24kV SF6-Free Environmental-Friendly Gas Insulated Ring Main Switchgear (RMU)

Core Product Features of Gas Insulated Ring Main Switchgear

1. Advanced Safe Interlocking & Visibility

Dual Isolation Breakouts: The integrated switch features distinct and visible “double” isolation breakouts to ensure ultimate operator safety during maintenance.

Modular “Five-Prevention” Interlock: Truly prevents misoperation. The lower compartment door features an emergency unlocking device and can only be opened when the main circuit is fully grounded. Conversely, the grounding switch can only be tripped and the switch closed after the lower door is secured.

2. Miniaturized & Highly Flexible Design

Compact Footprint: Due to the optimized space configuration of the inner vacuum LBS, the standard air box width can be compressed down to 450mm–500mm.

Customization Evaluation: While the standard phase pitch supports compact layouts, the structural dimensions, scheme layout, and expansion options (top or side expansion) can be tailored to specific project blueprints.

High Versatility: The upper and lower isolation schemes share a component utilization rate of over 90%, ensuring high product stability and strong versatility for stock management.

Operating Environment

1. Ambient Air Temperature: Upper limit +40℃, lower limit -50°C.
2. Relative Air Humidity: Daily average ≤ 95%, monthly average ≤ 90%.
3. Altitude: Standard design up to 1500 meters. Special structural adjustments for the air box are available for high-altitude installations at 2000 meters or above upon request.
4. Earthquake Resistance: Intensity does not exceed level 8.
5. Site Conditions: Applicable for locations free from fire, explosion, severe contamination,
chemical corrosion, and violent vibrations.

Technical Specifications of Environmental-Friendly Gas Insulated Ring Main Switchgear

According to International Standards

The product design, manufacturing, and type testing strictly comply with the following standards:

GB/T 11022 / IEC 62271-1: Common technical requirements for high-voltage switchgear and controlgear standards.

GB/T 3906 / IEC 62271-200: AC metal-enclosed switchgear and control equipment.

GB/T 3804 / IEC 62271-103: High-voltage AC load switches.

GB/T 1985 / IEC 62271-102: High-voltage AC disconnect switches and grounding switches.

Ordering Instructions

When placing an order or requesting a technical evaluation, please provide the following information:

1. Main circuit diagram, panel arrangement diagram, and floor plan layout.

2. Secondary circuit schematic diagram of the switchgear cabinet.

3.Specific isolation configuration requirement (Upper Isolation or Lower Isolation scheme).

4. Expansion requirements for the air box tank (Top Expansion or Side Expansion option).

5. Any special or harsh environmental operation conditions (e.g., high altitude above 2000m).