Full Automatic Dielectric Oil Lab Testing Equipment Breakdown Voltage Analyzer Transformer Oil BDV Tester

The VS-9501B is a fully automatic breakdown voltage (BDV) tester designed to measure the dielectric strength of transformer oils and other insulating fluids. It controls voltage rise precisely and provides results that comply with international testing standards for transformer maintenance, quality control and R&D.

The VS-9501B supports and is pre-programmed for multiple international standards including IEC 60156, ASTM D877, ASTM D1816, BS EN 60156, CEI EN 60156, VDE 0370-5, AS1767.2.1, JIS C2101, GB/T507, DL/T 846.7 and DL/T 429.9. It is also certified to CE, EMC, LVD and ISO requirements.

The tester offers a wide test range up to either 0–80 kV or 0–100 kV depending on model/configuration, covering the voltage needs for most dielectric oil testing applications.

Voltage raising speed is adjustable. The product documentation lists a configurable range from about 0.5 to 5 kV/s, with common operational settings in the 2.0–3.5 kV/s range for standard BDV testing.

The standard electrode gap is 2.5 mm, which is the industry-accepted spacing for many BDV tests. Using the specified gap ensures test results are comparable to the referenced standards and between laboratories.

The VS-9501B supports multiple sample configurations including single-cup, triple-cup and six-cup arrangements, allowing batch testing for higher throughput or individual checks as needed.

The unit includes a 1.5 kVA booster to supply consistent high-voltage during tests, ensuring stable and repeatable breakdown measurements.

The VS-9501B is designed to be compact and portable. Depending on configuration, typical footprints fall roughly in the ranges 320–500 mm (W) x 280–360 mm (D) x 420–460 mm (H) and weights around 22–34.5 kg. Refer to the specific model datasheet for exact dimensions and weight.

The product documentation states a power distortion rate of <1% and uses a mains supply suitable for the booster and control electronics. Exact voltage and frequency requirements depend on regional model configuration—consult the user manual or datasheet for your unit's rated input (e.g., 110/220 VAC, frequency).

'Full automatic' means the tester can perform the BDV test sequence—including voltage ramping, detection of breakdown events, cut-off and recording—without manual intervention. It reduces operator variability and helps ensure tests conform to pre-programmed standard procedures.

The unit is designed and certified to international safety standards (CE, LVD, EMC). Typical protective features include controlled high-voltage cut-off on breakdown detection, grounding provisions, and interlocks or shielding to protect the operator. Always follow the supplied safety instructions and local electrical safety practices.

The tester provides automatic result capture per test cycle in accordance with the selected standard. For details about built-in displays, printing or PC communication (data export, logging or software packages), check the specific model options or contact the manufacturer for available interfaces and software packages.

Regular calibration and preventive maintenance are recommended to ensure accurate BDV results. Typical practice is annual calibration by a qualified service provider or more frequently if used heavily or in critical applications. Routine maintenance includes cleaning electrodes, checking insulation and connections, and verifying booster performance—refer to the user manual for a maintenance schedule.

Sample volume depends on the cup configuration (single, triple, six-cup). Oils should be prepared and tested following the chosen standard (e.g., filtration, degassing, temperature control). Consult the applicable standard (IEC/ASTM) and the instrument manual for precise sample volumes and preparation steps.

The VS-9501B is suitable for transformer oil testing in power plants, utilities, manufacturing quality control, routine maintenance, and research laboratories studying dielectric fluids. It is intended for indoor laboratory or workshop use in environments that meet the specified ambient and safety conditions in the manual.