Transformers

Question 1

Impedance must be how close when paralleling or banking transformers

Answer 1

10%

Question 2

-TRUE OR FALSE-

Two cutouts and arresters are needed on a wye connected transformer

Answer 2

False

Question 3

‘TRUE OR FALSE-

A 250 KVA transformer would have an additive polarity

Answer 3

False

Question 4

Name the types of transformer banks you can make with 2 or 3 transformers

Answer 4

Open: (wye-delta), (delta-delta)
Closed: (wye-wye), (wye-delta), (delta-wye), (delta-delta)

Question 5

What does CSP mean?

Answer 5

Completely Self Protected Transformer

Question 6

-TRUE OR FALSE-

Series can happen when you contact two current carrying sources at the same time.

Answer 6

True

Question 7

What is the range of most transformer tap changers?

Answer 7

95%-105% to increase voltage lower the taps to decrease voltage raise the taps

Question 8

What is an autotransformer?

Answer 8

It is a one coil transformer.
The coil is used for both the primary and secondary.
Small-efficient transformer.

Question 9

Define a watt

Answer 9

The power of one amp flowing under the pressure of one volt