Durable Corrosion-Resistant Ring Main Unit
Built for the toughest environments, this corrosion-resistant RMU is optimized for coastal, chemical, mining, and high-humidity applications. Enhanced protection against corrosion, dust, vibration, and environmental contamination ensures dependable, maintenance-friendly operation and long-term reliability, even in challenging unattended installations.
HXGN15-12 Durable Corrosion-Resistant Ring Main Unit
The HXGN15-12 is an AC high-voltage complete switchgear with a rated voltage of 12kV and a rated frequency of 50Hz. It is mainly used in three-phase AC ring networks, terminal distribution systems, and industrial electrical installations for power receiving, distribution, and protection. It is also suitable for installation in compact (prefabricated) substations.
This product complies with GB3906 “3–35kV AC Metal-Enclosed Switchgear”, GB/T11022 “Common Technical Requirements for High-Voltage Switchgear and Controlgear Standards”, IEC60298 “AC Metal-Enclosed Switchgear and Controlgear for Rated Voltages Above 1kV up to 52kV”, and IEC60694 “Common Specifications for High-Voltage Switchgear and Controlgear”. It is equipped with a complete “five-interlock” protection system.
Advantages & Features
High-Strength Corrosion-Resistant Cabinet Construction
The enclosure is manufactured from premium aluminum-zinc coated steel sheet and protected by a thickened epoxy electrostatic powder-coating process. The dense and uniform coating system has been validated through rigorous salt-spray testing, providing outstanding resistance to coastal salt mist, chemical vapors, humidity, and corrosive atmospheres. The cabinet maintains its structural integrity and appearance over long-term service without rusting, paint peeling, or deformation.Reinforced Pollution-Resistant Insulation System
Busbar supports, insulation partitions, and structural insulating components are manufactured from V-0 rated flame-retardant, aging-resistant insulation materials. The system offers excellent resistance to electrical arcing, contamination, and tracking, making it well suited for environments with high dust levels, elevated humidity, and corrosive pollutants. This significantly reduces the risk of insulation breakdown and flashover faults.Heavy-Duty Anti-Vibration Mechanical Structure
The switchgear incorporates a reinforced structural frame and a robust operating mechanism equipped with strengthened spring assemblies, stainless-steel locks, and heavy-duty hinges. Designed to withstand vibration and mechanical shock, it is particularly suitable for mining operations, industrial production facilities, and other applications subject to frequent vibration, ensuring smooth and reliable operation throughout its service life.Enhanced Dustproof and Sealed Protection Design
Optional sealed dustproof configurations and cable-sealing kits are available to further improve enclosure protection. Upgraded door sealing effectively prevents the ingress of dust, moisture, and contaminants, ensuring long-term cleanliness and reliable operation of switches, busbars, and secondary control components.
Technical Parameters
| Item | Unit | Load Switch | Combination Unit |
Rated Voltage | kV | 12 | 12 |
Rated Frequency | Hz | 50 | 50 |
Power Frequency Withstand Voltage (phase-to-phase, phase-to-earth / across open contacts) | kV | 42 / 48 | 42 / 48 |
Lightning Impulse Withstand Voltage | kV | 75 / 85 | 75 / 85 |
Rated Current | A | 630 | 125 |
Rated Short-Circuit Making Current (peak) | kA | 50 | — |
Rated Peak Withstand Current | kA | 50 | — |
Rated Short-Time Withstand Current | kA / s | 20 / 4 | — |
Rated Short-Circuit Breaking Current | kA | — | 31.5 |
Rated Transfer Current | kA | — | 31.5 |
Max. Fuse Current | A | — | 125 |
Circuit Resistance | μΩ | ≤300 | ≤300 (excluding fuse) |
Auxiliary & Control Circuit Insulation Test | V | 2000 | 2000 |
