Product Description

Reliable secondary distribution is the absolute backbone of any stable industrial grid, and choosing a robust switchgear is critical to preventing costly downtime and protecting expensive machinery. Our MV/HV Ring Main Switchgear (RMU) is engineered with a focus on safety, compact footprints, and high electrical endurance, making it a globally trusted choice for power distribution. For over a decade, our factory has supplied this reliable MV/HV Ring Main Switchgear (RMU) to commercial developments, manufacturing hubs, and utilities worldwide, maintaining an outstanding record of uninterrupted operation under heavy load conditions.

Utilizing a highly reliable SF6 load break switch housed within a robust, air-insulated metal enclosure, our MV/HV Ring Main Switchgear (RMU) features a mechanical 3-position ("Close-Open-Earth") switch for simplified, safe operations. It is fully integrated with a rigorous "five-prevention" safety interlocking system, eliminating the risk of human operational error. This makes our switchgear extremely popular among global panel builders and EPC contractors who demand uncompromising safety, long-term durability, and cost-effective performance.

Specifications

Rated Voltage	12 kV
Rated Current	630 A
Rated Frequency	50Hz / 60Hz
Short-Time Withstand Current	20 kA / 25 kA for 4 seconds
Internal Arc Classification	IAC AFLR 20kA/1s (High operator safety against internal arcs)
Safety Interlocking	Integrated mechanical "Five-Prevention" interlock system

Applications

Industrial Manufacturing Plants: Central distribution switchgear for automobile factories, textile mills, and assembly plants.

Mining Power Supply: Compact and rugged switchgear for above-ground mining facilities and processing stations.

High-Rise Buildings: Safe and space-saving primary power distribution in basement or rooftop utility rooms.

Packaged Substations: Serves as the primary high-voltage component inside prefabricated box-type substations.

Customization & Factory Strength

Our factory features a complete, modern assembly line and a certified testing center. We offer flexible customization for the MV/HV Ring Main Switchgear (RMU), including a custom choice of incoming/outgoing modules, customized current transformer ratios, auxiliary switch combinations, and integrated digital meters. Every switchgear unit undergoes strict mechanical testing and high-voltage dielectric insulation tests in compliance with IEC 62271-200 before being approved for shipping.

Packaging & Shipping

Packaging: Placed vertically on robust wooden pallets, wrapped in anti-static thick bubble wrap, and secured inside export-grade wooden crates.

Shipping: Stretched-wrapped on robust fumigated wooden pallets and reinforced with plastic corner protectors and heavy-duty strapping.

FAQ

Q1: What is the 'five-prevention' safety interlock system?

A1:

The five-prevention safety interlock is a mandatory safety standard designed to prevent the most common and dangerous operator errors:

1. Prevents opening/closing the main switch under load.

2. Prevents accidental entry into live compartments.

3. Prevents misoperation of the main switch.

4. Prevents earthing of live conductors.

5. Prevents closing the grounding switch in energized conditions.

Q2: Can we integrate protection relays from third-party brands into this switchgear?

A2: Yes. We can customize the low-voltage auxiliary compartment of our MV/HV Ring Main Switchgear (RMU) to house, wire, and integrate protective relays, power meters, or smart controllers from major third-party brands (such as Schneider, ABB, Siemens, etc.) based on your project specification.