12KV SF6 load break switch
| Brand | ROCKWILL |
| Model NO. | 12KV SF6 load break switch |
| Rated voltage | 12kV |
| Series | RLS |
Product Overview：
The Rockwill RLS-12/17.5 is a compact, SF6 gas-insulated load break switch designed for indoor medium-voltage applications at 12kV and 17.5kV ratings. This high-performance switchgear utilizes SF6 gas for effective arc quenching and insulation, featuring a three-position switching mechanism (make-break-ground) in a space-saving design that ensures easy installation and reliable operation in various environments. The standard RLS-12/17.5 model and its fused combination variant (RLS-12/17.5D) provide comprehensive protection and control for power distribution networks, particularly suitable for ring main units, cable branch cabinets, and distribution substations.
Key Features:
Three-position switching mechanism (ON-OFF-GROUND)
SF6 gas insulation for superior arc extinction
Compact and lightweight design
Optional fused combination (RLS-12/17.5D)
Compliant with GB3804, IEC60256-1, GB16926, IEC60420 standards
Product Advantages:
Enhanced electrical safety with SF6 gas insulation
Reduced maintenance requirements
Space-efficient design for compact installations
Reliable operation in demanding conditions
Flexible configuration options (with or without fuse)
Application Scenarios:
Ring main unit (RMU) applications
Cable distribution networks
Compact substation installations
Industrial power distribution systems
Building power supply systems
Environmental Specifications:
Operating temperature range: -5°C to +40°C
Humidity tolerance: 90% daily average, 95% monthly average
Maximum installation altitude: 2500m above sea level
Suitable for non-corrosive environments
Vibration-resistant construction
Technical data
-
Design Solution of 24kV Dry Air Insulated Ring Main UnitThe combination of Solid Insulation Assist + Dry Air Insulation represents the development direction for 24kV RMUs. By balancing insulation requirements with compactness and employing solid auxiliary insulation, insulation tests can be passed without significantly increasing phase-to-phase and phase-to-ground dimensions. Encapsulating the pole column solidifies the insulation for the vacuum interrupter and its connecting conductors.Maintaining the 24kV outgoing busbar phase spacing at 110mm,16/08-2025 -
Optimization Design Scheme for the 12kV Air-Insulated Ring Main Unit Isolating Gap to Reduce Breakdown Discharge ProbabilityWith the rapid development of the power industry, the ecological concept of low-carbon, energy-saving, and environmental protection has been deeply integrated into the design and manufacturing of power supply and distribution electrical products. The Ring Main Unit (RMU) is a key electrical device in distribution networks. Safety, environmental protection, operational reliability, energy efficiency, and economy are inevitable trends in its development. Traditional RMUs are primarily represented16/08-2025 -
Analysis of Common Problems in 10kV Gas-Insulated Ring Main Units (RMUs)Introduction:10kV gas-insulated RMUs are widely used due to their numerous advantages, such as being fully enclosed, possessing high insulation performance, requiring no maintenance, having a compact size, and offering flexible and convenient installation. At this stage, they have gradually become a critical node in urban distribution network ring-main power supply and play a significant role in the power distribution system. Problems within gas-insulated RMUs can severely impact the entire di16/08-2025 -
SF6-Free Solution for Air-Insulated/Eco-friendly Gas Ring Main UnitsⅠ. Technical Bottlenecks of SF₆ SubstitutionInsulation Medium Performance Gapo Dried Air/N₂ insulation strength is only 1/3 of SF₆, requiring expansion of contact gap from 60mm to ≥150mm.o Conventional spring mechanisms lack energy to drive rapid closure of large gaps, easily causing contact ablation due to pre-strike.o Synthetic gases (e.g., C4+CO₂) decompose under arcing, leading to irreversible insulation degradation.Mechanical Structural Limitationso National Grid standardization fix16/08-2025 -
Implementation Scheme for Installing Lightning Arresters or Voltage Transformers in Gas-Insulated Ring Main UnitsAccording to insulation type, ring main units (RMUs) can be categorized as gas-insulated or air-insulated. The former installs primary circuit components in a sealed metal enclosure filled with low-pressure gas (primarily SF₆ or mixed gases) as the insulating medium, using cable terminals for incoming and outgoing lines. Due to superior insulation, compact size, and modular design, they are widely used in 10kV outdoor distribution substations and prefabricated transformer stations. However, thei16/08-2025 -
Pressure Relief Safety Solution for Gas-Insulated Ring Main UnitsⅠ. Problem ContextAs a core component in urban power distribution networks, ring main units (RMUs) are widely used in residential areas, factories, and public buildings due to their compact structure, low cost, and high reliability. However, internal equipment failures or arc faults may generate high-temperature, high-pressure gas, leading to cabinet explosions that endanger personnel and equipment. While traditional sealed designs maintain insulation integrity, they fail to rapidly release sud16/08-2025
