Volta
Senior Member
- Location
- Columbus, Ohio
Assuming the service disconnects (two) have not been operated in decades, once the source has been disconnected by the POCO, what should be considered for minimal maintainence to assure that the disconnect can be reliably operated in the future? For better than minimum maintenance?
Arc-flash calcs, PPE, and even remote switching can be in the safety list, but even with remote switching apparatus and personell safety assured we don't want damage to the exterior switchgear.
The info provided by the POCO in December is:
1. voltage --- 13.2Y/7.62KV
2. available fault current at that point in the system / at this point in time, --- 3285 Amps (LLL), 2320 Amps (LG)
3. wire size, --- #2 ACSR conductors
4. fuse types at pole, --- Kearney T
5. fuse sizes. - - - 100 Amps T
Each switch feeds a pad mounted transformer, perhaps 10 and 25 MVA or so.
Very possibly will contract someone specializing in this, but need to know what methods to expect anyhow.
Arc-flash calcs, PPE, and even remote switching can be in the safety list, but even with remote switching apparatus and personell safety assured we don't want damage to the exterior switchgear.
The info provided by the POCO in December is:
1. voltage --- 13.2Y/7.62KV
2. available fault current at that point in the system / at this point in time, --- 3285 Amps (LLL), 2320 Amps (LG)
3. wire size, --- #2 ACSR conductors
4. fuse types at pole, --- Kearney T
5. fuse sizes. - - - 100 Amps T
Each switch feeds a pad mounted transformer, perhaps 10 and 25 MVA or so.
Very possibly will contract someone specializing in this, but need to know what methods to expect anyhow.