Load Break Porcelain Motorized Drop-out Fuse

The HUAJIDIAN Load Break Porcelain Motorized Drop-out Fuse is an upgraded protection device adapted to modern distribution networks. It overcomes the material and structural shortcomings of traditional porcelain fuses, replacing traditional porcelain insulation components with high-performance composite silicone rubber insulators. The core arc-extinguishing structure and mechanical transmission structure have been comprehensively optimized and upgraded to meet the distribution protection needs under complex operating conditions.

The product is equipped with a high-purity copper-silver alloy fuse core, providing precise and stable fusing characteristics and rapid response to line overload and short-circuit faults. Featuring a built-in gas-generating high-efficiency arc-extinguishing structure and optimized air duct design, this product rapidly extinguishes the interrupting arc, prevents arc reignition, and ensures a safe and reliable interruption process. It can meet the needs of distribution network protection scenarios with different fault current levels.

Core Product Features

1. Lightweight Design, Convenient Installation and Maintenance

Compared to traditional porcelain fuses, this product is approximately 30% lighter, significantly reducing the load on towers and avoiding equipment damage and tower deformation during transportation, hoisting, and installation. Its streamlined and lightweight structure simplifies on-site handling and pole installation, effectively reducing construction difficulty and improving project installation efficiency.

2. Corrosion-Resistant and Durable, Stable Mechanical Performance

The core mechanical components of the Load Break Porcelain Motorized Drop-out Fuse are made of stainless steel with hot-dip galvanizing for excellent rust and corrosion resistance. The mechanical transmission operates smoothly without jamming, and it can withstand long-term outdoor exposure to wind, sun, and rain without rusting, jamming, or structural failure. Its mechanical operating life can reach over 2000 cycles, ensuring stable long-term operation and eliminating the need for frequent replacements.

3. Prevents Misoperation and Reduces Post-Operation Maintenance Costs

The equipment is equipped with a dedicated misoperation prevention structure, effectively avoiding accidental disconnection and connection caused by human error or external vibration, ensuring the safety of personnel and equipment. The composite silicone rubber insulator has a smooth surface with no dead corners for dirt accumulation, making it difficult for dust, salt, and chemical residues to adhere, simplifying daily cleaning and maintenance, and significantly reducing the post-operation maintenance costs for power grid companies.

4. All-Terrain Weather Resistance and Excellent Environmental Adaptability

The Load Break Porcelain Motorized Drop-out Fuse has undergone rigorous high and low temperature cycling, damp heat aging, and salt spray aging tests, enabling stable operation in an ultra-wide temperature range of -40℃ to +70℃, adapting to extreme weather conditions such as high temperatures in summer and low temperatures in winter. The equipment achieves a Level 4 anti-pollution rating, resisting coastal salt spray corrosion and chemical pollution in industrial parks, significantly reducing the probability of flashover failures in extreme environments.

Key Technical Parameters

Core Application Scenarios

1. High-Pollution, Coastal Industrial Parks

Leveraging the excellent hydrophobicity, flashover resistance, and salt spray resistance of composite silicone rubber materials, the product effectively resists chemical corrosion and coastal salt spray erosion, eliminating common flashover and insulation breakdown faults found in traditional porcelain fuses. It is suitable for the long-term stable operation of lines and transformers in high-pollution environments.

2. High-Altitude, Low-Voltage Areas

The Load Break Porcelain Motorized Drop-out Fuse boasts excellent insulation performance and strong low-voltage adaptability. It requires no additional insulation modifications for use in high-altitude, low-voltage environments, fully meeting high-altitude power grid line protection standards and addressing the pain point of insufficient insulation margin in traditional fuses at high altitudes.

3. Distribution Network Branches and Terminal Lines

Suitable for the protection of urban and rural distribution network branches and terminal lines. When overload or short-circuit faults occur, it can quickly isolate the faulty section, preventing the fault from spreading to the main line, reducing the power outage area, and effectively improving the overall power supply reliability of the distribution network.

4. 10kV Distribution Transformer Primary Side Protection

As the core protection equipment for the primary side of a 10kV pole-mounted transformer, it can quickly cut off transformer overload and short-circuit faults, protect equipment safety, reduce fault losses, and shorten power outage recovery time.

Product Advantages Comparison

Actual Engineering Application Case

1. Project Background

A 10kV distribution network in a coastal chemical industrial park in East China. The area has high salt spray concentration, severe chemical pollution, and a humid climate. The park's original traditional porcelain drop-out fuses had been in operation for a long time, frequently experiencing flashover, insulation aging, and porcelain body damage, with an average of 6-8 faults per year, frequently causing line outages, affecting the power supply to enterprises, and significantly increasing the pressure on power grid operation and maintenance.

2. Project Solution

In 2024, the park carried out power grid upgrades and renovations, replacing all traditional fuses with HUAJIDIAN electrically operated drop-out porcelain fuses. Considering the park's high load and high pollution conditions, a 12.5kA high breaking current, level 4 anti-pollution model was customized and selected to match the harsh operating environment.

3. Operational Results

Over a year after its commissioning, the equipment has successfully withstood extreme conditions such as typhoons, high temperatures and humidity, and salt spray corrosion, without experiencing flashover, corrosion jamming, or equipment damage. The power distribution network failure rate in the industrial park has decreased by 95%, and the frequency of manual cleaning and maintenance has decreased by 70%. The lightweight design of the product significantly reduces the difficulty of inspection and replacement, ensuring a continuous and stable power supply for industrial production in the park, creating significant economic and operational benefits for the project.

FAQ

Q1: In which scenarios is the Level 4 anti-pollution model of this product suitable?

A1: The HUAJIDIAN Level 4 anti-pollution drop-out fuse is specifically developed for harsh pollution conditions. It is suitable for highly polluted scenarios such as coastal areas with severe salt spray corrosion, chemical industrial parks with corrosive gas emissions, and mining areas with severe dust pollution. It can effectively resist external pollution corrosion, avoid flashover failures, and maintain stable insulation performance over a long period, far exceeding the environmental adaptability of traditional ordinary porcelain fuses.

Q2: Can the Load Break Porcelain Motorized Drop-out Fuse be customized according to transformer capacity and project requirements?

A2: Comprehensive customization services are supported. The rated current of the product's fuse element can be customized from 6A to 200A to suit different specifications of 10kV distribution transformers. It also offers 6.3kA and 12.5kA short-circuit breaking current options, and structural parameters such as the drop-out angle can be adjusted according to on-site engineering conditions to meet the personalized construction and operation needs of various distribution network projects.

Q3: What is the service life and maintenance cycle of the composite insulated fuse?

A3: The product has excellent anti-aging and weather resistance, with a mechanical operating life exceeding 2000 cycles and an outdoor natural service life of over 10 years. Thanks to the smooth, non-fouling properties of the composite silicone rubber, the equipment maintenance cycle is significantly extended. Routine maintenance only requires simple quarterly dust removal checks and annual professional performance testing, eliminating the need for frequent cleaning and replacement, significantly reducing long-term power grid maintenance costs.