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Megger EV adapter

lyledunn

The Megger EV adapter has a proximity pilot selector that ranges from N/C to 63A. Presumably it places a particular resistance across PP and PE to mimic the cable capacity but I am at a loss as how to use it. I am thinking that one might need to connect an oscilloscope to view the PWM. I have contacted Megger but no reply as yet. 

  • 0

     I assume it is something like one of these ?

    I'm not sure they expect you to do so, but the duty cycle of the PWM can be deduced with a voltmeter after an RC filter, and min/max peaks can be held with  diodes and caps though a scope would be easier.

    "Also provided are 4 mm connection ports L1, L2, L3, N, PE and CP signal terminals to which
    appropriate measuring equipment can be connected for further testing.     "

    == "Megger are not too sure what you ought to do with these, so you are on your own" ;-), well maybe

    For the basic getting the power  contactor to trip on to do a Zs test and so forth, you do not need them at all.

    I like the idea you have to provide your own dummy load with 13A plug.

    Mike

  • 0

    That link didn’t open Mike. Just thinking that perhaps unless the PP selection is correct for the charger output, then it might not pull the contactor in. So, for example, a 32A untethered charger will not deliver through a 16A lead. 

  • 0

    I believe there's a product recall on some of these, so it may not actually do what it's supposed to. 

  • 0 in reply to lyledunn

    https://www.elfa.se/Web/Downloads/_m/an/EVCA_eng_man.pdf

    not sure why you cannot load it.model EVCA210

    Mike.

  • 0 in reply to mapj1

    Thanks Mike. What I refer to is at the top of page 9. So you plug the adapter in, turn the PP selector knob, then what? 

  • 0

    I was slightly amused/surprised to see that the adaptor includes a "neon screwdriver" type of check on the c.p.c. ("touch the PE
    Pre-test button with a bare finger.    ").

    So you plug the adapter in, turn the PP selector knob, then what? 

    I guess from a BS 7671 perspective you only need to persuade the charge point to 'switch on' and then do all your normal test (Polarity, Zs, RCD, phase rotation etc) ... but then perhaps you could do most of those tests at the incoming terminals of the charge point and not have to bother with the adaptor at all.

    I don't know if the standard for charge points requires any further tests (presumably not IEC/EN 62851-1 as stated - that appears to be for 'Social alarm systems').

    Perhaps, as an early model, they're just exposing all possible features - that doesn't mean you necessarily have to use them.

       - Andy.

  • 0 in reply to lyledunn
    lyledunn said:
    So you plug the adapter in, turn the PP selector knob, then what? 

    Check that the contactor in the charger goes 'klunk' and that LN and E then have their normal voltages and Zs and RCD functions by plugging your multi-test or whatever into the 13A test socket on the adapt or at least I think so - all the extra trick stuff is just to get the charger to think there is a real car there.

    The other pins are for future expansion by other bits of testgear you do not have, for more detailed charger  tests that as yet BS7671 doe snot require.

    Mike.

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