Siemens SIPROTEC Manual page 444

Line differential protection with distance protection

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2.25 Function Control and Circuit Breaker Test

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

Circuit breaker

Circuit breaker close coil

Circuit breaker auxiliary contact

SIPROTEC, 7SD5, Manual

C53000-G1176-C169-5, Release date 02.2011