9. Testing of Electric Vehicle Charge Point RCD’s (MFT1845+ only)
EV
45+
Figure 8: Switch settings
To test an Electric Vehicle charger (EV) RCD. The sequence will automatically run the following in Auto EV mode:-
EV Type AC B
½ x I at 0°
X
½ x I at 180°
X
1 x I at 0°
X
1 x I at 180°
X
5 x I at 0°
X
5 x I at 180°
X
DC RAMP 0°
X
DC RAMP 180°
X
EV RCD Table
1. Select the auto option on left range knob (see Figure 8).
2. Select the EV option on right range knob (see Figure 8).
3. Connect the red (L1), green (L2) and blue (L3) to the MFT.
4. Connect the opposite ends of the test leads to the RCD protected EV circuit*.
5. Ensure the MFT shows the circuit is live as in Figure 9 below:
Figure 9: Instrument displaying that the circuit is live.
NOTE : If no supply voltage is shown, check the status of the electrical supply to the EV charging point and
ensure the RCD is switched on.
NOTE : If N< >L is displayed, the live and neutral are reversed. For MFT1800 series, the test should proceed
as normal. For MFT1800 series, the test will be aborted. Check connection to the instrument and change to
the charge point.
1. Press the TEST button on the MFT. The test sequence will run as in EV RCD Table shown above.
2. On completion of the test, the display will show “End” in small letters
www.megger.com MFT1800 series
47
Testing of Electric Vehicle Charge Point RCD’s (MFT1845+ only)
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