AC hipot tester YDJ

DCfor insulating oilhigh-voltage

Product introduction
The YDJ Digital Display 10 kVA oil-immersed AC/DC Hipot Tester is a high-capacity dielectric withstand test system for power transformers, long cables and other high-voltage equipment. Rated at 10 kVA with an oil‑immersed high-voltage transformer and digital monitoring, it performs AC and DC withstand voltage tests with automated control and data recording for laboratory, manufacturer QC and utility commissioning applications.

Product characteristics

• Oil-immersed insulation and oil-circulation cooling for improved dielectric strength and thermal dissipation.
• Digital display and automated control for precise voltage/current setting, monitoring and test logging.
• Corona ring and controlled insulation geometry to minimise partial discharge.
• Multiple capacity and voltage variants available to match field and laboratory requirements.

Advantages

• Stable high-voltage output suitable for medium and high-voltage equipment testing.
• Effective heat dissipation for long-duration tests via oil circulation.
• Scalable configuration: single-unit use or series/parallel connection for higher voltage or capacity.
• Sealed tank and explosion-proof design options reduce maintenance and operational risks.

Main application scenarios

• Power system testing: AC withstand voltage tests for circuit breakers, isolating switches and current transformers.
• Cable testing: step-up pre-tests for high-voltage power cables prior to DC withstand or series-resonance tests.
• Insulation material testing: dielectric breakdown testing of insulating boards, coatings, silicone rubber in laboratories and production QC.

Frequently asked questions

• Can units be cascaded to reach higher voltages? — Yes. Multiple oil-immersed test transformers can be cascaded to achieve ultra-high outputs for GIS, long cables and large transformers.
• What insulating oil is used? — Standard high-grade transformer insulating oil; alternative eco-friendly oils available on request.
• How often should the insulating oil be replaced? — Periodic inspection and dielectric testing of the oil are recommended; replacement frequency depends on operating conditions.

Technical parameters
Model | Capacity (kVA) | High Voltage (kV) | High-tension current (mA) | Input voltage (V) | Input current (A) | Ratio | Temp rise ℃ (30 minutes)
YDJ-3/50 | 3 | 50 | 60 | 200 | 15 | 500 | 10
YDJ-5/50 | 5 | 50 | 100 | 200 | 25 | 500 | 10
YDJ-10/50 | 10 | 50 | 200 | 200 | 50 | 500 | 10
YDJ-20/50 | 20 | 50 | 400 | 200 | 50 | 500 | 10
YDJ-30/50 | 30 | 50 | 600 | 200 | 50 | 500 | 10
YDJ-50/50 | 50 | 50 | 1000 | 200 | 125 | 500 | 10
YDJ-5/100 | 5 | 100 | 50 | 200 | 25 | 1000 | 10
YDJ-10/100 | 10 | 100 | 100 | 200 | 25 | 1000 | 10
YDJ-10/25 | 10 | 25 | 400 | 200 | 25 | 1000 | 10
YDJ-20/100 | 20 | 100 | 200 | 200 | 50 | 1000 | 10
YDJ-30/100 | 30 | 100 | 300 | 200 | 75 | 1000 | 10
YDJ-50/100 | 50 | 100 | 500 | 200 | 125 | 1000 | 10
YDJ-15/150 | 15 | 150 | 100 | 200 | 37.5 | 1000 | 10
YDJ-20/150 | 20 | 150 | 133 | 200 | 50 | 1000 | 10
YDJ-30/150 | 30 | 150 | 200 | 200 | 75 | 1000 | 10
YDJ-50/150 | 50 | 150 | 333 | 200 | 125 | 1000 | 10
YDJ-100/150 | 100 | 150 | 667 | 200 | 250 | 1000 | 10
YDJ-50/200 | 50 | 200 | 250 | 200 | 125 | 1000 | 10
YDJ-100/200 | 100 | 200 | 500 | 200 | 250 | 1000 | 10
YDJ-150/200 | 150 | 200 | 750 | 200 | 375 | 1000 | 10
YDJ-200/200 | 200 | 200 | 1000 | 200 | 500 | 1000 | 10
YDJ-300/200 | 300 | 200 | 1500 | 200 | 750 | 1000 | 10
YDJ-50/300 | 50 | 300 | 170 | 200 | 125 | 1000 | 10
YDJ-100/300 | 100 | 300 | 333 | 200 | 250 | 1000 | 10
YDJ-150/300 | 150 | 300 | 500 | 200 | 375 | 1000 | 10
YDJ-200/300 | 200 | 300 | 667 | 200 | 500 | 1000 | 10
YDJ-300/300 | 300 | 300 | 3000 | 200 | 750 | 1000 | 10

Characteristics / specifications

• Series: YDJ series, available from 3 kVA to 300 kVA and up to 300 kV output depending on model.
• Test modes: AC and DC withstand voltage with digital monitoring and automated data recording.
• Cooling/insulation: oil‑immersed transformer with oil circulation for heat dissipation and increased dielectric strength.
• Applications: high-voltage laboratories, manufacturer quality control, utility commissioning, cable and material testing.