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

The new MG300 from Extech Instruments is a true-rms multimeter with a built-in insulation resistance tester. The instrument’s wireless data streaming provides added safety to users, who can monitor ...

Make sure you follow these steps for safe and accurate testing. Before actually conducting insulation resistance tests, you need to prepare for them. Here are some steps you don’t want to skip: • ...

Table 100.19 from ANSI/NETA MTS-2011 provides recommended test voltages for proof testing and field testing medium-voltage power circuit breakers and switchgear. These three tests should be in your ...