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What are the applications of high-voltage insulation powder coatings in the electrical industry
source：www.cnjindu.com | Release time：2026年06月16日1、 Complete set of high and low voltage transmission and distribution equipment (core of power grid)
1. Copper/aluminum insulated busbar (the most mainstream application)
10kV/35kV switchgear, inflation cabinet, busbar trunking, energy storage busbar, and copper busbar for substation connection with special insulation coating:
The coating thickness is 0.8-2mm, and the 2mm coating can withstand 50kV power frequency withstand voltage for 1 minute, reducing the safe distance between phases inside the cabinet and achieving cabinet miniaturization;
Solve the problem of weak insulation at the sharp corners and bends of copper bars, prevent moisture and condensation, and eliminate phase to phase short circuits and grounding leakage;
Suitable for wind power box transformers, photovoltaic inverters, and high-voltage ring main unit busbars.
2. High voltage switch cabinet and internal metal components
High voltage switchgear, ring main unit, GIS inflatable cabinet metal bracket, isolation switch base, grounding knife metal parts;
The transformer housing, insulator metal base, and cable branch box metal lining combine insulation isolation, corrosion prevention, and rust prevention;
Spray coating of non-metallic insulation support components for dry-type ring main unit to enhance partial discharge tolerance.
3. Cable matching power hardware
Cable trays, metal enclosures for cable joints, high-voltage terminal blocks, metal flanges for wall penetrations, insulation against induced electricity and leakage, outdoor modified powder resistant to salt spray and moisture.
2、 Transformer, reactor, and transformer industry
Dry type transformer: iron core clamp, coil metal frame, low voltage lead metal end, tap changer metal parts; High purity epoxy powder has low dielectric loss, prevents partial discharge, and meets F/H level heat resistance (155/180 ℃).
Reactor (filter/wind/photovoltaic): Metal components of the iron core, metal fixing parts at the end of the coil, stable insulation under long-term heating conditions, flame retardant V-0 level, to avoid coil crawling and electrical breakdown.
Voltage/current transformer: metal casing, primary terminal post, mounting base, isolating high voltage from the casing grounding to prevent the casing from being charged and causing injury.
3、 Various types of AC/DC motors and generators (rotating electrical)
1. Industrial large and medium-sized motors
Stator core, rotor laminations, metal fixed brackets at coil ends, and insulation coating for flat wire fed stator, replacing immersion in insulation paint. The edges and corners are fully covered without pinholes, improving the reliability of inter turn insulation; Suitable for water pump motor, fan motor, air compressor motor, and high voltage motor of rolling mill.
2. New energy drive motors (new energy vehicles/construction machinery)
The stator of the flat wire motor and the metal sheath of the rotor of the permanent magnet motor have H-grade heat-resistant insulation, can withstand high voltage (300-800V DC) of the vehicle, withstand cold and hot cycles, and withstand corrosion from coolant. They have passed UL insulation certification.
3. Micro motors and servo motors
Stepper motors, servo motor housings, coil frame metal inserts, and small precision parts are uniformly coated with thin insulation to avoid electromagnetic interference and leakage.
4. Generator
Wind turbine generator, diesel generator stator iron core, collector ring metal base, outdoor weather resistant insulation powder suitable for high-altitude and coastal salt spray environments.
4、 New energy high-voltage electrical (core increment of new energy track)
1. High voltage system for new energy vehicles
Aluminum busbar inside the battery pack, metal shell of high-voltage connector, metal plug of charging gun, conductive connector of PDU distribution unit;
The coating is resistant to 600-800V DC high voltage, flame retardant, and resistant to electrolyte corrosion, enhancing the high-voltage safety level of the entire vehicle.
2. Energy storage power station (electrochemical energy storage)
Copper busbars for energy storage clusters, BMS metal brackets, high-voltage conductors inside the energy storage inverter PCS, thick film insulation to reduce cabinet volume, moisture-proof and anti condensation, suitable for container energy storage in enclosed high humidity environments.
3. Photovoltaic and wind power converters
The copper busbar of the inverter power and the metal base of the wind power variable pitch high-voltage module provide insulation that does not fail under large temperature differences between day and night, and resist outdoor wind, sand, and salt spray erosion.
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