Oil Immersed AC Withstand Voltage Test Transformer | Power Frequency High Voltage Tester

The Oil Immersed AC Withstand Voltage Test Transformer is a professional power frequency high-voltage testing system designed for AC insulation withstand voltage testing of electrical equipment and insulating materials. It is widely used to verify insulation strength, identify insulation defects, and evaluate dielectric performance before equipment is put into service.

Built with high-quality oil-immersed insulation and precision high-voltage windings, the system provides stable output voltage, reliable insulation performance, and excellent overload capability. It is suitable for routine maintenance, factory testing, commissioning, and laboratory applications.

The test transformer can be customized with different voltage ratings and capacities to meet various testing requirements in power utilities, electrical manufacturers, substations, and industrial facilities.

The AC withstand voltage test transformer is suitable for testing a wide range of electrical equipment, including:

• Power transformers
• Distribution transformers
• High-voltage switchgear
• Circuit breakers
• GIS equipment
• Power cables
• Busbars
• Insulators
• Instrument transformers (CT/PT)
• Electrical motors and generators
• Electrical components
• Insulating materials
• Power equipment manufacturing plants
• Substations
• High-voltage laboratories
• Electrical maintenance companies

• Oil immersed insulation structure with excellent dielectric strength
• Stable AC power frequency high-voltage output
• Suitable for long-duration withstand voltage testing
• High overload capability and reliable insulation performance
• Precision voltage and current measurement
• Zero-position protection for safer operation
• Overcurrent protection with automatic shutdown
• Audible and visual alarm system
• Flexible timer from 1 second to 99 hours
• Compact and durable structure for field and laboratory use
• Removable core design available for models above 6kVA
• Custom voltage and capacity available
• Easy maintenance with long service life

1. Connect the test transformer and control console correctly.
2. Connect the grounding cable before energizing the equipment.
3. Connect the test object securely.
4. Set the required output voltage and protection parameters.
5. Increase the voltage gradually to the specified test value.
6. Maintain the withstand voltage for the required test duration.
7. Monitor voltage, current, and equipment status throughout the test.
8. Reduce the voltage to zero after testing.
9. Disconnect the equipment only after complete discharge.
10. Record and analyze the test results.

Compared with conventional high-voltage testing equipment, this oil immersed AC withstand voltage test transformer offers excellent voltage stability, strong insulation capability, and high testing reliability.

Its modular design supports flexible customization of voltage ratings, output capacity, and structural configuration, making it suitable for laboratory testing, factory inspection, commissioning, and on-site maintenance.

The oil-immersed insulation structure provides superior cooling performance and long service life while ensuring stable operation under continuous high-voltage testing conditions.

It is used to verify the insulation strength of electrical equipment by applying power frequency AC high voltage, helping detect insulation defects before equipment is commissioned.

It is suitable for transformers, switchgear, circuit breakers, power cables, busbars, insulators, instrument transformers, motors, generators, GIS equipment, electrical components, and insulating materials.

Oil immersed transformers provide better insulation performance, higher voltage capability, stronger overload capacity, and improved cooling for continuous testing.

Yes. Output voltage, rated capacity, structure, input voltage, and accessories can all be customized according to project requirements.

Yes. The equipment is suitable for both laboratory and field applications when operated under appropriate environmental conditions.

To ensure long-term reliability and customer satisfaction, HKVTEST provides comprehensive after-sales support:

✓ 2-Year Warranty for Complete Machine
✓ Lifetime Technical Support and Engineering Consultation
✓ Factory Calibration Before Shipment
✓ OEM & ODM Customization Service Available
✓ Technical Training and Operation Guidance
✓ Spare Parts Supply Throughout Product Lifecycle
✓ Fast After-sales Response with Remote Technical Assistance
✓ Multi-language Manuals and Product Documentation Available

Looking for professional testing equipment for your power system project?

With 16+ years of manufacturing experience, HKVTEST provides reliable electrical testing instruments and customized solutions for power utilities, substations, contractors, and testing service companies worldwide.

Whether you need product specifications, technical consultation, quotation, delivery information, or customized solutions, our engineering team is ready to support your project.

✓ Product Selection & Technical Consultation
✓ Customized Testing Solutions
✓ Project Quotation & Delivery Support
✓ Installation Guidance & Operation Training
✓ After-sales Technical Support

WhatsApp: +86 180 7153 1810

Email: fionahuang60@gmail.com

Website: www.hkvtest.com

We will reply to your inquiry within 24 hours.

Get professional support from a manufacturer with 16+ years of experience in electrical testing equipment.