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A hipot tester is a test instrument that can be used to evaluate insulation resistance by measuring the pressure in the transformer tank.

Noting the appearance, smell, and sound of a transformer is vital to a good inspection.

When replacing a 25 Hz transformer, two transformers with a(n) ___ rating matching the 25 Hz transformer can be connected in series.

Because industrial loads may cause power quality problems, industrial facilities may want to isolate their ___ loads from their industrial loads.

Dust buildup on a transformer can cause catastrophic failures.

Relays are protective devices that take a transformer off-line in the event of a(n) ___.

The actual value of the insulation resistance at a given time is less important than the trend over time.

Infrared thermography is used to identify the presence and amount of harmonic currents that cause overheating and damage to transformers.

The general rule for transformers rated 600 V, nominal, or less is to protect the primary windings of the transformer at not more than 200% of the rated primary current of the transformer.

During an insulation resistance spot test, the test voltage is applied for _____.