Comments on: Transformer Sampling Danger

By: MIDWEST

MIDWEST — Tue, 29 Jul 2014 17:34:28 +0000

MIDWEST has extended transformer sampling valves into secure external enclosures. One must be very cautious doing this. It is much more than just a piping project. The concern is “no weepage” for decades into the future. Also, we find more deficiencies, many critical, from the transformer inspections during sampling, than we find from the oil sampling/testing. However, this in no ways suggests transformer oil sampling and analysis is unimportant. It is important. Tracking the results over time is important. And the deficiencies it finds can also be critical. But, so is the inspection by someone experienced in transformer field services. So, even with an external valve, take advantage on an opportunity to de-energize and perform a “hard focused” inspection of the transformer when convenient.

By: john hagaman

john hagaman — Wed, 16 Jul 2014 11:34:12 +0000

Your recommendation to sample during a scheduled outage is good, but you should add, at that time install a pipe and valve to bring the sample port outside the doors.

By: Arc Flash Guy

Arc Flash Guy — Wed, 12 May 2010 14:22:12 +0000

Trouble is many people aren’t aware of the dangers involved.

Of the some 2000 people a year injured in the US most don’t know how dangerous arc flashes are and some don’t even know they exist.