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Functional Tests
11.12 Primary and Secondary Testing of the Synchronization Function
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Figure 11-8
2. The arrangement in
timer. Set the timer to the range 1 s or a tripping of 1 ms.
Connect the circuit breaker manually. The timer is started simultaneously by this. After the poles of the circuit
breaker close, the voltage V
If the timer is not stopped owing to an unfavorable closing moment, repeat the attempt.
Siemens recommends calculating the average value from several (3 to 5) successful switching attempts.
NOTE
i
i
Add the command output time of the protected device to measured time. This exclusively depends in good
approximation on the binary output used for the close command. You can find the switching times for the
different binary outputs in the Technical data. Set the total time with the parameter CB make time.
Round off to the next lower adjustable value. Proceed in the same way for all other synchronization stages
used.
1392
Measurement of the Circuit-Breaker Closing Time
Figure 11-9
is suitable for measuring the circuit-breaker operating time with external
appears. The timer is then stopped.
Line
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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