Glass Insulators & Ceramic (Porcelain) Insulators Manufacturers
ZZNH Power manufactures a wide range of glass and ceramic insulators—disc, pin, post and hollow-core types—rated from distribution to extra-high voltage. We offer custom mechanical ratings, surface treatment options and full factory testing to ensure stable long-term operation and the lowest lifecycle cost.
Buy Glass & ceramic（porcelain） Insulators — OEM Supply & Global Export
Tempered glass disc insulators offer smooth surfaces, high mechanical strength and excellent resistance to aging. Typical applications include disc strings for overhead transmission and suspension connectors.
- High dielectric strength and low moisture absorption
- Easy visual and acoustic detection of damage (cracks are visible/identifiable)
- Strong resistance to surface aging and pollution when properly specified
- Compatible with standard suspension and pin fittings; available in custom diameters and coatings
Porcelain (ceramic) insulators are made from high-strength electrical ceramics, typically finished with a glaze to improve surface performance. They are widely used in pin, post and disc configurations across medium to extra-high voltages.
- Excellent thermal stability and resistance to thermal shock
- High compressive and bending strength — ideal for post and structural applications
- Glazed surfaces increase pollution performance and extend service life
- Available in custom formulations and large diameters for extra-high voltage systems
Glass Disc Insulators
| Model | Rated Voltage | Mechanical Strength (kN) | Disc Diameter (mm) | Weight (kg) | Material | Standards |
|---|---|---|---|---|---|---|
| U70 | 10 kV | 20 | 70 | 0.35 | Tempered glass | IEC |
| U160 | 35 kV | 40 | 160 | 1.2 | Tempered glass | IEC 60383 |
| U250 | 110 kV | 60 | 250 | 2.6 | Tempered glass | IEC |
Glass vs. Ceramic — Quick Comparison
| Feature | Glass Insulator | Ceramic (Porcelain) Insulator |
|---|---|---|
| Self-cleaning | Excellent (smooth surface) | Good (glaze dependent) |
| Damage detection | Very easy (visible cracks) | More difficult (internal fractures) |
| Mechanical impact resistance | Excellent (good impact tolerance) | High compressive strength |
| Thermal / shock resistance | Moderate | Very good |
| Weight | Lighter | Heavier |
| Cost | Competitive | Competitive to higher (depending on glaze/porcelain grade) |
| Recyclability | Good (glass recyclable) | Limited |
| Typical applications | Long suspension strings, overhead transmission | Posts, bushings, substations, high pollution sites |