Transformer

Core type and Shell type Transformer Depending upon the type of construction used, the transformers are classified mainly into two categories i.e Core type and […]

Polarity Test On the primary side of a two winding transformer, one terminal is positive with respect to other one. At the same time ,one […]

Grounding Transformer The neutral or star point is usually available at every voltage level form generator or transformer neutral .However if no such point is […]

Choice of Transformer connections 1.Star-star(Yy0 or Yy6) connections:This type  of Transformer is most economical for small current and high voltage transformers. Advantages: The number of turns […]

Open-circuit Test(or No -Load Test) Open-circuit test is used to determine the : core(or iron excitation) loss,Pi No-load current ,Io shunt branch parameters Ro and […]

Transformer Efficiency Definition: The efficiency of Transformer(η) is defined as the ratio of useful power output to the input power,the two being measured in same […]

Voltage regulation Definition: Voltage regulation of a Transformer is defined as the change in magnitude of terminal voltage  or secondary voltage,when full load(rated load) of […]

Transformer on No load The transformer is said to be at no load when the primary of a transformer is connected to the source of […]

Ideal Transformer Definition:Certain idealizing assumptions are made for better understanding and for a very easier explanation of a practical transformer.A Transformer having these ideal properties […]

Emf equation When an alternating(sinusoidal) voltage is applied to the primary winding of a Transformer an alternating(sinusoidal) flux is produced in the iron core which links […]