500kV Substation post composite insulator

Product Introduction

Post composite insulators consist of a core rod, end fittings, and a silicone rubber umbrella skirt sheath. They are mainly used for insulation and mechanical fixation of busbars and electrical equipment in power plants and substations. Their categories include post composite insulators for busbars, post composite insulators for reactors, and composite insulators for disconnectors, among other high-voltage electrical equipment.

The connection between the epoxy resin glass fiber rod and the fittings adopts a crimping process, with crimping parameters controlled digitally, ensuring consistent and reliable mechanical performance. The umbrella skirts and sheaths are made of silicone rubber, and the umbrella shape is designed with an aerodynamic structure, featuring excellent pollution flashover resistance. The sealing of the umbrella skirts, sheaths, and end fittings is achieved through high-temperature vulcanized silicone rubber integral injection molding, ensuring reliable interface and sealing performance.

Hollow composite insulators are composed of aluminum alloy flanges, glass fiber-reinforced resin sleeves, and silicone rubber umbrella skirt sheaths. They are commonly used in high-voltage electrical equipment such as GIS combined switches, transformers, mutual inductors, capacitors, arresters, cable accessories, and wall bushings.

The connection between the glass fiber-reinforced resin sleeve and the aluminum alloy flange adopts a process where a sealing ring is placed, followed by pressurization and epoxy bonding. The parameters are digitally controlled, ensuring consistent and reliable mechanical performance. The umbrella skirts and sheaths are made of silicone rubber, with an aerodynamic umbrella shape design that provides excellent pollution flashover resistance. The umbrella skirts, sheaths, and end fittings are sealed using a combination of high-temperature and room-temperature vulcanized silicone rubber molding processes, ensuring reliable interface and sealing performance.

Product Features

• Silicone rubber has excellent hydrophobicity and migration properties, with outstanding pollution flashover resistance. It can operate safely in heavily polluted areas without the need for manual cleaning or zero-value detection and maintenance.

• Reliable structure, stable performance, large safety margin for operation, high mechanical strength, and good seismic performance. It avoids phenomena such as porcelain breakage, collapse, and explosion, providing guarantee for the safe operation of power stations.

• Excellent high and low temperature resistance, atmospheric aging resistance, and ozone aging resistance.

• Lightweight, convenient for transportation and installation.

Main Parameters

• Rated voltage: 500KV

• Rated mechanical bending load: 4 - 12.5KN

• Rated mechanical tensile load: 100 - 120KN

• Rated mechanical torsional load: 3 - 6kN·m

• Rated mechanical compressive load: /KN

• Deflection under 2kN: 15 - 100mm

• Lightning impulse withstand voltage (peak value): ≥2250 - 2550kV

• Wet operating impulse withstand voltage (peak value): ≥1425 - 1550kV

• Power frequency one - minute wet withstand voltage (effective value): ≥750kV