G10 sheet applications and selection in switchgear

Applications of G10 Insulation sheet  in Switchgear Insulating Support Components Application: Used to suppor...

Applications of G10 Insulation sheet  in Switchgear

1. Insulating Support Components

Application: Used to support and fix busbars inside the switchgear, ensuring safe clearance between phases and structural stability.

Features: Excellent dimensional stability and dielectric strength; capable of withstanding high voltage and mechanical loads over long periods.

2. Barrier Boards / Interphase Insulation

Application: Provides electrical isolation between phases or between phase and ground, effectively preventing arc flash or flashover incidents.

Features: High dielectric strength and heat resistance; can withstand temporary overvoltage conditions.

3. Bent or Custom-Shaped Parts

Application: Formed through CNC machining or thermoforming; used as brackets, connectors, or structural parts in complex assemblies.

Features: Highly machinable and customizable to meet the needs of non-standard switchgear designs.

4. Mounting Base Plates / Insulating Pads

Application: Serve as mounting bases for electrical components or insulating spacers to eliminate conductive contact between metal parts.

Features: Smooth surface, flatness, and easy installation and maintenance.

Selection Guidelines for G10 in Switchgear

Selection Criteria	Recommendations
Thickness	Common thicknesses include 3mm, 5mm, 8mm, and 10mm, selected based on voltage rating and structural load; 8–10mm is typical for main busbar supports.
Thermal Class	G10 typically meets Class B (130°C) requirements, suitable for medium and high-voltage switchgear. For higher thermal demands, G11 (Class H, 180°C) is recommended.
Mechanical Strength	Use high-strength G10 boards with flexural strength over 350 MPa to ensure long-term mechanical performance.
Machining Precision	For complex parts, choose boards with smooth surfaces and tight thickness tolerances to maintain dimensional accuracy after machining.
Flame Retardancy	If flame resistance is required, consider using FR4 (flame-retardant grade of G10) as an alternative.