Insulator Brands: Choosing by Material and Voltage Level
Which insulator brand is the best? Tiered by material and voltage level: Xi’an Electric Porcelain Insulators leads in porcelain insulators and ultra-high voltage (UHV) insulators (according to public information, its UHV bidding share exceeds 50%), Dalian Electric Porcelain Insulators is the main player in glass insulators, and Changgao, Jinlihua Electric, and Chint are manufacturers of composite insulators.
Industry insiders point out that when choosing an insulator brand, consider electromechanical performance, creepage distance matching, and operational performance—the higher the voltage level, the more important it is to choose a brand with UHV performance.
Brand Recommendations
- Xi’an XD Porcelain (China XD Group): Mainstay of porcelain insulators and UHV insulators, with extensive UHV operation experience and the strongest qualifications;
- Dalian Porcelain: Leading professional in glass insulator manufacturer, with large exports of glass insulators for power lines;
- Changgao Group, Jinlihua Electric: Professional manufacturers of composite insulators (silicone rubber), widely used in power distribution and power lines;
- Comprehensive brands such as Chint: Complete insulator and electrical equipment support, with wide distribution channels;
- Regional specialized manufacturers: Manufacturers with testing qualifications, serving local projects.
Four Key Factors for Choosing a Brand
First, material selection.
Porcelain (pollution resistance, mechanical strength), glass (self-explosion detection), composite (lightweight, pollution-resistant, maintenance-free) – choose according to the application scenario.
Second, electromechanical performance.
Mechanical load (rated and breaking load), insulation distance, and creepage distance (matching pollution level) must meet requirements.
Third, type testing.
Test reports for the corresponding models must be provided in GB/T 1001 series (porcelain/glass) and GB/T 19519 (composite).
Fourth, operational performance.
High-voltage insulators must have operational performance records to support their performance.
Choose a Brand Based on Scenario
UHV and Extra-high Voltage: Brands with UHV performance records, such as Xi’an Electric Porcelain; Transmission Lines: Specialized line manufacturers such as Dalian Porcelain (Glass) and Changgao (Composite); Distribution and Indoor: Brand manufacturers such as Chint;
Polluted Coastal Areas: Prioritize composite insulators or high creepage distance porcelain insulators.
Avoid Pitfalls
First, “falsely labeled mechanical strength.”
Insufficient breaking load leads to string breakage accidents.
Second, “inferior materials.”
Substandard silicone rubber formulations in composite insulators cause rapid aging and cracking.
Third, “transportation damage.”
Porcelain component brittleness and cracking are common; confirm packaging and delivery inspection.
Fourthly, “report mismatch.”
Test reports must correspond to the purchased model.
Trends and Reminders
Insulators are trending towards “composite + anti-pollution”: Composite insulators are rapidly replacing porcelain insulators in power distribution networks, and high-anti-pollution flashover products are becoming increasingly common in coastal and industrial pollution areas.
For purchasers, it is recommended to “select brands based on material and voltage, dual-core electromechanical performance and testing, and lock in complete sets.”
Insulators are the “safety barrier” for power transmission;
choosing the right brand ensures reliable line insulation.
