Recently we have a failure of a support insulator in the secondary bank cubicle of an outdoor type metalclad switchgear. The insulator which is an epoxy resin type provides support to the busbar where the power cable terminates. An electrical discharge chipped of the side portion of the...
One of the major requirement of our utility company is to require prospective power transformer suppliers to submit a type test report performed by an independent testing company like KEMA or CESI. The particular test that we are interested is the full short circuit test done either at KEMA or...
Recently we have a failure on the 34.5kV cap and pin bus support on our substation. The substation is already old (more than 25 years old) and we read thru posts in the internet that the porcelain cap and pin type insulators are already being being replaced by other utilities due to their design...
Transformer winding temperature indicator (WTI) zero temperature trip. Recently, our transformer WTI made by MSRT Terman tripped swhen the capillary tube leaked and temperature reading dropped to zero. We did not know this feature of the WTI thus we opened it and found that the design would...
