Automatic Transformer Oil Dielectric Breakdown Voltage Tester for Insulating Fluid Dielectric Strength Analysis
This automatic transformer oil breakdown voltage tester evaluates the dielectric strength of insulating oils used in power transformers, circuit breakers, and mutual inductors. Utilizing high-speed microcontrollers and precision motor-driven boost mechanisms, the system executes automated breakdown tests adhering to international standards such as IEC 60156 and ASTM D877. The unit features integrated oil cup agitation, standing time countdowns, and real-time arc current protection to prevent electrode pitting and ensure repeatable measurement data for utility maintenance labs.
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80kV Oil BDV TesterJHBDV80 is a cost-effective transformer insulation oil tester with AC 0~80KV output voltage and a 2kV/s±10% voltage rise rate. It meets IEC156/IS6792/BS5874 standards, supports up to 9 tests, and has -
![100kV Oil BDV Tester]()
100kV Oil BDV TesterJHBDV100 is a high-voltage professional transformer insulation oil tester, featuring AC 0~100KV wide-range output and a 2kV/s±10% voltage rise rate. Compliant with IEC156/IS6792/BS5874 standards, it
We operate dedicated production facilities for high-voltage liquid testing apparatus, incorporating CNC machining centers for oil cup fabrication, high-voltage transformer winding lines, automated optical inspection (AOI) circuit assembly benches, and custom oil-bath calibration rigs. Every instrument undergoes a 72-hour continuous burn-in cycle and high-voltage dielectric stress testing prior to packaging. Direct manufacturing infrastructure ensures strict dimensional tolerances on electrode gaps, precise boost rate control, and reliable batch consistency for global distributors.
Product Types
Single-Cup Automated Oil Tester (JH-80 Series)
Generates output voltages up to 80kV; designed for standard routine testing in mobile field vehicles and mid-sized substation laboratories.
Multi-Cup High-Capacity Oil Tester (JH-100 Series)
Equipped with 3 automated testing cups and multi-sample cycling capability up to 100kV, built for high-throughput utility testing centers and oil regeneration plants.
Portable Field Diagnostic Model
Integrated into a ruggedized aluminum transport case with shock-mounted internal high-voltage modules, optimized for rugged outdoor substation environments.
Technical Specifications
| Parameter | Specification Details |
| Output Voltage Range | 0kV to 80kV / 0kV to 100kV (Model dependent; AC sinusoidal) |
| Voltage Boost Rate | 0.5 kV/s to 5.0 kV/s (Adjustable; standard presets: 2.0 kV/s, 3.0 kV/s) |
| Measurement Accuracy | Plus/minus 1% of full scale |
| Electrode Gap | 2.5mm (IEC 60156) or 1.0 inch / 0.08 inch (ASTM D877 / ASTM D1816 configurable) |
| Stirring & Standing Interval | Programmable magnetic stirring (0 to 99s) and standing pause (0 to 999s) |
| Test Sequence Capacity | 1 to 9 consecutive runs per sample with automatic mean value calculation |
| Safety Interlock | Microswitch-protected test chamber lid; automatic high-voltage grounding discharge within 10ms of breakdown |
| Display & Interface | 7-inch industrial touch screen with built-in thermal printer and USB data export |
| Power Supply | AC 220V plus/minus 10%, 50Hz / 60Hz (Single phase) |
| Operating Environment | Temperature: 0°C to 40°C; Relative Humidity: Below 85% RH (non-condensing) |
Key Features
Zero-Crossing Switching Control: Employs solid-state zero-crossing trigger circuits to eliminate DC transients during high-voltage initiation, protecting the transformer core from residual magnetization.
Rapid Arc Interruption: Halts high-voltage output within 10 milliseconds of dielectric breakdown, minimizing carbonization on electrode surfaces and extending test electrode lifespan.
Standard Test Protocol Library: Pre-programmed with international testing routines including IEC 60156, ASTM D877, ASTM D1816, BS 148, and custom user-defined cycles.
Automated Data Processing: Internal firmware automatically discards outlier values, calculates standard deviation, and computes average breakdown voltage across test sequences.
Thermal Documentation: Built-in micro printer generates immediate hardcopy records of test timestamps, peak breakdown voltages, temperature metrics, and average statistics.
Test Applications
Substation Acceptance Testing: Verifies dielectric integrity of new insulating oil shipments before filling high-voltage power transformers and shunt reactors.
Scheduled Preventive Maintenance: Monitors moisture absorption, particle contamination, and chemical aging in operational transformer oil during periodic overhauls.
Oil Purification Plant Quality Control: Evaluates oil samples before and after vacuum filtration and dehydration processes to confirm target dielectric breakdown thresholds.
Railway Traction Transformer Diagnostics: Tests insulating oil parameters in locomotive onboard transformers subjected to severe mechanical vibration and thermal cycling.
How to Choose the Right Tester
Selecting the appropriate transformer oil tester depends on operational testing volume and governing regional standards:
For Standard Utility Field Maintenance
Choose an 80kV single-cup model supporting IEC 60156 and ASTM D877 protocols for routine mobile substation testing.
For High-Throughput Laboratories & Refineries
Select a multi-cup 100kV testing system to minimize sample handling time and streamline batch analysis for commercial oil processing facilities.
For Research & Special Formulations
Utilize models featuring fully adjustable voltage rise rates, customizable stirring durations, and extended data logging options.
Electrode Machining & Polishing: Test electrodes are machined from high-purity brass or stainless steel, followed by precision diamond lapping to achieve mirror-finish surface roughness below Ra 0.4 micrometers.
Dielectric Tank Assembly: High-voltage transformers are vacuum-impregnated with specialized epoxy resin inside sealed chambers to eliminate internal air voids and partial discharge risks.
Automated Voltage Linearity Verification: Every finished testing unit undergoes multi-point calibration against high-voltage divider standards to guarantee output voltage linearity within 1 percent.
Environmental Stress Testing: Completed instruments undergo vibration table screening and 48-hour thermal cycling tests to verify mechanical stability during international transit.
Customization / OEM
Software Localization
Multilingual operating system interfaces (English, Spanish, French, Russian, etc.) and customized company logos on boot screens.
Hardware Modifications
Customized oil cup volume dimensions, specific electrode geometry configurations, and dedicated power input receptacles for regional electrical grids.
Private Labeling & ODM
Comprehensive manufacturing partnerships for analytical instrument brands, backed by strict non-disclosure agreements and configuration change control.
Documentation & Certifications
Factory Calibration Certificates
Each instrument ships with an individual metrological test report showing voltage step linearity and breakdown accuracy across certified test points.
Compliance Documentation
CE certification confirming adherence to European Low Voltage and Electromagnetic Compatibility directives.
Technical Manuals
Comprehensive English documentation including wiring diagrams, oil cup cleaning guidelines, calibration instructions, and spare parts lists.
Certifications
FAQ
Q: Which international standards are pre-programmed into the instrument?
A: The system includes standard test protocols such as IEC 60156, ASTM D877, ASTM D1816, BS 148, AS 1767, and custom user-defined sequences.
Q: How is electrode gap distance adjusted and verified?
A: The oil cup is supplied with a dedicated gauge block matching the target standard, such as 2.5mm for IEC 60156. Technicians use the precision adjustment screw on the electrode shaft to set the gap before locking it in place.
Q: How does the unit prevent carbon pitting on the electrodes during breakdown?
A: The high-voltage circuit cuts off power within 10 milliseconds of the initial spark, limiting arc duration and preventing excessive carbon accumulation or electrode surface erosion.
Q: Can the test data be exported to a PC or management system?
A: Yes. Test results stored in internal memory can be transferred via the USB interface to a computer or flash drive for database archiving and report generation.
Q: What maintenance is required for the oil testing cups?
A: Oil cups should be cleaned with petroleum ether or an approved solvent after testing heavily contaminated samples, followed by thorough drying to remove residue before subsequent runs.
Q: What is the typical lifespan of the testing electrodes?
A: With regular cleaning and standard operation, the precision electrodes endure thousands of test cycles before requiring minor resurfacing or replacement.
Q: Are spare oil cups and gaskets included with the equipment?
A: Yes. Standard factory shipments include standard glass or polymethylpentene oil cups, magnetic stirring beads, gap gauges, spare fuses, and replacement sealing O-rings.
Q: What warranty terms apply to wholesale and OEM orders?
A: We provide a 12-month standard manufacturing defect warranty covering hardware components and calibration stability, supported by remote engineering assistance and spare parts supply.
As one of the most experienced transformer oil tester manufacturers in China, we offer a wide range of products with superior quality. Please feel free to wholesale bulk durable transformer oil tester from our factory. For price consultation, contact us.
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