80kV Insulating Oil Dielectric Strength Tester | VS-9501

Products Details

VS-9501 80kV Insulating Oil Dielectric Strength Tester is developed according to GB/T507-2002 and DL/T846.7-2016 standards for dielectric strength testing of insulating oils. Serving as a high-precision system within our specialized insulating oil dielectric strength tester category, the instrument utilizes advanced microprocessor control technology and digital signal processing to deliver highly accurate and repeatable breakdown voltage measurements.

The system adopts a fully automatic testing process including oil sample resting, voltage ramping, breakdown detection, stirring, interval timing, and result analysis. Operators simply select the desired test standard and start the test procedure. The instrument automatically completes the entire testing sequence and generates test results.

A 7-inch color touchscreen interface provides intuitive operation and supports both Chinese and English languages. Multiple built-in testing standards including GB/T507-1986, GB/T507-2002, DL429.9, IEC156, and user-defined programs allow flexible testing according to different national and international requirements.

The instrument features millisecond-level breakdown voltage capture technology and direct high-voltage sampling architecture, ensuring high measurement accuracy and rapid transient response. Triple protection systems including cover interlock protection, overcurrent protection, and overvoltage protection provide maximum operator safety.

An optional infrared oil temperature measurement function enables real-time monitoring of sample temperature. Built-in temperature and humidity monitoring, data storage, thermal printer, RS232 communication interface, and intelligent oil quality analysis functions further enhance testing efficiency and traceability.

Specifications

Technical Parameters
Parameter	Specification
Model	VS-9501
Output Voltage Range	0–80kV
Transformer Capacity	1.5kVA
Voltage Measurement Accuracy	±(2% Reading + 2 Digits)
Power Distortion Rate	<1%
Electrode Gap	Standard 2.5mm
Test Times	1–9 Times (Default 6 Times)
Resting Time	0–9999 Seconds
Interval Time	0–999 Seconds
Stirring Time	0–255 Seconds
Voltage Rise Rate	0.5–5.0kV/s
Voltage Rise Accuracy	±0.2kV/s
Display	7-inch Color Touch Screen
Communication Interface	RS232
Printer	Built-in Thermal Printer

 

Environmental Conditions		Physical Specifications
Parameter	Specification	Parameter	Specification
Operating Temperature	0°C to +40°C	Dimensions	430 × 390 × 390 mm
Relative Humidity	≤85% RH	Oil Cup Type	Single Cup
Power Supply	AC 220V ±10%	Electrode Standard	2.5mm Gap
Frequency	50Hz ±10%	Oil Temperature Measurement	Infrared Sensor (Optional)
Power Consumption	<200W

 

Standard Test Standards
Standard	Description
GB/T507-1986	Transformer Oil Breakdown Voltage Test
GB/T507-2002	Transformer Oil Breakdown Voltage Test
DL429.9	Power Industry Standard
IEC156	International Standard
User Defined	Custom Test Procedures

Standard Accessories

1. Control Unit

2. High Voltage Multiplier Tower

3. High Frequency Output Cable

4. Power Supply Cable

5. Discharge Rod

6. Grounding Cable

7. Shielded Microammeter Test Cable

8. Built-in Current Limiting Resistor

9. User Manual

10. Calibration Certificate

11. Factory Test Report

How the System Works

The VS-9501 automatically applies a controlled AC voltage across the insulating oil sample using a standardized electrode arrangement. The voltage increases at a selected rate until dielectric breakdown occurs. The instrument instantly captures the breakdown voltage value, automatically discharges residual voltage, and proceeds to the next test cycle according to the selected standard.

After completing all programmed test cycles, the instrument calculates average values, analyzes test consistency, and provides evaluation results to assist technicians in determining oil quality and insulation performance.

Features

• Fully automatic oil breakdown voltage testing
• Maximum output voltage up to 80kV
• 7-inch color touchscreen display
• Chinese and English language support
• Infrared oil temperature measurement function
• Built-in temperature and humidity monitoring
• Supports GB/T507, DL429.9, IEC156 standards
• Customizable testing procedures
• Millisecond-level breakdown voltage capture
• Direct high-voltage sampling technology
• Automatic voltage ramping and breakdown detection
• Automatic stirring and interval timing
• Triple safety interlock protection
• Automatic discharge within 0.1 seconds
• Built-in thermal printer
• RS232 data communication interface
• Historical data storage and retrieval
• Intelligent oil quality analysis function
• Strong anti-interference performance
• High measurement accuracy and repeatability

Applications & Use Cases

Application Scenarios

• Transformer Oil Testing: Used for routine dielectric strength testing of transformer insulating oil.

• Substation Maintenance: Supports preventive maintenance and oil condition monitoring programs.

• Transformer Manufacturing: Provides factory acceptance testing and quality control.

• Power Utilities: Suitable for utility laboratories and field maintenance teams.

• Electrical Equipment Manufacturers: Used for insulating oil quality verification and certification.

• Research Laboratories: Supports oil analysis and insulation research applications.

Functional Applications

• Transformer Oil Breakdown Voltage Testing

• Insulating Oil Quality Assessment

• Substation Maintenance Programs

• Transformer Manufacturing Quality Control

• Electrical Equipment Acceptance Testing

• Utility Laboratory Testing

• Oil Regeneration Evaluation

• Preventive Maintenance Inspection

• Power Plant Oil Testing

• High Voltage Equipment Oil Analysis

Weshine Advantages

Weshine Electric is a professional manufacturer of transformer testing equipment and high-voltage diagnostic instruments. As part of our comprehensive oil test equipment range, our VS-9501 80kV Insulating Oil Dielectric Strength Tester combines intelligent automation, precision voltage control, advanced safety protection, and comprehensive data management capabilities. Designed for utilities, transformer manufacturers, laboratories, and industrial users, Weshine products deliver reliable and accurate insulating oil analysis solutions that help ensure the safe and efficient operation of electrical power systems.