Functions
2.25 Function Control and Circuit Breaker Test
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
444
Figure 2-218 Logic diagram of the manual closing procedure
Reclosure via the integrated control functions - on-site control, control via DIGSI, control via serial interface -
can have the same effect as manual closure, see parameter 1152 Chapter 2.1.4.1 at margin heading „Circuit
Breaker Status“.
If the device has an integrated automatic reclosure, the integrated manual closure logic of the 7SD5 automat-
ically distinguishes between an external control command via the binary input and an automatic reclosure by
the internal automatic reclosure so that the binary input „>Manual Close“ can be connected directly to the
control circuit of the close coil of the circuit breaker (Figure 2-219). Each closing operation that is not initiated
by the internal automatic reclosure function is interpreted as a manual closure, even it has been initiated by a
control command from the device.
Figure 2-219 Manual closure with internal automatic reclosure
CB Circuit breaker
TC Circuit breaker close coil
CBaux Circuit breaker auxiliary contact
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