Accessories
4.11 Test devices
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
521
The purpose of the meter test is to determine whether the ETU is measuring and displaying
current correctly. A test current of 0.4 x I
n
is fed into the ETU. The current value measured by
the ETU is then checked to confirm that it matches the test current.
The molded case circuit breaker does
need to be switched to position "ON" for this test.
1. Connect the TD500 test device to the 3VA2 molded case circuit breaker.
2. Press the pushbutton labeled <METER>
①.
The LED in the <METER> pushbutton begins to flash. The test takes approximately
30 seconds.
3. Wait until the LED in the pushbutton <METER> changes from flashing to steady
illumination.
The test is completed.
4. 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 10) .
5. Press the pushbutton <METER> again in order to confirm the test result and restore the
TD500 to its initial state.
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?
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.
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