[logikdiagramm-endfehlerschutz-wlk-310702, 1, en_GB]
Figure 2-19
Logic diagram of stub fault protection
1)
The output indications associated with the pickup signals can be found in
2)
The output indications associated with the trip signals can be found in
Instantaneous tripping before automatic reclosure
If automatic reclosure is to be carried out, quick fault clearance before reclosure is usually desirable. A release
signal from an external automatic reclosure device can be injected via binary input
>O/C InstTRIP
. The
interconnection of the internal automatic reclose function is performed via an additional CFC logic, which typi-
cally connects the output signal 2889
AR 1.CycZoneRel
with the input signal
>O/C InstTRIP
. Any stage
of the overcurrent protection can thus perform an instantaneous trip before reclosure via the parameter
Telep / BI ...
.
Switching onto a fault
To achieve fast tripping of the circuit breaker in the event of an earth fault, the manual CLOSE detection func-
tion can be used. The time overcurrent protection can then trip three-pole without delay or with a reduced
delay. It can be determined via parameter settings for which stage(s) the instantaneous tripping following
energization applies (see also the logic diagrams
).
Functions
2.3 Overcurrent protection (optional)
SIPROTEC 4, 7VK61, Manual
73
C53000-G1176-C159-5, Edition 05.2018
Summary of Contents for SIPROTEC 4 7VK61
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