Why Transformer rating in KVA and motor rating at KW ?

ট্রান্সফরমার রেটিং

Transformer ratings in KVA and motor rating at KW why???

Why Transformer rating is done in KVA and motor rating is done at KW today. Today’s writing for those who are electrical engineers is very important. Because it’s almost common questions in your interview. This question will be available from the Varsity Life interview to the service interview.  So get rid of it and find out today’s text.

There are two questions that we have today with Transformer rating KVA and Motor Rating KW

  1. Why the Transformer rating is in VA, KVA, MVA?
  2. Why do the motor’s ratings do not write in VA, KVA, MVA and write on KW?

Let us know the answer to both the questions on the subtext,

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Why the Transformer rating is in VA, KVA, MVA?

To know the answers to this question, we need to know a little about our transformer loss. There are two types of Transformers: Iron Loses or Core Loss or Insulation Loss and Copper Loss.

Here the transformer copper depends on the laser current (I²R) and the core is dependent on the loss voltage. It implies that the load using the current. Load factor depends on the load factor. The load here can be either inductive or capacitive or any kind of resistive. We all know that there are loads of different types of transformers that we use.

The type of load is different because of the factors of the power factor and different types. We can never get out without the power factor.

We know that power equation W = 3VICOS∅ COS∅. We can get the value of W when the value of the equation is the value of the side. Here the unit of voltage is V and the current unit is A and the power factor is not a single unit. So we get the VA from the equation. If we have a bigger value then we can write MVA when KVA is larger and more. That is why the Transformer rating is written in VA, KVA, MVA.

Why do the motor’s ratings do not write in VA, KVA, MVA and write on KW?

We all know that motor transforms electrical power into mechanical power. Getting mechanical is an active power, ie effective power. And what is written in the motor’s nameplate is that the output of the motors is mechanical power. This means that what is written on the motors is not electrical power nor mechanical power. That is why the rating of the motor is written at KW.

Again, we know the motors are designed to be the power factor. So it is very easy to calculate the load of the motors load. For this reason, the unit’s power unit is captured in the nameplate and if the value is larger the KW is written.

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