G7 sheets: Diverse uses of high-performance insulation materials

G7 sheet is mainly made of treated alkali-free glass fiber cloth impregnated with specific silicone resin, and then baked, dried and hot-pressed. This manufacturing process ensures that the material has excellent physical, electrical and mechanical properties.

Features of G7 sheets

‌High temperature resistance‌: G7 sheet has excellent high temperature resistance. Heat resistance grade is H grade. And long-term working temperature is not less than 180℃‌. This allows it to maintain stable electrical and mechanical properties in high temperature environments.

‌Mechanical properties‌: G7 sheet has high mechanical strength and hardness, vertical layer bending strength ≥119.6MPa, parallel layer impact strength ≥24.9KJ/m²‌. These characteristics make G7 sheet perform well when subjected to external forces and suitable for various mechanical stress environments.

‌Electrical performance‌: G7 board has high electrical insulation performance, excellent resistance to leakage tracking and arc resistance. This ensures that electrical equipment can maintain a stable insulation state in normal operation and fault conditions, prevent current leakage and arc discharge, and thus protect the safety of equipment and personnel.

‌Chemical corrosion resistance‌: G7 sheet has good oil resistance, mildew resistance, and arc resistance. And it is suitable for use in humid environments and transformer oil. This allows it to maintain stable performance in various harsh environments.

Specific uses of G7 sheet

1. Application in motors and electrical equipment

Insulating structural parts: In motors and electrical equipment, G7 sheet is often used as insulating structural parts. Because it has high mechanical and electrical properties and can withstand certain mechanical loads and maintain stable insulation performance, it has become an ideal material for manufacturing key insulating parts in motors and electrical equipment.

Slot wedge: In the motor, slot wedge is an important component for fixing the stator winding. G7 sheet is often used as slot wedge material due to its good insulation performance and mechanical strength to ensure the stability and safety of the winding during the operation of the motor.

Arc spacer: In electrical equipment such as air switches, G7 sheet can be used as arc spacer. When the electrical equipment generates an arc when disconnecting the circuit, the arc spacer can effectively isolate the arc to prevent the arc from causing damage to equipment and personnel.

2. Application of G7 sheet in transformer and reactor

Transformer insulation parts: In transformer, G7 sheet is widely used as insulation parts, such as insulation partition between windings, insulation coating on the inner wall of oil tank, etc. These insulation parts not only ensure the electrical isolation inside the transformer, but also improve the insulation strength and withstand voltage capability of the transformer.

Insulation support in reactor: In reactor, G7 sheet is used as insulation support material to isolate the electrical connection between different potentials. At the same time, G7 sheet can also withstand the mechanical stress generated by the reactor during operation, ensuring the safe and stable operation of the reactor.

As an insulating material, G7 sheet has a wide range of application value in the field of electrical and electronic engineering. Its unique performance characteristics make it an indispensable insulating component in many electrical equipment. In the future development, with the advancement of science and technology and the continuous changes in the market, the application field of G7 sheet will be further expanded, making greater contributions to the development of the field of electrical and electronic engineering.