Product introduction
The transformer on-load tap-changer tester is a specialized testing device used for performance evaluation of the on-load tap-changer in power transformers. It is capable of conducting comprehensive tests on the switching performance of the on-load tap-changer during transformer outage maintenance or preventive testing, providing reliable data for equipment condition assessment, fault diagnosis, and maintenance planning.
The on-load tap changer is the only moving part connected with the transformer circuit, so more and more attention has been paid to the detection of the on-load tap changer.In the electrical equipment handover and preventive test regulations, it is required to check the action sequence of on-load tap changer, measure switching time, etc.This device is mainly used for measuring the transition waveform, transition time, transient resistance of transformer on-load tap changer, three-phase synchronism, etc.
Technical parameters:
The output current | 1.0A、0.5A | |
測定範囲 | Transition 抵抗 | 0.5Ω～20Ω(1.0A)、0.5Ω～40Ω(0.5A) |
Transition time | 0～250ms | |
Accuracy of 測定 | Transition 抵抗 | ±(5% reading +3 words) |
Transition time | ±(0.1% reading +3 characters) | |
環境温度 | -10℃～50℃ | |
環境湿度 | ≤85%RH | |
動作電源 | AC220V±10% | |
電源周波数 | 50±1Hz | |
ストレージ | U disk storage, local storage | |
全体寸法 | 345mm×295mm×175mm | |
楽器の重量 | 5kg | |
特徴：
1. The instrument has a lightweight design with a high output current.
2. With dual current outputs, it offers a broader testing range and superior stability.
3. It can automatically calculate both transition resistance and transition time values.
4. Equipped with a robust protection circuit, ensuring strong reliability.
5. The 5.7" large LCD display makes it easy to operate directly on-site.
6. With USB flash drive storage capability, you can save more data waveforms.
7. The independent operation of the keyboard and one-key flying shuttle allows for faster and more convenient instrument operation.
Application Scenarios
Substation transformer maintenance and condition assessment — During annual overhauls, preventive testing, and condition-based maintenance in substations, test the on-load tap-changer for transition resistance, switching time, and operating waveforms. Promptly identify contact wear, poor contact, and mechanical faults to ensure safe equipment operation.
Power transformer factory performance testing — After transformer manufacturing is completed, perform comprehensive performance tests on the on-load tap-changer to verify that the switching action, transition resistance, and mechanical synchronization meet the technical requirements, ensuring product quality before delivery.
Large power transformer installation acceptance — In newly built or expanded substations, perform on-site testing of the on-load tap-changer after transformer installation is completed, confirming that no mechanical damage occurred during transportation and installation, providing a basis for formal commissioning.
Power plant main transformer maintenance — Applicable to thermal, hydro, wind, photovoltaic, and nuclear power generation enterprises, performing periodic testing of main transformer on-load tap-changers to evaluate operating performance after long-term operation and reduce the risk of equipment failure.
FAQ about Transformer On-Load Tap-Changer Tester
What is the difference between a transformer on-load tap-changer tester and a standard loop resistance tester?
A: A transformer on-load tap-changer tester focuses on evaluating the performance of the on-load tap-changer during the dynamic switching process, capturing and analyzing data throughout the entire switching operation. In contrast, a standard loop resistance tester is primarily used to measure static contact resistance and cannot reflect the dynamic changes that occur during tap-changer operation. Therefore, the two instruments are suited for different testing scenarios and cannot replace each other.
Which equipment and scenarios are suitable for the transformer on-load tap-changer tester?
A: This tester is suitable for on-load tap-changer testing on power transformers, distribution transformers, and special transformers. It can be widely used in scenarios such as factory inspection, on-site installation acceptance, periodic preventive testing, condition-based maintenance, fault diagnosis, and performance verification after major overhauls, providing reliable data support for the full lifecycle management of equipment.
What test parameters should be focused on when using the transformer on-load tap-changer tester?
During testing, key parameters such as transition resistance, switching time, operating waveforms, three-phase synchronization, and switching continuity should typically be monitored. These data comprehensively reflect the mechanical operation and electrical performance of the tap-changer, helping to accurately determine whether the equipment has abnormalities or performance degradation.
