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.
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
To Next Page
Loading...
