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Quality and Compliance: Manufactured in accordance with ANSI 57-5 standards, certified by ISO9001 quality system. The high-alumina ceramic material ensures consistent performance and is compatible with international project acceptance standards.
Structure and Process: The 57-5 column-type porcelain insulator uses solid non-breakable porcelain pieces and high-strength metal accessories. The rated mechanical breaking load reaches 12.5KN. The adhesive assembly process guarantees both mechanical and electrical reliability, making it suitable for harsh conditions.
Economy and Environmental Friendliness: The column-type porcelain insulator is designed with a 30-year lifespan. Its maintenance-free feature is remarkable, reducing the total life cycle cost.
Customization: Supports OEM parameter fine-tuning. The number of umbrella skirts, glaze color, and metal accessory materials can be adjusted to balance between general and personalized needs.
Model | ANSI 57-5 |
Creepage distance (mm) | 1145 |
Dry Arcing Distance(mm) | 438 |
Cantilever Strength(kN) | 12.5 |
Type application voltage (kV) | 66 |
Low frequency dry flashover voltage (kV) | 175 |
Low frequency wet flashover voltage (kV) | 150 |
Critical impulse flashover voltage, positive (kV) | 290 |
Critical impulse flashover voltage, negative (kV) | 380 |
Test voltage to ground (kV) | 44 |
Max RIV at 1000KHz (μv) | 200 |
Net weight, approximate (kg) | 18 |
Color | Brown or White |
Medium and high voltage distribution network (mainly 25kV - 35kV): Support and insulation for conductors of straight poles, turning poles, and branch poles of overhead distribution lines in urban and rural areas.
Substations and switch stations: Conductive parts for supporting busbars, disconnectors, circuit breakers, etc., isolation of live parts from grounding structures, meeting the higher insulation and mechanical strength requirements within the station.
Industrial and special power facilities: Insulation of contact wire pillars for electrified railways, self-owned power plants of large industrial and mining enterprises, and distribution networks in factory areas.
Line renovation and upgrading projects: Upgrade of insulation performance of old lines, sections with higher requirements for mechanical and insulation performance during power grid expansion.
1. What about your delivery time?
It should depend on your order quantity.
2. How can you guarantee quality?
Samples are available and we can send to you. The sample fee will be deducted from your first order. We always do the final inspection before shipment.
3. What is the payment terms?
T/T 30% deposit in advance, and 70% balance payment before shipment.
4. What else can you do for us?
We supply the customized services, reply your inquiry within 24 hours and support the excellent after-sales services.
