Hi,
I'm a technician in a factory and have been tasked with sorting the lights out. We have approximately 60 x 250 w single phase halogen lights which I would like to control via contactors. Without going into detail the following is my take on things:
I've got a basic design where I have 3 phase plus neutral coming into a control box, this would then be split into 6 single phase feeds - two from each leg of the 3 phase feed. Each single phase supply would feed one contactor which in turn would switch 10 lights (6 contactors - 60 lights). For load balancing each leg of the 3 phase supply would therefore feed the same number of lights (20 lights each).
Each radial light circuit would be protected by a B6MCB. The single phase feeds (one per contactor) would be protected by a B25MCB each.
Should I be looking at protecting the incoming 3 phase feed with a 3 pole plus neutral MCB or should a simply fit 3 individual fuses on the 3 lives??
I understand that if I use a 3 pole plus Neutral MCB if one phase is overloaded the whole breaker will trip. If I use 3 individual fuses and one blows wont the remaining phases be unbalanced??.
Any thoughts would be appreciated. I
Hope I haven't lost anyone lol!!
regards
I'm a technician in a factory and have been tasked with sorting the lights out. We have approximately 60 x 250 w single phase halogen lights which I would like to control via contactors. Without going into detail the following is my take on things:
I've got a basic design where I have 3 phase plus neutral coming into a control box, this would then be split into 6 single phase feeds - two from each leg of the 3 phase feed. Each single phase supply would feed one contactor which in turn would switch 10 lights (6 contactors - 60 lights). For load balancing each leg of the 3 phase supply would therefore feed the same number of lights (20 lights each).
Each radial light circuit would be protected by a B6MCB. The single phase feeds (one per contactor) would be protected by a B25MCB each.
Should I be looking at protecting the incoming 3 phase feed with a 3 pole plus neutral MCB or should a simply fit 3 individual fuses on the 3 lives??
I understand that if I use a 3 pole plus Neutral MCB if one phase is overloaded the whole breaker will trip. If I use 3 individual fuses and one blows wont the remaining phases be unbalanced??.
Any thoughts would be appreciated. I
Hope I haven't lost anyone lol!!
regards
