OhhhMy
DIY
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Hi! I'm new here, so, please, be gentle...
Decided to add some extra features to my old and simple barn's electric system to make it safer and measure the consumption. It's a three phase 230/400 volt line. The neutral, as far as I know, is grounded at the step-down transformer. I don't have a separate earthing anywhere.
Did my best at drawing the wire paths of my not-so-good-looking system, hope you can follow it. The power goes from above in to the voltage protector, then to the energy meter, then to my problem zone RCCB, from which wires go to a cable Nr.1 and to two circuit breakers. The neutral line has an insulated connecting rail after the RCCB. And maybe it's worth mentioning, that the neutral is also connected to some three phase electric motor housings at the end.
I can switch on some three phase consumers without RCCB tripping, but, when I try to power on the angle grinder, the RCCB turns off immediately. Interesting, that there is a very old welding transformer, which can be operated from two lines (380V) without any problem, but it triggers the RCCB, when connected to a single phase (230V).
Cables have no visual damage and the multimeter does not show any resistance to the ground.
Can't figure it out- is the RCCB not good or is it me being out of order...?
Any advice, please?
Decided to add some extra features to my old and simple barn's electric system to make it safer and measure the consumption. It's a three phase 230/400 volt line. The neutral, as far as I know, is grounded at the step-down transformer. I don't have a separate earthing anywhere.
Did my best at drawing the wire paths of my not-so-good-looking system, hope you can follow it. The power goes from above in to the voltage protector, then to the energy meter, then to my problem zone RCCB, from which wires go to a cable Nr.1 and to two circuit breakers. The neutral line has an insulated connecting rail after the RCCB. And maybe it's worth mentioning, that the neutral is also connected to some three phase electric motor housings at the end.
I can switch on some three phase consumers without RCCB tripping, but, when I try to power on the angle grinder, the RCCB turns off immediately. Interesting, that there is a very old welding transformer, which can be operated from two lines (380V) without any problem, but it triggers the RCCB, when connected to a single phase (230V).
Cables have no visual damage and the multimeter does not show any resistance to the ground.
Can't figure it out- is the RCCB not good or is it me being out of order...?
Any advice, please?
