LAP Year 2 Week 2 Transformer Banks

What is the function of the Lighter Transformer of a bank with a Delta or Open Delta secondary?

Vectors are associated with the ______ of a transformer.

• the operation or function of a transformer.

• the color of a transformer.

• the weight of a transformer.

• the size of a transformer.

Which of the following banks requires the primary Wye-point to be floated (ungrounded)?

Transformers may be connected in parallel to increase capacity or give temp service while working on perm transformer. True or False?

• True

• False

Angular displacement becomes important when ______ transformer banks.

• connecting

• installing

• removing

• testing

Which of the following banks should the primary Wye-point to be "tied" (grounded)?

If the impedances of the transformers in a bank are not the same:

• The transformers will operate efficiently.

• The transformers will share the load unequally.

• The transformers will have the same voltage drop.

• The transformers will have the same power factor.

Open banks are approximately _______ % as efficient as closed banks.

• 66%

• 50%

• 75%

• 80%

It's important to parallel the secondary coils of a transformer for Wye secondary connections to utilize the full KVA. True or False?

• True

• False

The power leg is located _______ coils from the neutral on a Delta or Open Delta secondary.

• 1.5

• 2

• 2.5

• 3