Product introduction
The Transformer On Load Tap Switch Tester is an indispensable tool for power system maintenance of transformers. By precisely measuring and analyzing the time parameters and dynamic resistance waveform during the OLTC switching process, it effectively assesses the switch's mechanical performance, electrical contact condition, and transition resistor health. It enables the timely detection of potential faults such as contact erosion/wear, jamming, spring fatigue, resistor aging, and timing errors, providing strong technical assurance for the safe and stable operation of transformers. Regular OLTC testing is a crucial part of preventive maintenance and condition-based maintenance programs.
Product Parameters
Technical parameters
| output current | ≥1A,3 channel |
| data sampling | sampling channel：6 channel |
| sampling frequency：10kHz/s | |
| Measuring range | transition resistance：0.5Ω～20Ω |
| transition time：≤250ms | |
| resolution | resistance：0.01Ω |
| time：0.1ms | |
| measurement precision | transition resistance：±(5%+3 digital) |
| transition time：±(0.1%+1 digital) | |
| Storage model | U disk storage,machine storage 1G |
| Dimensions | 350mm×230mm×200mm |
| hostweight | 5kg |
Conditions of Use
| Environment temperature | -10℃～50℃ |
| environment humidity | ≤85%RH |
| Working power supply | AC220V±10% |
| power supply frequency | 50±1Hz |
Advantages:
1. Comprehensive function: This tester can measure the transition time, transition waveform, transition resistance, three-phase synchronicity and other parameters of on load tap changers, providing users with comprehensive switch performance analysis.
2. Easy to operate: The instrument adopts a large screen dot matrix LCD display and a graded Chinese menu, which is intuitive and easy to operate. Users only need to press the function keys according to the prompts to perform measurements.
3. High degree of intelligence: The instrument has intelligent testing and result analysis functions, which can automatically identify faults in the waveform and mark them, making it convenient for users to further analyze and compare the waveform.
4. Strong anti-interference ability: The all aluminum alloy chassis and instrument are equipped with power noise filters and anti-interference circuits, which can reliably measure in sites with poor power quality and strong electromagnetic field interference.
5. Data storage and printing function: The instrument is equipped with an uninterruptible power storage device, which can store multiple sets of waveforms and data, and archive, retrieve, and analyze them at any time. At the same time, the instrument is equipped with a printer that can directly print test results.
Main application scenarios
1. Preventive testing: According to the requirements of the preventive testing regulations for power equipment, regularly (such as annually or after a certain number of operations) test the on load tap changers of transformers in operation.
2. New equipment acceptance: Performance verification of on load tap changers for newly installed or overhauled transformers.
3. Fault diagnosis: When there is abnormal noise, voltage regulation failure, gas relay action, or abnormal oil spectrum analysis in the on load tap changer, testing should be conducted to locate the fault point.
4. Verification after maintenance: After the maintenance or replacement of components of the on load tap changer suspension core, test whether its performance has been restored to qualified.
5. State assessment and life prediction: By tracking the trend changes of test data over a long period of time (such as slow increase in transition resistance and gradual extension of switching time), evaluate the degree of degradation of on load tap changers and predict their remaining life.
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