Difference Between Power Transformer and Distribution Transformer

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Difference Between Power Transformer and Distribution Transformer
Difference Between Power Transformer and Distribution Transformer

What is a Power Transformer?

Fundamentally, a power transformer performs the function of power transmission and receiving purposes. Subsequently, a power transformer’s voltage ratio varies between 756kV to 11kV. When compared to distribution transformers, a power transformer will often have a higher MVA rating.

What is a Distribution Transformer?

Unlike a power transformer, distribution transformers serve for circulation purposes. Such equipment will, therefore, bring down (step down) the voltage and incidental level of a power transmission line to a predetermined scale. This predefined level is also referred to as the end-user safety level, either for domestic consumers or for industrial purposes.

Though similar in stature to a power transformer, a distribution transformer’s voltage range varies between 33kV to 430V.

Difference Between Power Transformer and Distribution Transformer

Power Transformer

Distribution Transformer

Power transformers are utilized in transmission networks with significantly higher voltage

distribution transformers function in distribution networks defined by lower voltages.

Power transformers available in the market have various ratings ranging from 400kV, 200kV, 66kV, and 33kV.

distribution transformers ratings range from 11kV, 6.6kV, 3.3kV, 440v, and 230 volts.

power transformers operate on full load rating with minimal load fluctuations

Distribution transformers function at a significantly lower load. The variation in the loads varies substantially.

The power distributors design takes into account maximum efficiency (100%), computed using the ratio of power output/input.

Distribution transformers will have a maximum efficiency variance range of between 50%-70%, calculated based on All Day Efficiency.

Power transformers are a common feature in power generation stations and transmission substations.

 the installation of distribution transformers is mainly in distribution stations, from this point, power is distributed for industrial or domestic purposes.

Power transformers are used for rating above 200 MVA

Distribution transformers are used for rating less than 200 MVA

Larger in size as compared of distribution transformers

Smaller in size

Copper and iron losses take place throughout the day

Iron losses take place for 24 hours and copper losses are based on load cycle

 

READ HERE  Losses In Transformers ; Hysteresis Loss, Eddy Current Loss, Efficiency

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