Transformer on Load

A transformer is said to be on load condition if an electrical load is connected to its secondary winding and a current circulates in the secondary winding circuit. The load connected across the secondary winding can be a resistive load or an inductive load or a capacitive load or a combination of the three. Therefore, the magnitude of the secondary winding current also called load current depends on the load impedance and secondary voltage (V2). Also, the phase angle between the secondary voltage and load current depends on the type of the load. For example, if the load is of inductive nature, the load current will lag the secondary voltage.

Operation of Transformer on Load

Theory of Transformer on Load and No Load Operation

In this article, we will study the theory of transformer on load and no load operation. A transformer is a static electrical machine used to increase or decrease the value of voltage and current in an electrical circuit. The transformer operates on the principle of electromagnetic induction and mutual inductance. A transformer typically consists of two copper winding and a magnetic core. The windings are named as primary winding and secondary winding. The input supply is connected to the primary winding and the output electrical supply is taken from the secondary winding. Hence, the secondary winding is one to which the electrical load is connected.

Let us understand the operation of a transformer on load and no-load conditions.

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Transformer on No-Load

A transformer is said to be operated in no-load condition if no electrical load is connected across its secondary winding terminals. In other words, when the secondary winding of a transformer remains open-circuited and no current flows through it, then the transformer is said to be in no-load condition....

Operation of Transformer on No-Load

Here is the operation of a transformer in no-load condition:...

Transformer on Load

A transformer is said to be on load condition if an electrical load is connected to its secondary winding and a current circulates in the secondary winding circuit. The load connected across the secondary winding can be a resistive load or an inductive load or a capacitive load or a combination of the three. Therefore, the magnitude of the secondary winding current also called load current depends on the load impedance and secondary voltage (V2). Also, the phase angle between the secondary voltage and load current depends on the type of the load. For example, if the load is of inductive nature, the load current will lag the secondary voltage....

Operation of Transformer on Load

Here is the operation of an electrical transformer operation under loaded condition:...

Conclusion

In conclusion, a transformer is a device used to change the levels of voltage and current in an electric circuit. A transformer when operated with open-circuited secondary winding, it is said to be in no-load operation and when it is operated with attaching a load across its secondary, it is said to be in on-load operation....

FAQs on Transformer on Load and No Load Operation

What is main difference between no load transformer and on load transformer?...

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