Hello, all!
I am wondering if anyone has any info on GE type U bushings (Cat# 11B575BB G7)
I have 3 of them (from 1971 but unused). They were stored horizontally for 40 years and I am hoping to find a drawing or other literature.
Thanks!
Chad
An interesting item....
I was handed some papers regarding ground testing for an existing peak generating facility. One set of documents was a test using the slope method, no problem. The other document is something I have never seen before and I can't find anything in IEEE about it. It gives...
Hello all, I have another interesting event to pass along..
Recently I was testing a 15KV Cable (EPR 133% insulation). This cable was a combination of old and new cables spliced together and terminated at several switches, with a total length of about 5,000 feet. The customer requested a test...
The AC pro is a good option but I would keep in mind the pitiful reputation (well deserved) that FPE breakers have. I would recommend an aggressive maintenance/inspection interval for this equipment as mechanical operating time for this breaker is not improved by any trip unit. ABB makes a...
Hello all, I have a question regarding 15KV metal-clad switchgear. The facility I am at this week is using ABB 15KV switchgear and supplying it with a nominal voltage of 16,600 volts. I cannot find anything in IEEE that addresses justification for using this voltage on 15KV gear. Any help would...
I am a "by the book" power system service manager. I do not have an opinion on the proper way to perform electrical work, I follow established procedures and standards. I recently began a project, installing grounding balls into 34.5 kv switchgear to make grounding easier. I did the first three...
Are you talking about periodic maintenance on electrical equipment?
Chad Snyder
Director of Operations
American Power Technology
http://www.ampowertech.com
A very simple way to accomplish this is to use a Megger brand digital 3 phase TTR. The turns ratio test, of course must be performed anyway, and this unit also displays excitation current data at the same time. 2 birds, 1 stone.
Chad Snyder
Director of Operations
American Power Technology...
I agree that all connections must be isolated to perform this test, yes humidity is a big factor, and there is also a temperature correction factor that must be applied.
Chad Snyder
Director of Operations
American Power Technology
http://www.ampowertech.com
A good reference would be one of the most common electromechanical relays around. It is the IAC relay from GE. Figure 7A on page 7 of this PDF shows an operating curve for the instantaneous function. Keep in mind that total operating time for the circuit includes mechanical operating time of the...
