Products Description
What is Automatic Ring Main Unit?
An automatic ring main unit (RMU) is a medium-voltage power distribution equipment designed to provide reliable power supply for ring network systems. It integrates switching, protection, monitoring and remote control functions in a compact box. Unlike traditional ring main unit, automatic ring main unit can cooperate with intelligent control and communication systems to monitor operating status in real time and respond to faults more quickly. When a certain part of the distribution network fails, the system can isolate the affected area while ensuring that the non-fault area continues to supply power. This helps reduce unnecessary power outages and simplify power distribution management.
Established
years experience
Employees
Partners
Our advantages
Fully insulated and sealed structure
The main high-voltage components are encapsulated and protected by a fully insulated structure.Busbars and switch components use solid insulating materials to improve electrical safety performance and environmental tolerance. The cable connection system adopts fully insulated and fully shielded detachable connectors. The main circuit has a high level of protection to ensure that the internal components are protected from dust, moisture and condensation in harsh installation environments.
Modular configuration
Different electrical functions can be combined according to project requirements. Optional functional units include： Load switch unit Load switch-fuse combination unit Circuit breaker unit Busbar segmented unit Metering unit Voltage transformer (PT) unit.
This modular design enables the automatic ring main unit to be flexibly configured to meet various needs such as incoming, outgoing, transformer protection and metering.
Airless insulation option
For application scenarios where gas-insulated equipment is not suitable, solid-insulated and airless configurations can be used, thereby eliminating the need for SF6 gas management and daily gas monitoring. The design eliminates the hidden dangers related to gas leakage, and is especially suitable for indoor and urban power distribution applications with high environmental protection requirements.
Reliable mechanical interlocking
The ring network cabinet is provided with a mechanical interlocking device between the main switch operation and the grounding operation. The interlocking system helps to prevent incorrect operation sequence, thereby ensuring the safety of operators during switching and maintenance. Clear operating position instructions and practical front panel layout also provide convenience for the daily operations of maintenance personnel.
Intelligent monitoring and remote control
The automatic ring main unit (RMU) can integrate intelligent control and communication systems to realize remote monitoring and operation. According to the project configuration, users can monitor equipment status, operating parameters and fault information through the remote control system. This is particularly important for distribution networks that need to reduce manual inspections and improve fault response speed.
Automatic ring main unit suitable for various power distribution projects
The appropriate ring main unit should be selected according to the system voltage, rated current, short-circuit tolerance requirements, protection plan and installation environment. Tianjin Kechang International Trade Co., Ltd. provides medium voltage automatic ring main unit (RMUs) and switchgear for international power distribution projects. We can provide customized configurations, technical drawings, test files, and technical support based on specific projects. Whether the application scenario is a public distribution network, an industrial facility, a commercial building, or a renewable energy project, our engineering team can help you match the most suitable ring main unit configuration according to your actual electrical needs.
| Project | Unit | XGNGZXD2-12C | XGNGZXD2-12/F | XGNGZXD2-12/V | |
| Rated Voltage | kV | 12 | 12 | 12 | |
| Rated Frequency | Hz | 50 | 50 | 50 | |
| Rated Current | A | 630 | Depend on Current Rating of the Fuse | 630 | |
| Rated Insulation Level | Rated Power-frequency Withstand Volatage (between Phases, to Earth) | kV | 42 | 42 | 42 |
| Rated Power-frequency Withstand Voltage (Across the Isolating Distance) | 48 | 48 | 48 | ||
| Rated Power-frequency Withstand Voltage (Control and Auxiliary Circuit) | 2 | 2 | 2 | ||
| Rated Lightning Impulse (between Phases, to Earth) | 75 | 75 | 75 | ||
| Rated Lightning Impulse (Across the Isolating Diatance) | 85 | 85 | 85 | ||
| Rated Short-time Making Current | kA | 50 | Limited by High Voltage Fuse | 50 | |
| Rated Short-time Breaking Current | kA | - | Limited by High Voltage Fuse | 20 | |
| Mechar Vcal Life | Load Switch/Circuit Breaker | Times | 10000 | 10000 | 10000 |
| Disconnector/Earthing Switch | 3000 | 3000 | 3000 | ||
| Resistance of Main Circuit | μΩ | ≤120 | - | ≤120 | |
Hot Tags: automatic ring main unit, China automatic ring main unit manufacturers, suppliers, factory, hv rmu, Environmentally Friendly Gas Insulated Ring Main Unit, 3 phase ring main, Outdoor Ring Main Unit, 13 8 kv ring main unit, 33kv ring main unit
