China DRM-12 SF6 Gas Insulated Switchgear Suppliers - Quality Factory Manufacturing Specifications
Model and meaning
Product description
DRM-12 Fully insulated and fully enclosed main ring unit switchgear (standardized) independently developed by our company has been listed as a high-tech product of Zhejiang Province by China’s National High-Voltage Electrical Apparatus Testing Center in type test and Zhejiang Province High-Tech Technology Project. It is widely used in 10kv/6kv power distribution systems and is preferred by various urban and rural users of power distribution systems.
The switchgear is modular and can be combined for various purposes; it consists of two categories: non-expandable unit combination and expandable unit combination, to meet the needs of various power substations in flexible applications of compact switchgears.
DRM-12 fully insulated and fully enclosed main ring unit switchgear (standardized) is a completely sealed system, with all live parts and switches enclosed in a stainless steel shell. The whole switchgear isn’t influenced by external environmental conditions to guarantee reliable operation and personal safety and is free from maintenance. By an expandable bus, any combination is available and fully modular. The expandable bus is insulated and shielded safely to guarantee high reliability and safety. DRM-12 inflatable switchgear can also provide TV-based automation solutions with a concept of intelligent switchgear and minimize the work of on-site installation and commissioning.
DRM-12 Fully insulated and fully enclosed main ring unit switchgear (standardized) has non-expandable standard configuration and expandable standard configuration. Owing to its fully-modular and half-modular combination and expandability it is especially flexible.
DRM-12 fully insulated and fully enclosed main ring unit switchgear (standardized) conforms to GB standards. Its design life is over 30 years in indoor conditions (20° C).
Performance index
Main Features
The fully insulated and fully enclosed (standardized) main ring unit metal switchgear adopts SF6 gas as arc extinguishing and insulating medium.
Fully enclosed and insulated. Bus, switches, and live parts are enclosed in a 3mm stainless steel shell filled with SF6 gas at 0.04Mpa (IP67). Unaffected by environmental conditions, including short-time water immersion. Maintenance-free for life.
Equipped with a perfect five-protection interlocking mechanism to prevent operational faults and injuries. Features reliable pressure relief channels to protect operators under extreme conditions.
Available in non-expandable and expandable combinations. Supports front/side cabling or side expansion. Ideal for limited spaces. Can integrate electric actuators, remote control, and monitoring systems.
Offers large feeder capacity while occupying a minimal footprint, making it suitable for a wide range of demanding applications.
Design description
DRM-12 is installed on a galvanized sheet frame with the switchgear inside an SF6 gas tank made of corrosion-proof and non-magnetic 3mm-thick stainless steel sheet. The SF6 gas tank is a "sealed pressure system" designed to run for 20 years in normal work conditions with a normal operation pressure of 0.03-0.25Mpa. The gas tank is equipped with a pressure relief device to release gas from the bottom or back if pressure becomes too high.
The load switch uses a coaxial rotating double-breakpoint method operated through a single operation hole and slide plate. It can only occupy one of three states ("closing", "breaking", "grounding") at any time to prevent operational errors.
The switch actuator is installed in the front of the gas tank and treated with special techniques to remain corrosion-proof. It is designed for easy manual operation and maintenance, or electrical actuation.