[lohand3p-101210-01.tif, 3, en_US]
Figure 5-87 Logic for Manual Closure Detection
External Manual Closure
An external manual closure is communicated to the device via the input signal >Input. The input signal can
also be connected directly to the control circuit of the circuit-breaker closing coil. For this reason, detection is
suppressed in the event of a close command by the AREC function. Detection via the input signal >Input is
also blocked if the circuit breaker is closed or if a protection trip is active.
Internal Manual Closure
Manual closure is detected in all cases if a close command is transmitted by the internal control function of
the device. This is possible because the control carries out plausibility checks itself and is also subject to inter-
locking.
Application and Setting Notes
Input Signals: >Input, >Blocking of Manual Closure
In practice, the input signal >Input is connected directly to the control circuit of the circuit-breaker closing
coil (see following figure).
[losteuer-150113-01.tif, 1, en_US]
Figure 5-88 Connection of the Input Signal to the Control Circuit of the Circuit-Breaker Closing Coil
Every closure of the circuit breaker is recorded in the process. Therefore, detection is suppressed in the event
of a close command by the internal AREC function of the device.
5.7.9.2
Function-Group Types
5.7 Function-Group Type Circuit Breaker
292 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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