Wuhan GDZX Power Equipment Co., Ltd sales@gdzxdl.com 86--17362949750
The transformer on-load tap changer tester is a specialized diagnostic instrument specifically designed for the transformer on-load tap changer (OLTC)—the only mechanical component in a transformer that frequently operates under load and is also one of the components with the highest failure rate. Its main applications include:
The tester collects electrical and mechanical signals when the switch operates and converts them into visualized waveforms and data, thereby providing insight into its internal state.
| Testing Items: | Measurement Principle | Typical problems that can be detected include: |
|---|---|---|
| 1. Transition Waveform Analysis (Core) | Measure the transition resistance and contact voltage/current waveforms during the switching process. | Contact erosion and poor contact; abnormal transition resistance; and switching program errors (such as double breaks and bridging time). |
| 2. Motion Timing Measurement | Record the time points and sequence of contact opening and closing. | Mechanical jamming and wear of the transmission mechanism; spring fatigue; and drive motor failure. |
| 3. Dynamic Resistance Measurement (DRM) | Measure the change in contact resistance of the main current-carrying contact throughout the entire operation. | Core defects such as main contact burnout and insufficient contact pressure are highly sensitive. |
| 4. Vibration and Acoustic Analysis (Advanced Function) | Capture the mechanical vibration signal during operation using a high-frequency vibration sensor. | Purely mechanical faults such as internal loosening, component deformation, and lack of lubrication are important supplements to electrical testing. |
| Value level | Specific benefits include: |
|---|---|
| Security | Preventing catastrophic failures: Early detection of contact welding, insulation deterioration, and explosion risks to avoid transformer damage and power grid accidents. |
| Economic aspects | Cost reduction and efficiency improvement:
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| Operations and maintenance level | Enhancing intelligence:
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