A transformer is a component with primary and secondary windings as its core. When using a multimeter for testing, it can be determined whether the transformer is damaged by detecting the winding resistance value Detection of Transformer Winding Resistance: The detection of transformer winding resistance mainly includes three aspects: detection of the resistance of the primary and secondary windings themselves, detection of insulation resistance between windings, and detection of insulation resistance between windings and iron cores or shells. Before detecting the resistance of the transformer winding, the winding pins of the transformer to be tested should be distinguished first
1 Adjust the range knob of the multimeter to the Ohm position, and place the red and black probes on the two pins of the primary winding or the two pins of the secondary winding of the transformer to be tested. Observe the display screen of the multimeter, and under normal circumstances, there should be a fixed value. If the measured resistance value is infinite, it indicates that there is an open circuit phenomenon in the measured winding
2 Adjust the range knob of the multimeter to the Ohm position, and place the red and black probes on any two pins of the primary and secondary windings of the transformer to be tested. Observe the display screen of the multimeter, which should be infinite under normal circumstances. If there is a certain resistance value or a small resistance value between the windings, it indicates that there is a short circuit phenomenon between the measured transformer windings
3 Adjust the range knob of the multimeter to the Ohm position, and place the red and black probes on the primary winding pins and iron core of the transformer to be tested. Observe the display screen of the multimeter, which should be infinite under normal circumstances. If there is a certain resistance value or a small resistance value between the winding and the iron core, it indicates that there is a short circuit between the measured transformer winding and the iron core
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