Introduction of SF6 Gas Testing Transformer

The SF6 Gas Testing Transformer is a new-generation high voltage test equipment developed to replace traditional oil-immersed test transformers. By using SF6 (Sulfur Hexafluoride) gas as the insulation medium, this transformer provides excellent insulation performance, compact structure, clean operation, and reliable high-voltage testing capability.

Compared with conventional oil-filled test transformers, SF6 gas insulated transformers significantly improve insulation strength while reducing equipment size and maintenance requirements. They are widely used for high voltage withstand tests, partial discharge tests, preventive inspections, and performance verification of power equipment.

Yangzhou SUTE Technology Co., Ltd. specializes in the research, development, and manufacturing of high voltage testing equipment, including SF6 gas testing transformers, SF6 reactors, impulse generators, and complete high voltage test systems. The company has cooperated with universities such as Shanghai Jiao Tong University and Xi'an Jiaotong University for technical development and continuously improves product performance through innovation.

Excellent Performance Characteristics of SF6 Gas

SF6 gas is widely recognized as an ideal insulating medium in high-voltage electrical equipment due to its outstanding electrical and physical properties.

1. High Dielectric Strength

SF6 gas has a much higher dielectric strength than air, which enables the transformer to withstand extremely high voltage levels with a smaller insulation distance.

This characteristic allows SF6 Gas Testing Transformers to achieve:

• Higher voltage output capability
• More compact equipment structure
• Improved insulation reliability
• Reduced risk of electrical breakdown

SUTE SF6 armoured test transformers can reach voltage levels up to 1250 kV, providing a reliable solution for ultra-high voltage testing applications.

2. Excellent Arc Extinguishing Performance

SF6 gas has excellent arc extinguishing capability because of its strong electron absorption characteristics. It can effectively suppress discharge development and improve electrical safety during high voltage testing.

This makes SF6 insulated test transformers especially suitable for:

• GIS and GIL testing
• High voltage switchgear testing
• Transformer insulation tests
• Cable and electrical component testing

3. Clean and Environmentally Friendly Operation

Unlike traditional oil-filled test transformers, SF6 gas insulation eliminates oil leakage problems and avoids oil contamination.

Main advantages include:

• No oil pollution
• No oil replacement requirement
• Cleaner working environment
• Reduced maintenance workload

The SF6 armoured transformer developed by SUTE adopts gas insulation instead of traditional oil insulation, achieving a cleaner and safer testing environment.

4. Low Partial Discharge Performance

Partial discharge is one of the most important indicators for high-voltage test equipment.

Thanks to optimized insulation design, advanced electrode structures, and uniform electric field distribution, SUTE SF6 Gas Testing Transformers achieve extremely low partial discharge levels.

Typical performance:

• Partial discharge ≤3 pC at 80% rated voltage
• Under excellent test conditions, partial discharge can be controlled below 1 pC

Technical Advantages of SUTE SF6 Gas Testing Transformer

Compact Structure and Lightweight Design

Compared with conventional oil-immersed test transformers, SF6 gas insulated transformers have a more compact structure and smaller footprint.

Key advantages:

• Reduced installation space
• Easier transportation and movement
• Flexible laboratory arrangement
• Suitable for indoor high-voltage laboratories

SUTE's third-generation SF6 gas transformer adopts advanced design concepts, reducing equipment volume by more than 20% compared with similar international products.

Advanced Electric Field Optimization Technology

SUTE adopts special design technologies including:

Segmented High Voltage Winding Technology

The high voltage winding adopts segmented winding technology, which improves:

• Voltage distribution uniformity
• Electric field control
• Impulse withstand capability

Multi-Curve Shielding Electrode Structure

The specially designed curved electrode structure improves electric field distribution and reduces local electric stress.

Typical Parameters of SF6 Gas Testing Transformer

The above parameters are based on SUTE standard SF6 armoured transformer series. Customized designs can be manufactured according to customer requirements.

Applications of SF6 Gas Testing Transformer

SF6 Gas Testing Transformers are widely applied in high voltage laboratories, electrical equipment manufacturers, research institutes, and power system testing centers.

Typical applications include:

1. High Voltage Withstand Test

Used for testing:

• Power transformers
• GIS equipment
• High voltage switches
• Insulators
• Bushings
• Cable accessories

2. Partial Discharge Test

The low partial discharge characteristics make SF6 transformers ideal for precision insulation testing and quality inspection.

3. Preventive Maintenance Testing

Used by:

• Power utilities
• Electrical equipment manufacturers
• Research laboratories

for evaluating insulation performance and ensuring operational reliability.

Why Choose SUTE SF6 Gas Testing Transformer?

Yangzhou SUTE Technology provides complete high voltage testing solutions with professional engineering experience.

Main Advantages:

✔ Voltage capability up to 1250kV
✔ Low partial discharge design
✔ Compact and lightweight structure
✔ High insulation reliability
✔ Clean operation without oil pollution
✔ Customized solutions available
✔ Complete high voltage testing system integration capability

SUTE products have been supplied to many well-known electrical equipment manufacturers and testing institutions, including domestic and international customers. The company provides SF6 transformers, test systems, control systems, and related high voltage laboratory solutions.

Conclusion

The SF6 Gas Testing Transformer represents an advanced solution for modern high voltage testing requirements. With superior insulation performance, excellent dielectric strength, low partial discharge characteristics, and compact design, it provides a safer, cleaner, and more efficient alternative to traditional oil-filled test transformers.

For customers requiring reliable high voltage test equipment, SUTE SF6 Gas Testing Transformer offers customized solutions for laboratories, electrical manufacturers, and power system testing applications worldwide.