Classification of Transformer

CLASSIFICATION OF TRANSFORMERS

Transformers are classified on the basis of:

(i) Based on Duty they Perform:

 i. Power Transformer - for transmission and distribution purposes.

ii. Current Transformer - instrument transformer. (To measure current value).

iii. Potential Transformer - instrument transformer. (To measure voltage value).

(ii) Based on Construction:

i. Core Type Transformer.

ii. Shell Type Transformer.

iii. Berry Type Transformer.

(iii) Based on Voltage Output:

i. Step Down Transformer (Higher level to lower level).

ii. Set Up Transformer (Lower level to higher level).

iii. Auto Transformer (Can be varied from "0" to rated value).

(iv) Based on Applications:

i. Welding Transformer.

ii. Furnace Transformer.

(v) Based on Cooling:

i. Duty Type Transformer (Air Natural/Air Blast).

ii. Oil Immersed.

(a) Self cooled

(b) Forced air cooled

(c) Water cooled

(d) Forced oil cooled.

(vi) Input Supply:

i. Single Phase Transformer.

ii. Three Phase Transformer.

(a) Star-Star

(b) Star-Delta

(c) Delta-Delta

(d) Delta-Star

(e) Open-Delta

(f) Scott-Connection.