for setting group switching using binary inputs
Trip Circuit Supervision
Please note that two binary inputs or one binary input and one bypass resistor R must be connected in series.
The pick-up threshold of the binary inputs must therefore stay substantially below
half the rated control DC
voltage.
If two binary inputs are used for the trip circuit supervision, these binary inputs must be volt-free i.o.w. not be
commoned with each other or with another binary input.
If one binary input is used, a bypass resistor R must be used (see following figure). The resistor R is inserted
into the circuit of the 52b circuit breaker auxiliary contact to facilitate the detection of a malfunction also
when the 52a circuit breaker auxiliary contact is open and the trip contact has dropped out. The value of this
resistor must be such that in the circuit breaker open condition (therefore 52a is open and 52b is closed), the
circuit breaker trip coil (52TC) is no longer energized and binary input (BI1) is still energized if the command
relay contact is open.
Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC 4, 7SJ61, Manual 233
C53000-G1140-C210-6, Edition 05.2016
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