Differences Between Open Circuit Test and Short Circuit Test
OPEN CIRCUIT TEST |
SHORT – CIRCUIT TEST |
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also known as no – load test |
also known as Impedance test |
main aim is to calculate the iron loss and exciting current of the transformer |
main aim is to calculate the copper or winding loss and the impedance of the transformer |
primary winding is connected to rated voltage source |
primary winding is connected to low- voltage source |
secondary winding is open – circuited |
secondary winding is short – circuited |
voltmeter is connected across the primary winding to measure the applied voltage |
voltmeter is connected across secondary winding to measure secondary voltage |
ammeter is connected in series with the primary winding to measure primary current |
ammeter is connected in series with primary winding to measure short – circuit current |
Open and Short Circuit Test of Transformer
In this article, we will go through the Open and Short circuit tests of a Transformer. Open and short circuit tests are performed on a Transformer to evaluate its performance characteristics and parameters which mainly determine the Voltage regulation of the transformer, the Transformer’s efficiency, and the Equivalent circuit of the Transformer. They determine Iron and copper losses in the transformer. In this tutorial, we will go through the open and short circuit tests on a transformer with their circuit diagrams and an example and also we will tabulate the differences between the two.
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