Why Open Circuit Test Is Performed On Low Voltage Side. In this test normal voltage is applied on the low voltage side at rated frequency and high voltage side is open condition that means there is no load in the transformer. The low-voltage LV winding is shorted.
Furthermore using standard instruments more accurate results can be obtained. No load test on a transformer is to measure its. Involves less core loss 17.
The open circuit and short circuit test are performed for determining the parameter of the transformer like their efficiency voltage regulation circuit constant etc.
The circuit diagram for open circuit test is shown in the figure below. Therefore this test named an open circuit test. Transformer Testing-Open Circuit Test Lesson 10_et332bpptx 30 Open circuit test finds R fe and X m - core losses and magnetizing reactance Test Set-up and conditions P wattmeter A ammeter V voltmeter Test performed on low voltage side with HV. Note that the open circuit voltage appears when the current waveform changes polarity from positive half cycle to negative half cycle.
