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Circuit-Breaker Test
The Circuit-breaker test function enables you to easily perform a complete test of the trip circuit, the closing
circuit, and the circuit breaker. For this, the circuit-breaker test carries out an automatic opening and closing
cycle or an only-open cycle of the circuit breaker during operation. You can also include a current-flow crite-
rion in the test. The effect of the current-flow criterion is to ensure the circuit-breaker test is only carried out if
the current flow across the circuit breaker is below the parametrizable threshold.
i
i
NOTE
If the circuit-breaker auxiliary contacts are not connected, a circuit breaker that has been opened can be
permanently closed.
The following test program is available for you to carry out the circuit-breaker test.
No.
Test Program
1
3-phase open/closed cycle
Structure of the Function
The Circuit-breaker test function is used in protection function groups for circuit breakers.
[dwcbch01-240217, 1, en_US]
Figure 11-3
Embedding of the Function
[dwzecbc3p2-030217, 2, en_US]
Figure 11-4
Structure of the Function
Test Procedure
The following conditions must be satisfied before the circuit-breaker test can start:
²
If a circuit-breaker auxiliary contact signals the position of the breaker pole to the device via the binary
inputs of the signal
Position
, the test cycle is not initiated unless the circuit breaker is closed.
²
If the circuit-breaker auxiliary contact has not been routed, you must ensure that the circuit breaker is
closed.
²
The circuit breaker must be ready for an open-closed-open or only-open cycle (indication
>Ready
).
11.6
Functional Tests
11.6 Circuit-Breaker Test
1382
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
Summary of Contents for 7SJ82
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