Dayoo Advanced Ceramic Co.,Ltd
Dayoo Advanced Ceramic Co.,Ltd
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Zirconia Ceramic Insulating Posts: Reliable Insulation And Support Solution For High-Voltage Electrical Equipment
Zirconia ceramic insulating posts are high-performance insulating structural components specifically designed for high-voltage electrical equipment. Manufactured from high-purity zirconia (ZrO₂) using phase transformation toughening technology, they exhibit extremely high mechanical strength, excellent insulation properties, and outstanding anti-aging capabilities. These components can operate stably for long periods under high voltage, high mechanical load, and harsh environmental conditions, making them ideal insulating support elements for power equipment such as transformers, circuit breakers, and disconnectors.
Transformers: Insulating supports for high-voltage windings, bushing insulating posts
Circuit Breakers: Insulating supports for arc extinction chambers, operating rod insulating parts
Disconnectors: Insulating posts for knife switches, insulating supports for moving and static contacts
Gas Insulated Switchgear (GIS): Support structures for basin-type insulators, conductor fixing insulating parts
Power Capacitors: High-voltage lead-out insulating posts, internal insulating supports
Ultra-High Mechanical Strength: Flexural strength ≥1000MPa, capable of withstanding enormous mechanical loads and electromagnetic forces
Excellent Insulation Performance: Volume resistivity >10¹⁴ Ω·cm, dielectric strength >20 kV/mm
Superior Arc Resistance: Arc ablation resistance far exceeds that of organic materials such as epoxy resin
Very Low Dielectric Loss: tanδ <0.002, reducing energy loss during operation
Excellent Environmental Stability: Strong weather resistance, unaffected by humidity and temperature changes, service life up to 30 years
| Performance Indicator | Unit | ZY-60 Series | ZY-80 Series | ZY-99 Series |
|---|---|---|---|---|
| Zirconia Content | % | ≥95 | ≥99 | ≥99.5 |
| Bulk Density | g/cm³ | 5.9-6.0 | 6.02-6.05 | 6.04-6.06 |
| Flexural Strength | MPa | 1000 | 1200 | 1400 |
| Dielectric Strength | kV/mm | 20 | 22 | 25 |
| Volume Resistivity | Ω·cm | 10¹⁴ | 10¹⁵ | 10¹⁵ |
| Thermal Expansion Coefficient | ×10⁻⁶/K | 10.5 | 10.3 | 10.2 |
| Maximum Operating Temperature | ℃ | 800 | 1000 | 1200 |
Process Flow
High-purity zirconia powder → Stabilizer addition → Spray granulation → Isostatic pressing → Pre-sintering → CNC precision machining → High-temperature sintering → Ultrasonic cleaning → Dielectric performance testing → Mechanical performance testing → Laser marking → Vacuum packaging
Usage Instructions
Clean the installation surface before mounting to ensure freedom from oil, dust, and other contaminants
Use a torque wrench to tighten to the recommended torque to avoid stress concentration from over-tightening
Regularly inspect the surface for cracks and tracking traces; comprehensive inspection every 5 years is recommended
In areas with high pollution levels, additional maintenance of anti-flashover coatings is advised
Free technical consultation, installation guidance, 24-month warranty period, on-site fault analysis and technical modification support, and certification assistance for UL, CSA, IEC, etc.
Q1: What are the advantages of zirconia ceramic insulators compared to traditional porcelain insulators?
A: Mechanical strength is 3-5 times higher, weight is reduced by 40%, insulation performance is more stable, and service life is extended by more than 2 times.
Q2: Are they suitable for extremely cold environments?
A: Yes, zirconia ceramics have excellent thermal stability and can operate normally in environments from -60°C to +800°C.
Q3: How to determine if an insulating post needs replacement?
A: Replacement is immediately required when lengthwise cracks appear, surface tracking traces exceed standard requirements, or insulation resistance decreases by 50%.
