Circuit-Breaker Condition,
Phase-Segregated
Description
Opening
This is a dynamically occurring condition that results when, while a
trip command is active and the auxiliary contact is still closed, the
current falling below the threshold value is detected because the
current-flow criterion takes effect faster than the auxiliary contact
can open.
Detection Manual Closure (for AREC and Process Monitor)
Function Description
Detection of Manual Closure (for AREC and Process Monitor)
The Manual closure function block detects any closure carried out by hand. This information is used in the
Automatic reclosing (AREC) and Process monitor functions (within protection function groups).
You will find detailed information in the chapters AREC and Process monitor.
The following figure shows the logic for manual closure detection.
[loghande-091210-01.tif, 3, en_US]
Figure 5-50
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).
5.6.7
5.6.7.1
5.6.7.2
Function-Group Types
5.6 Function-Group Type Circuit Breaker, 1-/3-Pole
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Summary of Contents for 6MD85
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