In our industries, electric motors are common elements. But how can we ensure they are Fully available? At that time, stator winding resistance test is a good helper to us.

May it can help you.

Winding resistance tester—it can conduct this test. Let us know more about this tester.

A winding resistance tester is primarily focused on measuring the resistance of motor windings. It provides a direct assessment of the integrity and continuity of the winding conductors. In various industrial applications, stator winding resistance is critical for ensuring the reliability, safety, and efficiency of electric motors. It can detect potential issues early and facilitate proactive maintenance. At the same time, it also contributes to minimizing downtime, optimizing performance, and maximizing equipment lifespan. Winding resistance tester can measure it precisely, we can through the result to judge if the motors is usable.

And its operation is simple. They are often used for routine testing and maintenance tasks. It is enough to conduct a quick assessment of winding resistance suffices. And it always is suitable for routine maintenance applications where comprehensive diagnostic capabilities are not required.

What about more complex tests?

Of course, in many industries, just conduct a quick assessment of winding resistance suffices is not enough. At that time, we can choose another instrument to do more complex work. We can choose winding analyzer to complete these complex tests. It is more complex and expensive than winding resistance tester, but it can provide detailed insights into motor winding condition. These conditions including detecting faults such as turn-to-turn shorts, coil-to-coil shorts, ground faults, and insulation breakdowns. In addition, they are capable of performing more advanced tests like frequency response analysis (FRA) or dissipation factor tests. And they can also offer connectivity options for integration with computer systems or networked environments. Although winding analyzer is more expensive and complex compared to winding resistance testers, it has more advanced functionality and capabilities.  You can select the machine which you need according to the specific test content.

How to conduct stator winding resistance test?

You can choose adapted tester for you according to the text above.

And then you must allow the following steps:

Prepare the Motor: please ensure the motor is de-energized and disconnected from the power source. Lock and tag out the motor to prevent accidental re-energization.

Identify the Stator Windings: Locate the terminals of the stator windings. These are usually accessible via terminal boxes on the motor.

Disconnect the Windings: Disconnect the stator windings from any external circuits or components to isolate them for testing. Label the wires if necessary to ensure correct reconnection later.

Set Up the Resistance Tester: Configure the resistance tester according to the specifications provided by the motor manufacturer. This includes selecting the appropriate range or scale for the expected resistance values.

Connect the Test Leads: Connect the test leads of the resistance tester to the terminals of the stator windings. Use Kelvin clips or probes to ensure good contact and minimize lead resistance.

Take Measurements: Record the resistance readings for each phase of the stator windings. Depending on the motor configuration, you may have multiple phases to test. Before recording the values, please ensure stable readings by allowing the resistance tester to stabilize.

Interpret the Results: Compare the measured resistance values to the manufacturer’s specifications or reference values.

Analyze: you can analyze the results to determine if further investigation or maintenance actions are necessary. if you want more precise result, you can ask experienced technicians or engineers for help.

Reconnect and Secure: When you complete the testing, remember to reconnect the stator windings to their respective terminals securely. This step is to prevent electrical hazards.

Safety Precautions: If you encounter any unusual or uncertain situations during testing, please ask for the qualified personnel or refer to the motor manufacturer’s documentation.

You can conduct a stator winding resistance test effectively by following these steps.