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Got a few questions regarding generators. I installed one a good few years ago but it was nowhere near the size of this one. The proposal on this job is to install a large 165kVA generator for day use to run heavy loads in a packing plant as well as living accommodation. There will then be a switchover at night on to a smaller 40kVA generator which will only power the living accommodation once the packing plant has shut down. Reason being the big generator isn't happy running at lower loads. There is no mains supply to this premises btw.
I know the generators have to be earth staked but i'm unsure of what size cable to use between the generator and the stake. Also with regards to the changeover switch what size will it have to be. If i've worked it out right it should need to handle somewhere in the region of 270A. Are there changover switches out there that will handle being operated under load. Also how will the motors in the packing plant take the on-off-on and slight phase shift experienced on switchover.
Just looking for some advice as this is out of the normal scope of work i undertake. I have worked with loads as high as this before so understand the importance of safety and proper connection of terminals however i am not au fait with everything relating to this subject. Just one final note, the generators will not be running in tandem so i don't need to worry about getting them running perfectly in phase with each other though i will obviously confirm phase rotation is correct before bringing everything online.
Not a DIY subject i know but there are electricians on here who work in the industrial sector who may be able to help.
I know the generators have to be earth staked but i'm unsure of what size cable to use between the generator and the stake. Also with regards to the changeover switch what size will it have to be. If i've worked it out right it should need to handle somewhere in the region of 270A. Are there changover switches out there that will handle being operated under load. Also how will the motors in the packing plant take the on-off-on and slight phase shift experienced on switchover.
Just looking for some advice as this is out of the normal scope of work i undertake. I have worked with loads as high as this before so understand the importance of safety and proper connection of terminals however i am not au fait with everything relating to this subject. Just one final note, the generators will not be running in tandem so i don't need to worry about getting them running perfectly in phase with each other though i will obviously confirm phase rotation is correct before bringing everything online.
Not a DIY subject i know but there are electricians on here who work in the industrial sector who may be able to help.