petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
Working up a quote for a new project.
It will have about a 3 MVA transformer (4160 D to 600/347 wye) feeding a switchboard with I think a 4000 A air breaker and bus work to feed four pieces of equipment downstream that will each have their own 1200 A MCCB.
Is there any advantage to making the neutral/ground bond at the transformer as opposed to in the switchboard?
I have asked the switchboard manufacturer to make the air breaker LSIG. Does this cover the requirement to have GF protection for equipment when the OCPD exceeds 1000 A? At present the one line I have from the engineer that laid it out shows two 1600 A fuses but no GF protection at all. Pretty sure it is needed.
Would it make sense to have GF on the 1200 A MCCB as well?
The switchboard vendor is suggesting cable bus to make all the connections. I am not familiar with this product. I have always seen ladder style trays used. Any opinions on cable bus?
Outdoor, if that matters any. Cost matters, but not as much as it might.
It will have about a 3 MVA transformer (4160 D to 600/347 wye) feeding a switchboard with I think a 4000 A air breaker and bus work to feed four pieces of equipment downstream that will each have their own 1200 A MCCB.
Is there any advantage to making the neutral/ground bond at the transformer as opposed to in the switchboard?
I have asked the switchboard manufacturer to make the air breaker LSIG. Does this cover the requirement to have GF protection for equipment when the OCPD exceeds 1000 A? At present the one line I have from the engineer that laid it out shows two 1600 A fuses but no GF protection at all. Pretty sure it is needed.
Would it make sense to have GF on the 1200 A MCCB as well?
The switchboard vendor is suggesting cable bus to make all the connections. I am not familiar with this product. I have always seen ladder style trays used. Any opinions on cable bus?
Outdoor, if that matters any. Cost matters, but not as much as it might.