Resistance tester UHV-10A

continuitylow-resistanceDC

Product overview
The UHV-10A is a DC winding resistance tester designed for measuring DC resistance of transformer windings and high-power inductive devices. It reduces test time and operator workload by using advanced power and measurement techniques while providing accurate, repeatable readings in a compact instrument.

Key features

• Compact and lightweight design for site and laboratory use.
• Menu operation available in Chinese and English for intuitive control.
• Fast measurement cycles with stable and repeatable results.
• Automatic discharge and discharge-indication functions to reduce misuse and improve safety.
• Data storage up to 255 records; maximum resolution 0.1 μΩ.

Technical parameters

• Model: UHV-10A
• Test currents: 1 mA, 10 mA, 1 A, 5 A, 10 A
• Measurement ranges: 1 mA: 10 Ω–20 kΩ; 10 mA: 1 Ω–2 kΩ; 1 A: 10 mΩ–20 Ω; 5 A: 1 mΩ–4 Ω; 10 A: 1 mΩ–2 Ω
• Measurement accuracy: ±(0.2% full-scale ± 2 digits)
• Data storage: 255 records
• Display: LCD, resistance shown as 4½ digits
• Maximum resolution: 0.1 μΩ
• Power supply: AC 220 V ±22 V, 50 Hz ±2 Hz (fuse 5 A)
• Maximum power consumption: 300 W (at 10 A test current)
• Operating environment: ambient temperature 0°–40° C; relative humidity ≤ 80%
• Dimensions: 400 × 200 × 280 mm
• Weight: 9 kg (without accessories)

Transport / Storage / Handling
Use appropriate packing cases and damping materials during transport to avoid damage. Do not stack equipment without wooden cases; when using apparatus packing cases, maximum stacking layer is two. Keep the faceplate upward during transport. Store indoors in a dry, dust-free, ventilated environment without corrosive gases; use moisture-proof materials under the unit.

After-sales service
One-year overall warranty with lifetime maintenance policy. Free maintenance is provided for quality defects within the warranty period. Preferential service options are available in cases of user-caused damage.

Precautions
① After measuring the inductive load, the test line cannot be directly removed to avoid endangering the safety of testing personnel and equipment due to inductive discharge. The output terminal of this machine is equipped with a discharge circuit. When the output is turned off, the inductor will release energy through the instrument. The test line can only be removed after the discharge indicator is completed.
② For no-load tap changers, it is not allowed to switch tap changers during the measurement process.
③ If the power suddenly shuts down during the measurement process, this machine will automatically start discharging. Please do not immediately remove the wiring, wait at least 30 seconds before removing the wiring.
④ When measuring, do not short-circuit other untested windings to ground, otherwise it will slow down the transformer magnetization process and prolong the data stability time.
⑤ Please check the power supply voltage before starting up: AC 220V ± 10% 50Hz.
⑥ Please confirm that the tested equipment has been powered off and disconnected from other live devices during the experiment.
⑦ The casing must be reliably grounded during the experiment.
⑧ During the experiment, unrelated items are not allowed to be stacked on or around the equipment panel.
⑨ When replacing the fuse and accessories, please use the same model as this instrument.
⑩ This instrument should be moisture-proof and oil proof.