Application of UPGM203 in Generators

Time: 10-13 2025 Auther: Xujue Electrical

What Is UPGM203 Material? UPGM203 is a glass fiber reinforced unsaturated polyester molding laminate, known for its ...

What Is UPGM203 Material?

UPGM203 is a glass fiber reinforced unsaturated polyester molding laminate, known for its high mechanical strength, electrical insulation, and heat resistance.
It is made by impregnating non-alkali glass mat with unsaturated polyester resin and curing under high temperature and pressure.
This material is widely used in motors, generators, transformers, and switchgear.

Standard: IEC 60893 / NEMA GPO-3

Thermal Class: B (130°C) to F (155°C)

Color: Red or light pink

Flame Retardant: UL94 V-0

GPO3 insulation board

Main Applications of UPGM203 in Generators

UPGM203 performs critical insulating and structural roles inside both synchronous and asynchronous generators.
Below are the key parts where UPGM203 is commonly used:

Component	Function	Required Properties	Benefits of UPGM203
Stator End Support Plate	Supports stator coils and withstands mechanical stress	High strength, heat resistance	Prevents coil deformation and ensures long-term insulation reliability
Slot Wedge / Slot Liner	Holds coils firmly in slots	Dielectric strength, stability	Reduces movement and vibration of windings
Phase Separator	Separates different phase windings	High dielectric insulation	Enhances phase-to-phase insulation safety
Terminal Board	Mounts and isolates terminal connections	Flame resistance, moisture proof	Prevents arcing and leakage current
Insulating Spacer & Support Blocks	Provides mechanical support	High rigidity and electrical insulation	Replaces metal supports to eliminate short-circuit risk

Performance Advantages of UPGM203

1. Excellent Electrical Insulation

Dielectric strength ≥ 14 kV/mm

High surface resistivity prevents leakage current and corona discharge

2. Strong Mechanical Strength

Flexural strength ≥ 150 MPa

Maintains stability even under high temperature and mechanical vibration

3. High Heat and Flame Resistance

UL94 V-0 flame retardant grade

Long-term operation temperature up to 155°C

4. Moisture and Chemical Resistance

Performs well in humid or oil-filled generator environments

Resists acid, alkali, and oil corrosion

Case Studies

1. 1000 kW Synchronous Generator

UPGM203 is used as the stator end support plate, replacing traditional epoxy board.
It reduces weight by 15% and increases the thermal class to F level, ensuring stable long-term performance.

2. Diesel Generator Terminal Insulation Board

UPGM203 provides excellent dielectric strength and flame resistance, extending operational life by 30%.

Alternative and Complementary Materials

Material	Comparison	Typical Use
GPO-3 Sheet	Similar to UPGM203, lower cost	General motor and control cabinet parts
G10 / FR4 Epoxy Board	Higher mechanical strength, higher cost	High-speed or precision generators
DMC Molding Parts	Suitable for complex shapes	Small and medium-sized motor components

Why Choose Xujue Electrical UPGM203?

Xujue Electrical is a professional manufacturer of insulation materials in China, offering a full range of UPGM203 sheets and molded parts.
Our products are certified, customizable, and widely used by generator OEMs worldwide.

Factory-direct supply, guaranteed quality

Custom machining for insulation components

Fast delivery and export-ready packaging

Leave us a message to get quotation and sample!

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