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F0021 CURR MEAS Fault in ABB ACS550 Drive

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Posts: 12833
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(@click2electro)
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Joined: 3 years ago

Do one thing remove all CT connector from power card and check any fault comes ?

If fault not coming then CT faulty if fault comes then control card fault.

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Posts: 8
(@motaz4a)
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Joined: 2 months ago

I have same problem in ABB ACH550, can you please share photo for CT location into the power board?

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(@click2electro)
Joined: 3 years ago

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@motaz4a please share your power board pic

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(@motaz4a)
Joined: 2 months ago

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(@click2electro)
Joined: 3 years ago

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Posts: 12833

@motaz4a check attachment for ct and ct circuit

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(@motaz4a)
Joined: 2 months ago

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Posts: 8
  • @click2electro I have replaced the CTs and CT IC mentioned in your reply and the fault gone. Thank you
  • Kindly assist me in new case that is appeared after replacing the power module, where the output voltage is not same between phases as follow:
  • U-V= 380v
  • U-W= 260v
  • V-W= 265v
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(@click2electro)
Joined: 3 years ago

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Posts: 12833

@motaz4a check attachment, may be IGBT driver section faulty. 

IGBT driver section mark on attachment image.

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(@motaz4a)
Joined: 2 months ago

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Posts: 8

@click2electro I didn't find the attachment, could you please resend it?

meanwhile, the IGBT driver has been replaced (2 ICs), While replacing the power module I found some of the tracks were cut and I have tried to repair them.

I will check them again

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(@click2electro)
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(@motaz4a)
Joined: 2 months ago

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@click2electro Thank you

one question please, I have ordered CT (HX 10-NP) from Farnell site but the received CT although has same P.N but different connection between primary and secondary as follow photos, therefore I have opened the new CT and reconnect the primary and secondary as the original. Does that affect the current measurements or that's fine?

 

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(@click2electro)
Joined: 3 years ago

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@motaz4a use only original CT if use another CT may be some current sensing issue occurs

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(@motaz4a)
Joined: 2 months ago

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Posts: 8

@click2electro I have compared the current measurements circuit in both CTs they are identical but only the difference in primary/secondary connection in series or in parallel.

I have adjust the connection as per the original CT.

I will run the VFD to check the current readings

 

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(@click2electro)
Joined: 3 years ago

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@motaz4a ok check and update us.

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