Siemens SENTRON 3WL10 - Procedure for Testing the Accessories

5.5.2 Procedure for testing the accessories
To meet the high quality requirements of Siemens, this points are already tested if the circuit
breaker is con󹪝gured in the factory.
The accessories therefore only need to be tested after installation or conversion by the
user. The following points must be considered during commissioning after conversion or
installation:
Accessories to be tested Method
Geared motor 1. Run the geared motor for charging the springs at the appropriate nominal voltage.
Result: The springs are correctly charged. The signals are normal. When the springs are
charged, the geared motor stops.
2. Perform a few close and open operations.
Result: The geared motor charges the springs again after every closing operation.
NOTE: If there is one, switch on the undervoltage coil in advance.
Undervoltage coil 1. Run the undervoltage coil at the appropriate rated voltage and perform the closing
operation on the circuit breaker.
Result: The circuit breaker closes correctly. The behavior and the signals of the auxiliary
switches are normal.
2. Switch o󹪜 the power supply of the undervoltage release. The circuit breaker opens.
3. Operate the undervoltage coil at the appropriate nominal voltage and perform the
closing operation on the circuit breaker.
Result: The circuit breaker closes. The behavior and the signals of the auxiliary switches
are correct.
Note: If the circuit breaker has been tripped by the undervoltage release, the circuit
breaker cannot be reclosed until there is once again a voltage present at the undervolt‐
age release. Make sure that the coil was really tripped by a power failure. Otherwise
examine the circuit breaker and the device in question to see whether both are fully
functional.
Shunt trip (ST) 1. Close the circuit breaker.
2. Operate the opening coil at the appropriate nominal voltage.
Result: The circuit breaker opens correctly. The signals at the auxiliary switches are
correct.
Closing coil (CC) 1. Open the circuit breaker.
2. Charge the springs manually or electrically.
3. Operate the closing coil at the appropriate nominal voltage.
Result: The circuit breaker closes correctly. The signals at the auxiliary switches are
correct.
Shunt trip (ST) with
actuator module COM ACT
1. Supply power to the ETU with auxiliary voltage at the Breaker Connect module.
2. Switch on the contacts of the actuator module.
3. Close the circuit breaker.
4. Choose item "Open CB" in the menu of ETUs of the 6-series.
Result: The circuit breaker opens correctly. The behavior and the signals of the auxiliary
switches are normal.
Note: The test can be conducted if voltage is applied to the ETU and to the coils.
Connection and commissioning
5.5Commissioning
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
180 Equipment Manual, 10/2023, L1V30499596002-03