Most are either nuts on studs or tapped holes in the bus, but I think there are some that are bolts and nuts.
Thanks. I'm asking how you access the bolts/bus to unbolt? Remove cover from rear?
Why is lockout tag out required when removing breaker? What exactly is that...i have heard of it...LOTO
You have to de-energize the equipment and then lock it out to prevent anyone from re-energizing the equipment while it is being worked.
Have never seen one where you needed rear access.
So how do you access the bus/bolts.
Remove the dead front.
What's the dead front ? A blank panel?
There are a number of designs. Do you have pictures of the switchboard? If not, the make and model?
I called it the gut cover. Covered the breakers.
I'll get
They equipment had a built-in overhead traveling hoist that after you used a 3/8" speed wrench to crank.out enough to open contacts you hung on a bracket to bottom of circuit breaker after you pull it all the way out. then would lower it ( or raise it if is was low to the ground ) to a cart. Was told these breakers cost more then we made in a year. Had a three to five line display that you could access volts, ampere, power factor & other items. When we performed weekly walk thru of every 13,200 & 4,160 volt switchgear room we had to record line voltage & ampere from them. A coup!e of times we had problems with the incoming utility voltage bring a little low affecting some thing like MRI'S or maybe CAT Scans.
Most bolt-in breakers are accessible by removing the deadfronts. I-Line panels are a little different. There are flanges on the breakers that screw the breakers to the housing and you use a screwdriver to pry the breakers on and off the bus.
