power distribution solution
The Outdoor Ring Main Unit (RMU) / Feeder Pillar is primarily composed of SF6 gas-insulated ring main units and a metal enclosure. All live parts are sealed within stainless steel compartments insulated by SF6 gas. The units are arranged and combined based on user requirements, such as incoming line units, outgoing line units, tie-in units, and PT (power supply) units. It can be equipped with a power distribution automation system, offering simple installation, good ventilation, security, aesthetic appeal, environmental friendliness, immunity to environmental influences, and elimination of condensation issues.
It achieves the integration of primary and secondary systems in urban distribution networks and modular assembly, shortening the construction cycle and significantly improving the reliability of urban power grid operation.
Overall, the most prominent features of this feeder pillar are its very limited space requirement, highly flexible configuration according to specific needs, and lower overall project and procurement costs compared to traditional feeder pillars.
The Ring Main Unit (Feeder Pillar) is a new generation of modular, multi-functional, highly reliable, compact, and maintenance-free ring main switchgear. In outdoor power distribution, it is suitable for ring main or dual radial power supply in 10~35kV power supply lines, and can also be used for terminal power supply, providing power control and protection for the supplied premises.
The Intelligent Ring Main Unit (Feeder Pillar) can be equipped with a distribution automation system. By simply configuring a distribution automation terminal unit and communication device within the RMU, it can communicate with the control center, measure various electrical parameters like line voltage and current, and monitor the status of each switch.
Features
2.2 Unaffected by environmental conditions; resistant to condensation, frost, salt spray, pollution, corrosion, UV rays, small animals, and chemicals; suitable for use in harsh environments.
2.3 Uses silicone rubber connectors to enable the plug-and-play connection of high-voltage components and arbitrary expansion of the enclosure.
2.4 Fully shielded cable entry and exit.
2.5 Can be equipped with vacuum circuit breaker modules.
2.6 Can be equipped with high-voltage monitoring components and integrated digital relays.
2.7 Can be equipped with high-voltage metering modules.
2.8 Can be fitted with remote control and monitoring units.
2.9 Can be equipped with overcurrent relay protection devices.
2.10 Strong flood resistance, long service life, maintenance-free, reducing operating costs.
2.11 Meets the upgrade requirements for distribution automation.
Normal Service Conditions
3.1 Ambient Temperature: -35°C to +40°C
3.2 Relative Humidity: Daily average ≤ 95%, Monthly average ≤ 90%
3.3 Seismic Resistance: 8 degrees, horizontal acceleration ≤ 4 m/s², vertical acceleration ≤ 0.2 m/s²
3.4 Altitude: Not exceeding 3000m
3.5 Location: Free from fire, explosion hazards, and severe vibration.
