how to test transformer winding resistance?

To test transformer winding resistance, use a digital multimeter (DMM) set to the resistance (ohms) mode. Disconnect the transformer from the circuit to avoid interference. Connect the DMM probes to the winding terminals, ensuring a good contact. Record the resistance reading. Compare the measured value with the manufacturer’s specifications to determine if the winding is within acceptable limits. This test helps identify issues like shorted turns or poor connections.