Megger MTB7671, Руководство пользователя

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7. TESTING AN RCD TESTER
Connect the tester to the RCD and loop test supply socket. When the
interlock cover is closed, the earth pin of this socket is connected to
the supply neutral.
7.1
Pre-Test Setup
Set the RCD test current on the tester and move the RCD and loop
test select switch to the appropriate position (e.g.10 mA, 30 mA or
100 mA). Check that the “mains socket power on” LED is lit. If not
then press the [reset] button.
7.2
Conducting 1/2 I Test
To perform a 1/2 I test set the tester to 1/2 I mode and perform the
test. The tester should not indicate a tripped RCD (if it does then it
should be returned for a full calibration). This can be repeated for
180° 1/2 I if provided on tester.
- Record the results on the record card
7.3
Conducting an I @ 0° Test
To perform a 0° I test set the tester to 0° I mode and perform the
test. The test box will trip and disconnect power. The [Tripped] LED
will light. The trip time should be a nominal 40 ms.
If the tester fails to indicate a tripped RCD then the tester should be
returned for a full calibration.
✍
- Record the reading on the record card.
To reset the test box press the [reset] button in the yellow panel.
7.4
Conducting an I @ 180° Test
To perform a 180° I test set the tester to 180° I mode and perform
the test. The test box will trip and disconnect power. The [Tripped]
LED will light. The trip time should be a nominal 50 ms.
If the tester fails to indicate a tripped RCD then the tester should be
returned for a full calibration.
✍ - Record the reading on the record card.
To reset the test box press the [reset] button in the yellow panel.
7.5
Conducting a 5I @ 0° Test
To perform a 0° 5I test set the tester to 0° 5I mode and perform the
test. The test box will trip and disconnect power. The [Tripped] and [5
I TEST] LEDs will light. The trip time should be a nominal 10 ms.