I’m working on ADE7880 based 3phase 4wire static electricity meter. Meter configuration 240V, 100A Ct ratio = 2500. How to detect missing neutral tampering situation in PSM0 mode. Please give me details
To detect a missing Neutral situation you will need to monitor the voltage, if the RMS voltage goes lower then it should for the line (for example less than 10% of Vnom) and there is still RMS current being measured then this would be a missing neutral situation. On the ADE7880 you can set a voltage sag threshold. Just make sure the ADE7880 does not lose power so that the RMS can be monitored.
I checked But not working.It is very urgent one. voltage sag used under and over voltage temper
Normal Input (with neutral wire):
R phase = 240.01v and 5A
Y phase = 240.03v and 5A
B phase = 240.01v and 5A
Without Neutral wire:
R phase = 250.9v and 5A
Y phase = 238.02v and 5A
B phase = 236.76v and 5A
Each and every phase different voltage. How can i detect a missing Neutral situation
I can suggest two more options and you can check which one works for you.
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