Nature of load

Type of cooling

Phase sequence

Class of insulation used

Use of laminated core

By reducing core thickness

By using grain oriented core

Use stepped core arrangement

Pulse transformers

Ignition transformers

Potential transformers

Constant voltage transformers

Using silica gel

Using transformer oil

Using sodium chloride

Using ammonium jelly

Hysteresis loss only

Eddy current loss only

Copper loss

Core loss