Zirconia Ceramic Insulating Posts: Reliable Insulation And Support Solution For

Product Specification

Zirconia Ceramic Insulating Posts: Reliable Insulation And Support Solution For High-Voltage Electrical Equipment​

Introduction

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.

Applications

• 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

Advantages

1. Ultra-High Mechanical Strength: Flexural strength ≥1000MPa, capable of withstanding enormous mechanical loads and electromagnetic forces

2. Excellent Insulation Performance: Volume resistivity >10¹⁴ Ω·cm, dielectric strength >20 kV/mm

3. Superior Arc Resistance: Arc ablation resistance far exceeds that of organic materials such as epoxy resin

4. Very Low Dielectric Loss: tanδ <0.002, reducing energy loss during operation

5. Excellent Environmental Stability: Strong weather resistance, unaffected by humidity and temperature changes, service life up to 30 years

Specification Parameter Table

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

After-Sales Service

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.

FAQ

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%.