Fully Digital Insulating Oil Dielectric Strength Tester

The MOEORW-WBV08 is a fully digital Insulating Oil Dielectric Strength Tester (also referred to as an Insulating Oil Breakdown Voltage Tester) designed and manufactured in strict accordance with GB/T507-1986, GB/T507-2002, DL/T846.7-2004 and related standards. Incorporating a high-capacity single-chip microcomputer control system and high-voltage side direct sampling technology, this instrument is specifically used to determine the breakdown voltage of liquid insulating materials such as transformer oil, switch oil, and capacitor oil. Whether for incoming material inspection by power equipment manufacturers or batch oil sample analysis by third-party testing laboratories, this oil withstand voltage tester delivers highly repeatable and reliable test data, enabling accurate assessment of insulating oil aging and contamination levels.

Front-End Sampling for True Data without Deviation
Unlike conventional instruments that transmit analog signals over long wiring to the front panel, this dielectric strength tester completes signal acquisition directly at the high-voltage side and feeds it directly into the A/D converter. This design ensures that the breakdown voltage value undergoes virtually no attenuation or interference before reaching the main control chip, guaranteeing that every measurement truly reflects the oil sample's withstand voltage level. Combined with millisecond-level transient capture capability, the instrument precisely records the peak voltage at the exact moment of breakdown, avoiding low readings caused by signal lag. Laboratory comparative verification shows that voltage measurement accuracy under this architecture is better than ±(2% of reading + 2 digits), with long-term stability significantly outperforming traditional designs.
 

Multi-Layer Safety Protection for Operator and Equipment Safety
As a high-voltage test instrument, safety is the foremost indicator for evaluating any insulating oil breakdown voltage tester. This unit incorporates a triple interlock protection mechanism: the high-voltage start is disabled when the oil cup cover is open (door switch protection); the system continuously monitors current anomalies during voltage boosting, immediately cutting off output if thresholds are exceeded (overcurrent protection); and an independent emergency stop button on the front panel allows manual forced termination of high-voltage output in unexpected situations. After each test, the automatic discharge circuit reduces residual charge on the oil cup and electrodes to below safe voltage levels within 0.1 seconds, preventing operators from electric shock when handling oil cups. This safety design has passed relevant electromagnetic compatibility tests and operates stably even in high-interference industrial environments.
 

Full Standard Compatibility & Programmable Free Combination
The instrument comes pre-programmed with four commonly used test standards: GB/T507-1986, GB/T507-2002, DL429.9-91 and IEC60156. Users simply select the desired standard from the menu with one key, and the system automatically applies the corresponding stirring time, resting time, and boost rate. For users with special requirements, this dielectric strength tester offers a fully customizable programming mode: rest time adjustable from 0 to 99 minutes, interval rest time adjustable from 0 to 99 minutes, stirring time adjustable from 0 to 255 seconds, cut-off voltage adjustable from 10 to 80kV (in 10kV increments), and number of test cycles adjustable from 1 to 10 times, meeting the flexible testing needs for non-standard oil samples or in-house quality control methods.
 

Precision Oil Cup & Long-Term Stability
The oil cup is the critical component determining the repeatability of test results. The oil cup supplied with this instrument is precision-manufactured from specialty optical glass and polymer composite materials, offering a wall smoothness superior to conventional metal or ordinary glass oil cups, which resists oil residue adhesion and facilitates easy cleaning. The electrode gap is precisely factory-calibrated to the standard 2.5mm, and it is recommended that users re-verify the gap according to the manual after one month of continuous use. During instrument downtime, simply filling the oil cup with sufficient dry, qualified new oil for immersion effectively protects the electrode surface from oxidation, extends service life, and reduces consumable replacement costs.
 

Wide Operating Range & Convenient HMI
The instrument operates with a wide power supply tolerance of AC 220V ±20% and frequency 50Hz ±5Hz, ensuring normal startup and stable boost rate (0.5kV/s～5.0kV/s in ten selectable steps, error ≤±0.2kV/s) even in remote substations or factory workshops with poor grid conditions. The large LCD screen displays real-time ambient temperature and humidity, current boost voltage, completed test cycles, and remaining rest time. Combined with function keys and cursor-based menu navigation, operators can quickly become proficient without consulting complex manuals. The built-in thermal printer outputs a paper report containing each breakdown voltage value, average value, and the test standard used with a single key press, facilitating record-keeping and archiving.

Power Equipment Manufacturing Plants (Transformers, Switchgears, Instrument Transformers)
During the factory withstand voltage testing phase, this oil withstand voltage tester is used for spot-checking the breakdown voltage of each batch of new oil or insulating oil before equipment filling, ensuring incoming oil quality meets standards and avoiding finished product test failures and rework losses caused by insufficient insulating oil withstand voltage.

Power Plants & Substation Operation & Maintenance Departments
Regularly sampling and testing insulating oil from in-service transformers, on-load tap changers, and high-voltage bushings. By tracking trends in breakdown voltage values, potential internal faults such as partial discharge, thermal aging, or moisture ingress can be identified, providing data support for equipment maintenance scheduling.

Electric Power Research Institutes & Third-Party Testing Laboratories
Facing a large volume of oil samples from various manufacturers and voltage classes, this insulating oil dielectric strength tester can quickly switch between multiple national and international standards, issuing credible test reports that meet the strict traceability and repeatability requirements of CMA/CNAS accredited laboratories.

Petrochemical & Lubricant Blending Plants
Performing quality control checks on insulating oil products before shipment, verifying batch-to-batch consistency in withstand voltage performance. It is also a key piece of equipment for demonstrating quality control capabilities during customer factory audits.

Railway Traction Substations & Mining Power Systems
In harsh field environments with wide temperature variations, high dust levels, and significant voltage fluctuations, the instrument's wide power supply tolerance and electromagnetic interference immunity ensure successful completion of testing tasks, making it a practical choice for mobile testing vehicles and on-site emergency repair toolkits.

Each instrument undergoes a full-range 80kV withstand voltage aging test before shipment, and comes with a unique serial number and factory calibration record for complete traceability.
The core transformer is designed with a 1.5kVA margin, ensuring low temperature rise and long service life under rated voltage operation, effectively reducing post-warranty repair rates.
Two-year comprehensive warranty on the entire unit (excluding man-made faults), with free repair or replacement of faulty components during the warranty period.
Standard accessories include a complete operation manual (including a quick troubleshooting guide), power cord, grounding cable, and one roll of spare thermal paper.
OEM/ODM customization supported: front panel LOGO, packaging box branding, and startup screen text can all be customized per customer requirements, meeting private-label and export needs.