Anyone familiiar with BOLTSWITCHES?

Status
Not open for further replies.
titan1021

titan1021

Senior Member
Location
Northern California
I'm bidding a job where the sub-feeds are fed from Boltswitches at the main service. I didn't want to shut them down to pull the Boltswitch out while I was onsite, and now I am kicking myself because I can't figure out if the damn things use fuses or not. This is the first time I've come across them, my question is whether they utilize replaceable fuses. The sub-feed that I am dealing with is currently fed from a Boltswitch rated at 200amp 3 phase, I need to fuse it at 100a if possible to accommodate a new 75kva 480v transformer that will be feeding a new 200amp 208Y/120v sub-panel. I have searched online and haven't had much luck. The manufactures website says they use Class-T fuses but doesn't show them in place. Found the image below but it doesn't look like there is enough room for fuses. Any advice would be greatly appreciated.

Thank you.
Boltswitch-1rev.jpg

Boltswitch 200a rev.jpg
 
Class T pullouts are pretty common in my area. I believe the smallest T fuse you can get for a 200 amp pullout is 110 amps. For a 75KVA transformer I would thing you would want at least 110 or 125 amp fuses.
 
curt swartz said:
Class T pullouts are pretty common in my area. I believe the smallest T fuse you can get for a 200 amp pullout is 110 amps. For a 75KVA transformer I would thing you would want at least 110 or 125 amp fuses.
Click to expand...


Apparently from what I've read you don't have to go + 125% on the transformer feed but it is a good idea for inrush. I wasn't sure if this Boltswitch used fuses and what amperages might be available. I'm at 86.6a at 480v, plus the 125% gets me too 108.25 so 110a fuses should be good.

Thank you for the advice!
 
RYCO switchboards & metering switchboards use them & RYCO is quite common for commercial metering around here.
 
Status
Not open for further replies.
Top