VFD Tripping an RCD

[EddyCurrent]

If the drive has stood a while then the DC link capacitors may need to be 'reformed', this is how to do it on an ABB drive

Guide for capacitor reforming

I also says in the manual;
"WARNING! Disconnect the EMC filter when installing the drive on an IT system (an ungrounded power supply or a high-resistance-grounded[over 30ohms] power system), otherwise the system will be connected to ground potential through the EMC filter capacitors. This may cause danger or damage the drive. Disconnect the internal EMC filter when installing the drive on a corner-grounded TN system, otherwise the drive will be damaged. NOTE: When the internal EMC filter is disconnected, the drive is not EMC compatible without an external filter"

It's unlikely you suffer from this problem but maybe you are fed from a local transformer ?. A friend of mine had a local transformer just for his property and RCD's tripped all the time.

[~andy]

Interesting suggestion re capacitor reforming.

I reckon it's worth bringing the VFD into the house and testing it alone on a different circuit.

Maybe an issue with the earth to workshop.

Good reasons to move the lights off the RCD.

[Clive S]

Ok I will just get the 100 ohm 500 W resistor out of my box

[~andy]

Ok I will just get the 100 ohm 500 W resistor out of my box

You could hook it up as a workshop heater when your done reforming your caps.

[Clive S]

Never thought about that: could also feed the solar panels into it

[EddyCurrent]

They used that because it's a common size for the braking resistor.

[toomast]

Hi!
Did you manage to solve your issues?
What was the outcome?

[Washout]

Wow - this was a long time ago.

If I remember correctly I switched out the type B RCD for a Type C to stop the issue and it hasn't tripped since.

[john swift]

depending on the make of VFD
you have you may find the EMI filter required to get the CE mark for sale in the EU has a removable jumper to break the filters earth connection to stop the normal (for EMI filters) leakage current from tripping the RCD

john