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What is earth fault in ABB VFD?

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(@click2electro)
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What is earth fault in ABB VFD ? This fault comes when improper earthing connection or faulty earthing in drive or hardware issue in drive. Need to check drive power section and control section.

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Posts: 12534
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Topic starter
(@click2electro)
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Cause - Due to faulty connection of supply or earthing and hardware issue in drive. Check the condition of fault coming continuously or coming after run. These are the step to correct this fault :

1. Check connection of power wiring.

2. Check earthing, if earthing is proper then hardware issue in drive.

3. Check drive IGBT and rectifier using multi-meter.

4. Check reading of earthing between neutral and earth.

 

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(@onilll)
Joined: 1 year ago

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Posts: 5

@click2electro 

Was replaced:

1. both control units

2. IGBT run on other units

3. Try to run other motor

4. Cable earth OK

Fault appear after pushing button START and speed more than 0, if speed 0 no faults. 

 

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(@click2electro)
Joined: 3 years ago

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@onilll drive model no. ?

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(@onilll)
Joined: 1 year ago

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Posts: 5

@click2electro,

ACS800-U4-0610-5+E210+P901

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(@click2electro)
Joined: 3 years ago

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@onilll remove motor cable from drive and start drive in local mode and check fault coming or not.

1. Check current in drive display when you run drive without motor.

2. If drive show current in drive display without motor then CT faulty 

3. Some time this fault comes due to faulty CT. You can test drive without CT - remove CT connector from AINT board and run drive without motor if fault not coming then CT faulty.

 

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(@onilll)
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Joined: 1 year ago

Thank you.
I did check CT's with multimeter and huntron station, all 3  show the same measurements. 

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(@onilll)
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Joined: 1 year ago

Problem resolved, Step by step:

1. Para. 30.17 from Fault to Warning

2, Run drive without motor. 

3. If problem executable part, lake IGBT and around, you will receive some other Fault like overvoltage, short circuit, etc. If have same Fault earth (2330), have to take a look on monitoring side. 

4. After click2electro

advise I check CT's in two different ways, all of them show absolutely same readings. I bought one and though will change one by one. But catch it on the first one.

So, click2electro

thank you and measuring CT's not helps all the times. 

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(@click2electro)
Joined: 3 years ago

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@onilll thanks for your feedback.

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