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| Why are electrical transformers measured in KVA and motors in KW |
Why are electrical transformers measured in KVA and motors in KW
Welcome to the Electron Tips website. In this topic, we will learn about the reason for measuring electrical transformers in the unit KVA (kilovolt-ampere) and electric motors in the unit of kilowatt (KW).
Why electric motors are measured in KW:
An electric motor is an electrical device that consumes effective electrical power, which is why it is expressed in units of kilowatts or horsepower because it expresses the amount of electrical energy that the motor has benefited from, and it means the actual power used for mechanical purposes and expresses the actual performance of the electric motor (effective power), because Inefficient power will do nothing for the electric motor.
The reason for measuring electrical transformers in KVA:
Electrical transformers' primary role is to convert electrical voltages, as they do not consume electrical energy as much as electric motors consume. In other words, electrical transformers convert electrical voltages from one level to another without changing the actual power and energy of the transformer. This is why electrical transformers are measured in KVA because it refers to the total power of the electrical transformer.
Another reason is that electrical transformers have many losses that cause a loss of electrical energy, which is the ineffective power, copper losses and iron losses, which generally depend on the electrical current and voltage of the transformer, which are measured in kilovolt-amperes (KVA).