Learn how to test a transformer: insulation resistance, TTR, winding resistance, polarity, continuity, and dielectric checks.

Omicron has introduced a way to test current transformers at all lifecycle stages by using a testing method called "the modeling concept". The "traditional" way of testing a current transformer is to ...

So you have an old tube-type transmitter as a backup. It ran perfectly when you last turned it on two years ago to substitute for your then-ailing solid-state main transmitter. Now you need it again.

Voltage transformers (VT) are used in electrical grids for metering and/or protection purposes. The high requirements regarding their precision demand a calibration ...

I see techs in the field get the most frustrated when they have a low-voltage short they can’t seem to locate. The challenge techs face with low voltage diagnosis is a combination of poor process and ...

In the 2017 National Electrical Code (NEC), there are plenty of tap rules in Sec. 240.21 and Sec. 240.92 for circuits not more than 1,000V. The same is true for transformer secondary conductor rules.

Violations of the National Electrical Code (NEC) regarding transformers are often encountered while performing electrical plan reviews. There are far too many NEC requirements to explain in just one ...

The flyback topology is a versatile, widely used, switched-mode power-supply design with some interesting characteristics that brings performance and BOM advantages to many applications. The flyback ...