China DFW10-12 Outdoor High Voltage Ring Main Unit (RMU) - Suppliers & Factory for Durable Solutions
Model Meaning
First and Second Fusion Standardized Ring Cage Product Introduction
The outer box of the metal material should be treated with anti-corrosion coating process, the coating is uniform and the thickness is consistent, the coating should have a firm adhesion to ensure that there can be no obvious rust spots in 20 years, and the box shell has an anti-sticker function.
Color Specification: The color of the ring cage is National network green, the CMYK value is C100M5Y50K40, and the PANTONE 3292C.
If there are special requirements, it should be kept in harmony with the surrounding cultural and geographical environment. The surface of the case should have obvious reflective warning signs to ensure that the color will not fade for 15 years.
The outer box should be set up with obvious signs, such as the name of the equipment, electrical hazards, etc. Signs and signs shall be made in accordance with the provisions of GDW 742.
The distribution automation terminal in the ring cage includes centralized DTU and distributed DTU. Centralized DTU and distributed DTU shall meet their respective technical requirements. The outdoor ring cage reserved for the automation interface should also reserve an independent distribution automation unit installation space, which is generally placed according to the DTU shielded vertical, and the reserved width space is not less than 600mm. The DC power supply system is installed in the box, and secondary wiring is completed.
- 4 Way: Box width of 3200mm
- 6 Channels: Box width of 4000mm
- Ring Cage Depth: 1150mm
- Height: ≤ 2300mm (Non-metallic height ≤ 2500mm)
- Door Opening Angle: Not less than 90°
Overview
With the continuous development and progress of society, great changes have taken place in China's urban power grid, and most cities have formed or are forming a large number of load-intensive areas. In the past, the power supply from the substation 12kV line (or branch line) to the direct user has been difficult to meet the requirements of urban development. Therefore, a new power supply method is produced by opening and closing the power supply to the user. However, with the intensification of urban densification, some of the original civil openings have been restricted by land and urban planning, so a more advanced and practical outdoor high-pressure ring cage (standardized) has emerged. The product does not need civil construction and occupies a small area, the configuration is very flexible, the power supply is more reliable, the construction and installation, debugging time is greatly shortened, and the overall cost is reduced.
With the development of modern industry, the degree of automation and intelligence of electrical control equipment is getting higher and higher. The use of modern electronic technology, sensor technology, communication technology, computer network technology, the power equipment in the normal and accident conditions of monitoring, protection, control, measurement and other integration, to achieve good management, has become an inevitable trend and development direction.
Outdoor high pressure ring cage (standardized) is the use of foreign advanced technology, install and adjust 12kv switchgear, circuit breaker, load switch, current and voltage transformer, 12kv power supply PT, switching station FTU, RTU, communication control terminal (CCU), 12kv metering and automatic meter reading, USP power supply and indicating instrument into a movable, sealed and moisture-proof stainless steel box. Thus, the integration and modular assembly of the primary and secondary systems of the urban distribution network are realized, the construction period is shortened, and the reliability of the urban power network operation is greatly improved.
Environmental Conditions of Use
- Altitude: < 1000m
- Maximum Ambient Temperature: +40°C
- Minimum Ambient Temperature: -25°C
- Maximum Daily Temperature Difference: 25K
- Indoor Relative Humidity: Daily average ≤ 95%, monthly average ≤ 90%
- Earthquake Resistance: Ground horizontal acceleration 0.2g; vertical acceleration 0.1g simultaneously. Resonance, sinusoidal and beat wave test methods were adopted. Exciting 5 times, 5 waves each time, each interval 2s, safety factor is not less than 1.67
- Installation Site: Should be free of gas vapor, chemical deposition, dust, pollution and other explosive and corrosive media that seriously affect the insulation of the load switch
- System Application: Used in ungrounded systems and 12kV systems grounded by small resistance or arc suppression coil
Meet the Standard
This product meets the latest issued and implemented national standards, industry standards and IEC standards. The relevant provisions contained in the following standards constitute the provisions of these technical conditions:
- GB 16926-1997: AC high voltage load switch and fuse combination appliance
- GB 3804-2004: 3.6kV~40.5kV high voltage AC load switch
- GB 3906-2006: 3.6kV~40.5kV AC metal enclosed switchgear and control equipment
- GB/T 11022-1999: High voltage switchgear and control equipment standard common technical requirements
- GB 4208-2008: Shell protection grade (IP code)
- IEC 420: High voltage AC load switch and fuse combination appliance
- IEC 298: AC metal enclosed switchgear and control equipment above 1 kV and below 52kV
- GB 1984-2003: High voltage AC circuit breaker
Product Characteristics
The product adopts gas insulation, and can be equipped with circuit breakers, load switches, combined electrical appliances and other primary programs.
Based on the latest distribution automation standards for the first and second fusion design, it integrates DTU, intelligent sensing, online detection and other intelligent components suitable for various distribution automation system applications.
- Industrial grade design, severity level reaches outdoor level IV
- Good electromagnetic compatibility design, internal test meets IV requirements
- Convenient on-site installation, debugging, and low-cost remote maintenance
- Double Ethernet, 4 serial ports, supports optical fiber and wireless routing
- Supports GB101, GB104, CDT, MODBUS protocols
- Supports communication timing (≤ 5S, accuracy ≤ 2S/day)
- Supports national network communication data encryption (168)
- Controls 4, 6, or 8-way switchgear, isolation switch, and grounding brake
- Environmental temperature/humidity monitoring & harmonic analysis
- Short circuit overcurrent and single-phase grounding protection
- 80-point fault recording and fault message upload
- Supports electromagnetic or electronic transformer access
- Intelligent: Integrated distribution network automation intelligent terminal to achieve distribution network automation, feeder automation, and other intelligent functions.
- Integration: A two-time integration design that combines switch equipment and intelligent components for easy operation and maintenance.
- Miniaturization: Compact structure and easy operation, mainly equipped with gas insulated and solid insulated switchgear equipment.
- Diversification: Circuit breakers, load switches, and combined electrical appliances can be freely combined to meet different requirements.
Frequently Asked Questions (FAQ)
For a 4-way configuration, the box width is 3200mm, while the 6-channel configuration has a width of 4000mm. The overall depth is 1150mm. The height is ≤2300mm (non-metallic versions are ≤2500mm). Additionally, an independent space of no less than 600mm in width is reserved for DTU automation installation.
The metal outer box is treated with an anti-corrosion coating process that ensures uniform thickness and firm adhesion, preventing obvious rust spots for at least 20 years. The case also features anti-sticker properties and reflective warning signs designed to resist fading for 15 years.
It is designed for altitudes below 1000m, with operating temperatures ranging from a minimum of -25°C to a maximum of +40°C. The maximum daily temperature difference should not exceed 25K, and daily average relative humidity must be ≤95% (monthly average ≤90%).
The system features multiple communication ports including double Ethernet and 4 serial ports. It supports optical fiber and wireless routing communication, and is compatible with popular protocols such as GB101, GB104, CDT, and MODBUS, alongside national network communication data encryption.
Yes, it features an integrated distribution network automation intelligent terminal. This supports primary and secondary system fusion, enabling feeder automation, "three remote" functions, and online environmental monitoring.