Megger EVX100 handleiding

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EVX100

18

Testing with the EVX

6.9 Testing the RCD/RDC

The EVX100 offers automatic test sequences for RCD and RDC testing. If only a part of the

sequence needs to be run, the AUTO sequence can be modified in SETTINGS RCD tab – refer to the

full MFT-X1 user manual.

1. Ensure the EV charger is connected to the EVX100 and the MFT-X1

2. Switch the MFT-X1 left rotary knob to RCD. The charger should enter Mode C2 as displayed

on the MFT-X1.

The Voltage widget should display live voltages.

If the charger terminals are not live the charger may need to be manually switched to the charging

mode. Refer to manufacturers’ instructions for the charger for over-riding the random delayed start

function in the charger settings..

3. Set Hot key 2 to EV A/B or EV A/RDC depending on the devices protecting the EV charger

4. Set Hot key 5 to L1-PE, L2-PE, L3-PE as required.

5. Press the TEST button. The MFT-X1 should start the test sequence.

6. Each time the EVX/MFT trips the RCD or RDC the instrument will try to reset the charger.

to state C2. Chargers with internal RCD and RDC or Type B RCDs may reset automatically.

Installations with external RCDs will need the RCD to be reset manually.

NOTE : A DC ramp test to be performed at the end to discover the DC tripping current.

For a Type B RCD the DC tripping current must be less than twice the rated current for AC

(i.e. 60 mA DC for a 30 mA RCD), so results around 40 mA are commonly displayed.

7. At the end of the test sequence the MFT-X1 will display a complete test sequence as below:

Completed sequence

The last tripped device should be reset and the MFT-X1 will return the EV charger to State C2.

NOTE :

1. Any faults on the earthing can produce a PE warning and prevent the test from proceeding

2. Some EV chargers isolate all terminals when tripped, including the earth terminal. The voltage

on the earth terminal may confuse the MFT-X1 and report an RE high error. Contact Megger

technical services for further advice.

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