On-Load Tap Changer Analyzer/On-Load Switch Tester - Test Precautions and Features?

The test precautions and core features of the on-load tap changer tester are as follows:

I. Test Precautions

1. Safety Isolation and Discharge: Before testing, ensure the transformer is completely de-energized and fully discharge the oil chamber and windings of the on-load tap changer. Always disconnect the operating power supply of the switch body motor to prevent accidental starting.

2. Oil Level Check and Correct Wiring: Check that the on-load tap changer oil level is normal. The test leads should be directly and securely connected to the corresponding three-phase leads of the switch contacts or transformer bushings, ensuring good contact to reduce interference from contact resistance on the test results.

3. Synchronized Operation and Multiple Measurements: When starting the instrument for measurement, it is best to manually operate the electric mechanism of the on-load tap changer to ensure that the instrument recording is completely synchronized with the switch action. Multiple measurements should be performed for the same voltage regulation process (e.g., increasing one tap), observing whether the waveforms overlap to determine the stability of the operation.

4. Waveform Analysis and Key Focus: Focus on analyzing the switching waveform, paying attention to its smoothness and the presence of open circuits or breaks. The transition resistance value should be compared with the nameplate value or historical data; the three-phase resistance values should be balanced. Timing parameters (such as switching time and bridging time) should conform to standards.

II. Core Features

1. Precise Dynamic Process Capture: The core function is to sample and record the three-phase transition waveform, resistance change curve, and time parameters at high speed within tens of milliseconds of switching action, intuitively reflecting the dynamic performance of the switch.

2. Strong Potential Fault Diagnosis Capability: By analyzing the waveform, it can effectively diagnose potential mechanical and electrical faults such as contact erosion, asynchronous contact action, aging or breakage of transition resistance, and mechanism jamming.

3. Intelligent Judgment and Data Management: Modern instruments can automatically calculate key parameters and compare them with preset standards, providing a pass/fail judgment. Built-in large-capacity memory can save a large amount of waveform data, facilitating historical trend analysis and fault diagnosis.

Summary: This instrument is an effective tool for diagnosing the status of on-load tap changers. Its value lies in detecting latent faults early by recording and analyzing the dynamic waveforms of the switching process, thus preventing the switch from operating with defects. The core of its operation lies in safe power outage measures, correct wiring, and meticulous waveform analysis.

The MS-207T on-load tap changer tester is used to measure the transition waveform, transition time, instantaneous transition resistance values, and three-phase synchronicity of transformer on-load tap changers.

Main Unit: 1. Built-in precision constant current source with a complete and reliable protection circuit.

2. Can test with or without windings.

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