LW58-12 Outdoor SF6 Pole-Mounted Circuit Breaker

Reliable SF6 Insulation for Overhead Distribution Networks

The LW58-12 SF6 pole-mounted circuit breaker is designed for overhead line protection in 12kV medium-voltage power systems. It features a sealed SF6 insulated chamber for arc-extinguishing, delivering stable performance even in high humidity, coastal, or mountainous environments. This breaker is especially suited for power grids requiring fast reclosing, minimal maintenance, and dependable fault isolation.

Key Features

Rated Voltage: 12kV
Rated Current: 630A / 1250A
Breaking Current: 20kA
Insulation Medium: SF6 gas sealed enclosure
Pole-Mounted Design: Compact and weather-resistant for direct installation on overhead structures
Manual or Motorized Operation: Supports both local and remote control
Low Maintenance: SF6 chamber eliminates the need for frequent checks
Fast Fault Isolation: Instant arc extinction enhances grid stability

Application Scenarios

Rural and urban distribution feeders
Renewable energy output connections (solar/wind)
Pole-mounted grid automation and sectionalizing
Backup switching for substations and tap lines

Example: In Texas, USA, the LW58-12 was used to replace aging oil-filled switches along a 13.2kV rural feeder. After deployment, the average fault clearing time dropped by 45%, and maintenance intervals extended from 6 months to over 2 years (Source: GridModern Solutions LLC, 2023 Field Report).

Compliance Standards

IEC 62271-100
GB 1984-2014
IEEE C37.60 (for remote-controlled variants)

Technical Parameters

Parameter	Value
Rated Voltage	12kV
Rated Current	630A / 1250A
Rated Short-Circuit Current	20kA
Rated Frequency	50/60Hz
Rated Short-Time Current	20kA / 4s
Rated Peak Withstand Current	50kA
Closing Time	≤ 60 ms
Mechanical Life	≥ 10,000 ops

Real Customer Reviews

★★★★★ “We chose the LW58-12 for our wind farm interconnection. It's compact, fast-acting, and practically maintenance-free.”
— Martin O., Electrical Engineer, Norway Grid Service

★★★★★ “Excellent breaker for harsh weather. Our coastal feeders in New Zealand saw a 70% reduction in outage-related complaints.”
— Janet T., Asset Manager, SouthPower NZ

★★★★★ “We’ve standardized this model across 12 substations in Arizona. SF6 insulation works flawlessly under thermal extremes.”
— Dave M., Operations Director, SW Utility Group

★★★★☆ “One of the most robust breakers we’ve deployed on poles. Installation was quick and easy.”
— Eric B., Contractor, British Power Engineers Ltd.

★★★★★ “Remote control capability is a huge bonus for our automation team. Instant feedback and fault clearance.”
— Liam H., Automation Lead, Midwest Power Systems

Why Choose Weisho LW58-12?

With proven field performance and compliance with international standards, the LW58-12 offers a smart upgrade to your grid infrastructure. Its modular design, durability, and excellent insulation make it an ideal fit for cost-conscious utilities and EPC contractors.

📞 Need technical support or a customized quote?
Contact Thor, Electrical Engineer at Wei Shoe Elec: