China DRM-12 SF6 Gas Insulated Switchgear Suppliers | High-Quality Factory Cabinet Solutions
Introducing the DRM-12 Standardized Ring Cabinet, a cutting-edge solution designed to meet strict industry standards, including DL/T 728 and DL/T 79Our cabinet utilizes SF6 gas that complies with IEC standards, ensuring optimal performance and reliability, The standardized ring network cabinet features a load switch unit and cable connection unit with a compact width of 375mm, while the circuit breaker and combined electrical unit cabinet measures 420mm in width. The cabinet also accommodates a PT unit with isolation switch, boasting a base width of 600mm. It has a depth of 750mm and a maximum projection distance of ≤850mm. Standing tall at 1950mm, the cabinet includes an instrument box that adds an additional height of 350mm and a front height (excluding the instrument box) of 1600mm, Constructed from high-quality materials, the shell (gas box) features a corrosion-resistant design made of 304 stainless steel with a nominal thickness of ≥ 2mm. The cabinet frame is crafted from aluminum-zinc plate, with the galvanized layer reaching AZ150 or greater, adhering to EN 10346:2015 standards for continuous hot-dipped aluminum-zinc alloy coated steel plate and strip, As a leading factory in China, we take pride in supplying durable and efficient solutions to meet the demands of the electrical industry. Trust us as your reliable partner for high-quality electrical products
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
SF6 Gas & Enclosure
SF6 Gas PressureAbsolute pressure 0.04Mpa at 20°C
Annual Gas Leak Rate0.05%
Ingress ProtectionIP67
Stainless Steel Thickness3.0mm
Bus & Color Specifications
Bus in Switchgear400mm² Cu
Grounding Bus150mm² Cu
Front Panel ColorRAL7012
Side Panel & Cover ColorRAL7035
Normal Work Conditions
Maximum Temperature+40°C
Minimum Temperature-40°C
Max Average Relative Humidity≤95%
Altitude≤2000 m
Compliant Standards
IEC60056IEC60129IEC60265IEC60298IEC60420IEC60694
Main Features
The fully insulated and fully enclosed (standardized) main ring unit metal switchgear adopts SF6 gas as arc extinguishing and insulating medium.
Reliable operation
The switchgear is fully enclosed and fully insulated, the bus, switches and live parts are completely enclosed in its stainless steel shell. The cavity is filed with SF6 gas at 0.04Mpa, and its ingress protection is IP67. The whole switchgear is not influenced by external environmental conditions, even in special conditions such as short-time water immersion, its normal operation is guaranteed and it is free from maintenance for its whole life.
Operation safety
The switchgear is equipped with a perfect five-protection interlocking to prevent any personnel injury or fault due to any error in operation. All switchgears are equipped with reliable pressure relief channels to guarantee operators personal safety in special conditions.
Flexible configuration
The switchgears are divided into two types: non-expandable combination and expandable combination, with cabling from the front or cabling from the side or expanded from the side according to various installation positions, The cabinet is easy to install, is ideal for a small space or an area with unfavorable environmental conditions. The switchgear can be equipped with electric actuator,remote control and monitoring device according to various users needs.
Widely applicable
With great feeder capacity and a small area occupied for various applications.
Design description
◆ Technical description
DRM-12 fully insulated and fully enclosed main ring unit switchgear (standardized) is installed on a galvanized sheet frame with 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” that can run for 20 years in normal work conditions. The SF6 gas normal operation pressure is 0.03-0.25Mpa. The gas tank is equipped with a pressure relief device to guarantee that the gas can be relieved from the bottom or the back when the pressure is too high.
◆ Switchgear
The load switch with coaxial rotating double-breakpoint method is operated in a same operation hole and a same slide plate to carry out kinetic operation, so it can only be in one of the three states of “closing, breaking, grounding” at any time to prevent any error in operation.
◆ Actuator
The switch actuator is installed in the front of the gas tank and is treated by special technique to be corrosion-proof, easy to operate and maintain manually or actuate electrically.
Frequently Asked Questions (FAQ)
What is the design life of the DRM-12 switchgear?
The design life of the DRM-12 fully insulated and fully enclosed main ring unit switchgear is over 30 years under indoor conditions (20°C).
What is the Ingress Protection (IP) rating and environmental resistance of this switchgear?
The switchgear has an Ingress Protection rating of IP67. It is fully sealed in a stainless steel shell, meaning it is not influenced by external environmental conditions and can even withstand short-time water immersion.
What gas is used for insulation and what is its leakage rate?
The DRM-12 switchgear uses SF6 gas as the arc extinguishing and insulating medium. It has an extremely low annual gas leak rate of only 0.05%.
What safety mechanisms are built into the switchgear?
It features a perfect five-protection interlocking system to prevent personnel injuries or faults from operation errors. It is also equipped with reliable pressure relief channels to release high pressure safely from the bottom or back.
Is the DRM-12 switchgear expandable?
Yes, the switchgear is highly modular and flexible. It is available in both non-expandable standard configurations and expandable standard configurations to meet the needs of various power substations.
What are the normal operating temperature limits for the DRM-12?
The switchgear is designed to operate reliably in ambient temperatures ranging from a minimum of -40°C to a maximum of +40°C.
