High-Quality Electrical Insulation Component Line to Support Global Grid Infrastructure Development
Comking Electric, a leading Insulating Part manufacturer China, has launched two new core components for medium-voltage power distribution systems: Supporting Insulators for gas-insulated RMUs and 12kV bottom Isolation Circuit Breaker Poles for solid-insulated RMUs.
Technical Specifications
The Supporting Insulators are engineered to securely mount circuit breakers or disconnectors within the gas-insulated tank of Ring Main Units (RMUs).
Designed for 12kV voltage class with current ratings of 630A and 1250A, these components undergo rigorous testing protocols including X-ray inspection, 48kV power frequency withstand voltage for 1 minute, and partial discharge control at ≤5pC under 15kV.
Complementing this offering are the 12kV bottom Isolation Circuit Breaker Poles, specifically designed for solid-insulated RMUs in bottom isolation schemes.
These poles work seamlessly with unshielded busbars and shielded front connectors, featuring enhanced performance metrics including lightning impulse withstand of 75kV phase-to-earth and 85kV across break distance, with partial discharge maintained at ≤5pC under 1.2Ur.
Quality Assurance Process
As a specialized Supporting Insulators Wholesale China supplier, Comking Electric implements a comprehensive quality verification system spanning from raw material selection to finished product delivery.
Each component undergoes multiple critical validations. X-ray detection ensures internal integrity without bubbles or impurities—fundamental for long-term operational reliability.
Power frequency withstand voltage tests validate insulation performance under specified voltages, while partial discharge testing guarantees against accelerated aging during continuous operation.
Particularly for circuit breaker poles, additional lightning impulse testing and circuit resistance verification (≤70μΩ) ensure stability during transient overvoltage events and continuous current-carrying operation.
Industry Applications
Positioned as a dependable Circuit-Breaker Pole Supplier China, Comking Electric products are increasingly deployed in global medium-voltage power distribution projects.
The Supporting Insulators are particularly suited for gas-insulated RMUs requiring compact designs and reliable performance, providing both secure mounting and excellent insulation in various environmental conditions.
The 12kV bottom Isolation Circuit Breaker Poles, designed specifically for modern solid-insulated RMUs, offer enhanced safety and operational convenience through their bottom isolation configuration.
These standardized components provide equipment manufacturers with integrated solutions that reduce system complexity and accelerate production cycles.
Corporate Capabilities
With focused expertise in electrical insulation component development, Comking Electric has established itself as a trusted international supplier through technical proficiency and manufacturing capacity. The company also offers customized distribution automation solutions to meet the specific technical needs of different power equipment manufacturers.
Helping global customers build safer and more reliable power distribution networks.