How to install station class lightning arrestors at an oil filled transformer?
How to install station class lightning arrestors at an oil filled transformer?
(OP)
At the bottom of the picture are the arrestors that we are to install at this transformer.
I'm inquiring of the vendor right now asking for a detail, but I thought this forum could give me some quick advice.
There is a plate included that matches up to the bolt patterns at the back of the panel.
These are 18kV station class arrestors.
I'm inquiring of the vendor right now asking for a detail, but I thought this forum could give me some quick advice.
There is a plate included that matches up to the bolt patterns at the back of the panel.
These are 18kV station class arrestors.






RE: How to install station class lightning arrestors at an oil filled transformer?
RE: How to install station class lightning arrestors at an oil filled transformer?
RE: How to install station class lightning arrestors at an oil filled transformer?
I guess if ABB designed the installation, it must meet necessary NEMA standards for clearance, but it seems that one of the arresters is awfully close to the thermostat. It's probably OK for 13.8 kV. The photo shows 4-hole stud terminals on the arresters. You could increase clearances by using smaller terminals. It will be tricky terminating the cable to the bushings. The 2-hole pads are vertical which means that a terminator with a 2-hole pad will have to be vertical. The middle arrester is directly below the bushing; how to you get the terminator past the arrester?
RE: How to install station class lightning arrestors at an oil filled transformer?
Do you daisy chain the bottoms together to ground? And on the line side...I guess you lug a short #4 jumper a and connect between the the HV bushing and its corresponding arrestors? If so why doesn't this come preasssembled?
I'm not sure how they will finagle the cables to get them terminated.
RE: How to install station class lightning arrestors at an oil filled transformer?
RE: How to install station class lightning arrestors at an oil filled transformer?