Transformer Banks

Front

Open banks are approximately _____ % as efficient as closed banks

Back

57.7

Front

Why do we parallel that secondary coils of a transformer for WYE connected secondaries?

Back

To utilize the full rating of the coil

Front

Transformers rated ____ kVA and smaller, with a primary coil voltage rating of ____ Volts and below will be additive

Back

200kVA, 8660V

Front

When is angular displacement important?

Back

When paralleling transformer banks

Front

If the impedances of the transformers in a bank are different

Back

Bank will be de-rated

Front

The proper grounding electrode at a transformer location is

Back

Ground Rod

Front

What transformer bank requires the primary Wye-point to be floated? Options: WYE-WYE, WYE-DELTA, DELTA-WYE, DELTA-DELTA

Back

WYE-DELTA

Front

The primary side of a transformer is always the high voltage side

Back

False

Front

What is the purpose of the transformer core?

Back

Improves efficiency of transformer by concentrating lines of flux

Front

What is the purpose of the insulating fluid?

Back

To cool the core/ coil assembly