Product Introduction
The UHV-4000 Transformer On-Load Tap-Changer Tester is designed to inspect the on-load tap changer, the only moving part connected to the transformer circuit. It measures transition waveform, transition time, instantaneous transition resistance values, and three-phase synchronism. The tester is highly intelligent, user-friendly, compact, lightweight, and has strong anti-interference capabilities, making it ideal for power supply and transformer manufacturing industries.

Product Features
1. Lightweight vertical chassis structure.
2. Embedded PC-104 industrial control computer with fast speed and large storage.
3. Built-in precise constant current source with reliable protection circuit.
4. 6-channel high-speed synchronous data sampling.
5. 5.7-inch backlit wide temperature LCD for clear display.
6. Graphic and text display results.
7. T9 input method for various character inputs.
8. Host storage capacity of 1G for extensive data storage.
9. External USB disk storage and data synchronization.
10. Tree-shaped storage structure for convenient data query.
11. Built-in panel-type thermal printer.

Technical Parameters
- Output current: ≥1A, 3 channels
- Data sampling: 6 channels, 10kHz/s frequency
- Measuring range: Transition resistance 0.5Ω～20Ω, Transition time ≤250ms
- Resolution: Resistance 0.01Ω, Time 0.1ms
- Measurement precision: Resistance ±(5%+3 digital), Time ±(0.1%+1 digital)
- Storage: U disk and machine storage 1G
- Dimensions: 350mm×230mm×200mm
- Weight: 5kg

Conditions of Use
- Environment temperature: -10℃～50℃
- Humidity: ≤85%RH
- Working power supply: AC220V±10%, 50±1Hz frequency