UHV-4000 Transformer On-Load Tap-Changer Tester
Product Introduction:
The UHV-4000 Transformer On-Load Tap-Changer Tester is designed to measure key parameters of on-load tap-changers, including transition waveforms, transition time, instantaneous transition resistance values, and three-phase synchronization.
Featuring a vertical chassis structure, the tester is lightweight and highly portable. transformer on-load tap-changer tester manufactures is equipped with a 5.7-inch LCD screen with backlight and wide-temperature capability, ensuring clear visibility even in direct sunlight. Internally, it integrates an embedded PC-104 industrial control computer, offering high-speed operation and ample storage capacity for efficient testing and data management.
Product functions:
On-load tap-changer transition waveform testing: Real-time detection and recording of the transition waveform during tap-changer switching.
Transition time measurement: Precisely measures the transition time of the on-load tap-changer switching process.
Transition resistance measurement: Detects the instantaneous transition resistance during switching, determining the condition of contacts and the switching circuit.
Three-phase synchronization testing: Tests the synchronization performance of three-phase tap-changer operation, promptly identifying phase-to-phase non-synchronization issues.
Multi-channel high-speed sampling: Adopts 6-channel high-speed data sampling, enabling synchronous acquisition of multiple signals during testing.
Graphical display of test results: Test data can be displayed intuitively through waveform graphs and data, facilitating analysis and judgment.
Technical parameters:
| output current | ≥1A，3 channel |
| data sampling | sampling channel：6 channel |
| sampling frequency：10kHz/s | |
| Faixa de medição | transition resistance：0.5Ω～20Ω |
| transition time：≤250ms | |
| resolução | resistance：0.01Ω |
| time：0.1ms | |
| measurement precision | transition resistance：±(5%+3 digital) |
| transition time：±(0.1%+1 digital) | |
| Modelo de armazenamento | U disk storage、machine storage 1G |
| Dimensões | 350 mm × 230 mm × 200 mm |
| host weight | 5kg |
Conditions of Use:
| Temperatura ambiente | -10℃～50℃ |
| environment humidity | ≤85% UR |
| Fonte de alimentação funcionando | AC220V±10% |
| frequência da fonte de alimentação | 50±1 Hz |
Product Features:
1、Features a vertical chassis design, offering a lightweight structure for easy portability.
2、Equipped with an embedded PC-104 industrial control computer, delivering fast processing speed and ample storage capacity.
3、Includes a built-in precision constant current source and a comprehensive, reliable protection circuit.
4、Supports 6-channel high-speed data sampling.
5、Uses a 5.7-inch LCD screen with backlight and wide-temperature adaptability, ensuring clear visibility even in direct sunlight.
6、Displays results in both graphical and textual formats.
7、Integrated T9 input method for convenient entry of letters, Chinese characters, and symbols.
8、Offers 1 GB of built-in storage, capable of storing tens of thousands of sets of test data.
9、Supports USB flash drive storage function, enabling extended data capacity.
10、Includes USB data synchronization for convenient data transfer and exchange.
11、Employs a tree-structured storage system organized by station name, number, and tap position, facilitating easy data retrieval.
12、Built-in panel thermal printer for immediate data output.
Application Scenarios
Substation on-site testing: Used for routine testing and condition assessment of on-load tap-changers on main transformers in substations.
Transformer handover testing: Before commissioning of newly installed or retrofitted transformers, perform performance testing on the on-load tap-changer.
Transformer maintenance testing: After transformer major overhaul or tap-changer maintenance, used to verify switch operation and electrical performance.
Preventive testing: Periodic testing of transition resistance, transition time, and three-phase synchronization, assisting in identifying potential faults.
Fault diagnosis: By analyzing waveforms, transition time, and transition resistance during switching, assists in determining issues such as poor contact and abnormal switching.
Power equipment manufacturer testing: Used for factory testing and quality inspection during the production of transformers and on-load tap-changers.
Power maintenance organization testing: Suitable for power testing institutions and maintenance companies conducting specialized testing of transformer on-load tap-changers.
FAQs:
Q1: What is this device mainly used for testing?
A: It is mainly used to test the switching performance of transformer on-load tap-changers (OLTC), including parameters such as transition time, transition resistance, switching waveform, and three-phase synchronization.
Q2: What problems can this tester detect?
A: It can assist in identifying issues such as abnormal OLTC switching, abnormal transition resistance, poor contact of contacts, three-phase non-synchronization, and abnormal switching time.
Q3: What transformers is this device suitable for?
A: It is mainly suitable for testing and maintenance of power transformers equipped with on-load tap-changers, substation main transformers, and similar equipment.
