Siemens 3VA1 100 A Manual page 407

Test transformers
This procedure tests the transformers (energy transformer or Rogowski coil) to determine the
following:
● Are transformers installed in the ETU?
● Are transformers correctly installed in the ETU?
● Are the installed transformers functioning correctly?
Note
In order to carry out this test, it is absolutely essential to disconnect all external power
supplies (e.g. EFB300, COM800, COM100, 24 V module) to the electronics.
Execute the test
1. Disconnect all external power supplies to the electronics.
2. Connect the TD500 test device to the 3VA2 molded case circuit breaker.
3. Switch on the 3VA2 molded case circuit breaker.
4. Press the pushbutton labeled <TRANS>
The LED in the <TRANS> pushbutton begins to flash. The test takes several seconds.
5. Wait until the LED in the pushbutton <TRANS> changes from flashing to steady
illumination.
The test is completed.
6. Evaluate the test result by the status of the LED labeled "RESULT":
LED "RESULT" is illuminated steadily in green: The test was successful.
LED "RESULT" flashes red: The test was unsuccessful and must be repeated. If the test
fails again, contact Technical Support (Page 12) .
7. Press the pushbutton <TRANS> again in order to confirm the test result and restore the
TD500 to its initial state.
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02
①
.
Accessories
4.11 Test devices
407