Power Transformers 2 - Maintenance - Watch Instant Video

Training Sessions

Visual Inspection
Gas and Oil Testing
Tap Changers
Tap Changer Maintenance
Turns Ratio Test
Insulation Resistance Test
Training Sessions

Visual Inspection – 9 minutes
Lists the typical items checked during an inspection of a transformer’s exterior condition, sealing system, and cooling system.

Gas and Oil Testing – 8 minutes
Shows how to test: the gas in a power transformer for combustible gas, the gas in a power transformer for oxygen, and the insulating strength of the oil in a power transformer.

Tap Changers – 10 minutes
Explains what a tap changer is. States the function of a no-load tap changer and briefly describes how a typical no-load tap changer works. States the function of a load tap changer and briefly describes how a typical load tap changer works.

Tap Changer Maintenance – 3 minute
Identifies the steps for de-energizing, isolating, and grounding a power transformer. Lists the items typically included in a maintenance check of the physical condition of a load tap changer. Lists the items typically included in a maintenance check of the mechanical operation of a load tap changer. Lists the items typically included in a maintenance check of the electrical operation of a load tap changer.

Turns Ratio Test – 7 minutes
Explains how to test a transformer’s turns ratio.

Insulation Resistance Test – 14 minutes
Explains how to test a transformer’s insulation resistance.