Job Description:

• 1) Tests insulation, current resistance, loss of current, and performance of transformers and tests insulating strength of transformer oil, using electrical testing mechanisms: Attaches transformer wires to terminal board mounting various testing meters and to live wire for energizing transformer.

• 2) Adjusts testing-meter indicators at settings governed by test to be made and volt specifications on transformer tested, employing extensive knowledge of transformers.

• 3) Successively turns switches which control transmission of current through transformer to testing meters, such as voltmeter, ammeter, and ohmmeter, for testing insulation, resistance, and loss of current.

• 4) Notes action of circuit breaker which automatically stops flow of current if transformer does not react correctly to test applied.

• 5) Tests insulating strength of transformer oil by passing current through oil sample placed in box containing two electrodes.

• 6) Notes whether current will break down oil, causing arc between electrodes, actuating dielectric meter and indicating oil is of insufficient insulating strength.

• 7) Tests fuse strength by regulating switch and sending excessive current through transformer.

• 8) Diagnoses transformer defects and routes rejected transformers for repairs.