I
Inteificio
Hi,
I have been tasked with rewiring most of the machines in a factory.
Due to the age of the equipment and usage I believe residual current protection is a good idea.
This presents an issue with how they want them wired.
Currently we have cables hanging from the ceiling at multiple points of the production line.
The want rid of this and want each machine in the production line to power the next.
My idea is to fit a dist board at one end and feed them off each other.
The only issue I have is what do I rate the RCD as?
The easy approach is to fit a 30mA RCD as the incomer and feed everything off individual mccbs.
However I do not know if these machines will cause nuisance tripping.
So the short version of this question is how can I measure the residual current on a 3 phase machine?
I've seen a PAT tester that could do single phase, but nothing for 3.
At the moment, the best idea I have (which sucks) is to get a settable RCD and keep reducing the current until it trips. This obviously does not take in to account any fluctuations in the device!
So do any of the sparks know how to do this properly or have any advice to offer?
Thanks,
I have been tasked with rewiring most of the machines in a factory.
Due to the age of the equipment and usage I believe residual current protection is a good idea.
This presents an issue with how they want them wired.
Currently we have cables hanging from the ceiling at multiple points of the production line.
The want rid of this and want each machine in the production line to power the next.
My idea is to fit a dist board at one end and feed them off each other.
The only issue I have is what do I rate the RCD as?
The easy approach is to fit a 30mA RCD as the incomer and feed everything off individual mccbs.
However I do not know if these machines will cause nuisance tripping.
So the short version of this question is how can I measure the residual current on a 3 phase machine?
I've seen a PAT tester that could do single phase, but nothing for 3.
At the moment, the best idea I have (which sucks) is to get a settable RCD and keep reducing the current until it trips. This obviously does not take in to account any fluctuations in the device!
So do any of the sparks know how to do this properly or have any advice to offer?
Thanks,