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 |