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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. 

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     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

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  • 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

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