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Abb acs 880 earth cable wrongly placed at dc +

Guna 01 Sie 2017 15:53 690 3
  • #1 01 Sie 2017 15:53
    Guna
    Poziom 3  

    Hey i need a help my customer wrongly insert thier earth cable to the dc + terminal. Their is no burn mark in inverter and the input diode and output igbt perfectly okey. But when i give supply 415v to the input terminal there is no display. Need help.

  • #2 01 Sie 2017 16:50
    bonanza
    Spec od Falowników

    If your power network has a neutral point grounded (not insulated from earth) - there must be any damage. Check if you have 570 volts dc at main capacitor - probably no voltage. If so - look for any fuse, low ohm resistor or NTC between mains terminals, main rectifier and capacitor.
    Are you sure 3x415V is present?

  • #3 02 Sie 2017 03:26
    Guna
    Poziom 3  

    bonanza napisał:
    If your power network has a neutral point grounded (not insulated from earth) - there must be any damage. Check if you have 570 volts dc at main capacitor - probably no voltage. If so - look for any fuse, low ohm resistor or NTC between mains terminals, main rectifier and capacitor.
    Are you sure 3x415V is present?

    Ya there is 415 present at input terminal. And there is no neutral point grounded. They using transformer 0v.

  • #4 02 Sie 2017 08:46
    bonanza
    Spec od Falowników

    Find main electrolytic capacitor (the biggest one) and check yoltage. >550V - check low woltage power supplu (probably pulse transformer left center on the photo. No voltage - seek fuse or resistor burnt on board.

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