Power System 12kV/24kV, 50Hz
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
This 22kV SF6 GIS RMU Ring Main Unit Switchgear is a core intelligent device developed by Huajidian for medium-voltage power distribution systems. Breaking away from the structural limitations of traditional equipment, the product adopts a compact modular design, highly integrating core functional units such as circuit breakers, disconnect switches, grounding switches, and instrument transformers. The cabinet structure is streamlined and compact, suitable for confined installation scenarios such as urban substations and prefabricated substations.
The equipment's control panel features a user-friendly layout, equipped with intelligent monitoring instruments and a visual observation window for real-time monitoring of equipment operation. As a reliable supplier, Huajidian supports customized solutions based on users' actual power distribution needs, comprehensively covering power distribution requirements in various scenarios such as civil buildings, industrial parks, and key infrastructure projects.
The equipment uses SF6 gas or environmentally friendly gas for internal insulation, and the live parts have a fully sealed structure, completely isolating them from external moisture, dust, debris, and small animals, eliminating the risk of short circuits and leakage at the source. It also strictly adheres to the "five-proof" design specifications for power systems, equipped with interlocking operating mechanisms and dual mechanical interlocking protection for the cabinet doors, effectively preventing misoperation issues such as opening and closing switches under load or accidentally entering live compartments, comprehensively ensuring the safety of maintenance personnel.
The 22kV SF6 GIS RMU Ring Main Unit Switchgear cabinet is made of high-quality cold-rolled steel plate or aluminum-zinc coated steel plate, treated with a fine anti-corrosion spraying process. It boasts high mechanical strength, wear resistance, and corrosion resistance, enabling long-term stable operation in complex indoor and outdoor environments such as high temperature, high humidity, and dust. The annual gas leakage rate of the gas-filled switchgear is ≤0.1%, ensuring strong equipment operational stability and significantly reducing subsequent maintenance costs.
The product adopts a standardized functional module design, allowing for free combination of incoming and outgoing line units, PT units, and transformer units according to on-site power distribution needs, meeting the personalized configuration requirements of different projects. The panel is scientifically partitioned, with standardized arrangement of buttons, knobs, and instruments. It comes standard with clear operating procedure instructions, electrical main wiring simulation diagrams, and high-voltage warning signs, reducing operator learning costs and the risk of accidental activation, achieving standardized and simple operation.
Built-in intelligent monitoring instruments can sense the internal air pressure, temperature, and operating status of the equipment in real time, promptly reporting faults and anomalies, achieving intelligent early warning and remote monitoring. The fully sealed, integrated structure eliminates the need for frequent maintenance and parts replacement, significantly reducing maintenance workload and achieving highly efficient and low-consumption operation.
Huajidian 22kV SF6 GIS RMU Ring Main Unit Switchgear has undergone multiple stringent industry tests, ensuring compliant and stable parameters that meet domestic and international standards for medium-voltage power distribution equipment:
- Rated Voltage: 12kV/24kV
- Rated Current: 630A/1250A
- Rated Frequency: 50Hz
- Power Frequency Withstand Voltage: 42kV/65kV
- Lightning Impulse Withstand Voltage: 75kV/125kV
- Protection Rating: Gas Chamber IP67/Cabinet IP4X
- Annual Gas Leakage Rate: ≤0.1% (Gas-Filled Cabinet)
With its compact structure, high safety, and high stability, this equipment is widely used in various mainstream medium-voltage power distribution scenarios:
1. Urban Support: Urban residential areas, commercial complexes, office building power distribution rooms
2. Industrial Power Distribution: Industrial parks, manufacturing plants medium-voltage power distribution networks
3. Urban Power Grid: Urban power distribution network upgrades and ring network power supply nodes
4. Key Infrastructure Projects: Power Supply Systems for Critical Facilities such as Airports, Railways, and Hospitals
1. Inner Mongolia Banner/County Urban Power Grid Renovation Project
The traditional ring main unit (RMU) in the old residential areas of Ejin Horo Banner, Inner Mongolia, had poor moisture and water resistance, making it prone to water ingress and short circuits during the rainy season, frequently affecting residents' normal power supply. This project adopted Huajidian 22kV SF6 GIS RMU RMU ring main units in batches. Relying on IP67 fully sealed protection and excellent corrosion resistance, it effectively resists water accumulation and erosion from humid environments during the rainy season, completely solving the problem of easy failure of old equipment. After the equipment was put into operation, the power supply failure rate in the area decreased by 95%, achieving uninterrupted and stable power supply to residents, and successfully completing the urban distribution network safety upgrade and renovation.
Q1: What is the service life and maintenance cycle of the 22kV SF6 GIS RMU ring main unit switchgear?
A: This Huajidian RMU ring main unit adopts a fully sealed corrosion-resistant structure and high-quality core components, with a designed service life of up to 30 years. Thanks to its ultra-low annual air leakage rate of ≤0.1% and fully enclosed dustproof and moisture-proof design, the equipment requires minimal maintenance. Routine inspections only require checking air pressure and operating status every six months, and comprehensive professional maintenance is needed every 3-5 years, significantly reducing long-term maintenance costs.
Q2: Can the equipment withstand harsh outdoor conditions such as high temperature and high humidity?
A: Yes. The equipment cabinet uses aluminum-zinc coated steel plates with a high-standard anti-corrosion spraying process, providing excellent weather resistance and corrosion resistance. Internal electrical components are fully sealed and protected, effectively resisting interference from harsh environments such as high temperature, high humidity, dust, and salt spray. It can operate stably in the range of -40℃ to +85℃, adapting to complex working environments in various regions of China.
Q3: Does the product support personalized customization and on-site installation guidance services?
A: Yes. As a professional manufacturer and supplier, Huajidian can provide comprehensive personalized customization of the equipment's inlet and outlet units, intelligent monitoring functions, protection parameters, and appearance markings according to project needs. We provide a one-stop service covering the entire lifecycle of a project, including solution design, on-site installation, commissioning, operation and maintenance, and after-sales support. Our professional technical team solves all kinds of on-site problems throughout the project.
Huajidian adheres to the quality philosophy of "zero-defect delivery and full-cycle service." All 22kV SF6 GIS RMUR ring main unit switchgear undergoes rigorous testing, including power frequency withstand voltage, partial discharge, and temperature rise, before leaving the factory to ensure that the products meet industry standards and project usage requirements. Relying on a standardized production system and a comprehensive after-sales system, we provide customers with professional, efficient, and reliable integrated power distribution equipment solutions, from solution design, equipment production, installation and commissioning to post-maintenance.
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