40.5kV Motorized Drop-out Fuse

The HUAJIDIAN 40.5kV Motorized Drop-out Fuse is an intelligent upgrade of the traditional outdoor rolling-out fuse, specifically developed for outdoor high-voltage power distribution systems. Unlike traditional products that rely on manual on-site operation, this product incorporates an electric actuator, enabling fully automatic opening and closing. The device uses a gravity-drop principle; after a faulty fuse blows, the fuse tube automatically falls due to gravity, creating a clearly visible break for easy inspection and maintenance.

Leveraging years of experience in power equipment R&D and manufacturing, HUAJIDIAN has optimized the insulation structure, mechanical stability, and environmental adaptability of its products, completely resolving issues such as high operational risks, slow fault response, and poor weather resistance of traditional fuses. These fuses are essential core equipment for the intelligent upgrading of modern power distribution networks.

Structural representation

Type introduction

Core Performance and Specifications

1. High-Performance Protection Parameters

- Rated Voltage: 40.5kV

- Rated Current: 200A

- Rated Breaking Current: 16kA

- Minimum Creepage Distance: 1255mm These parameters ensure accurate response to line overcurrent and short-circuit faults, effectively preventing equipment burnout and line tripping, and guaranteeing the safe and stable operation of the power grid.

2. Intelligent Electric Operating System

- Motor Operating Voltage: 12V/24V DC, wide voltage adaptability and strong compatibility

- Operation Method: Equipped with electric push rod and electric release hook, supporting remote control and automatic fault response

- Core Advantage: No manual operation required on-site, achieving unmanned fault handling and significantly improving power distribution network operation efficiency

3. Optimized Structural Design

The insulation layer uses high-quality rubber insulated supports and integrated insulated push rods, with high insulation strength and aging resistance, effectively eliminating the risk of leakage and flashover. The mechanical structure is equipped with a precision rocker arm and a dedicated motor protective cover, providing comprehensive protection for internal core components, resisting external impacts and dust corrosion, and ensuring long-term stable operation of the equipment.

4. Excellent Environmental Adaptability

- Operating Temperature: -30℃~45℃, suitable for extremely cold and high-temperature outdoor scenarios

- Applicable Altitude: 1000m and below

- Icing Capacity: Can withstand a maximum radial icing thickness of 6mm, stable operation in winter icing weather

Main Application Scenarios

With its advantages of intelligent operation, stable protection, and strong weather resistance, the HUAJIDIAN 40.5kV Motorized Drop-out Fuse is widely used in various outdoor high-voltage power distribution scenarios:

1. Overcurrent and short-circuit protection for 40.5kV outdoor feeders in urban and rural power distribution networks

2. Main or backup protection equipment for outdoor power distribution units in substations

3. Line safety protection for large photovoltaic power stations and wind farm collection systems

4. Core supporting equipment for distribution network automation systems requiring remote automatic switching

Engineering Application Case

Case: Distribution Network Protection Project for a Wind Farm in Northwest China

A large onshore wind farm in Xinjiang faces harsh outdoor conditions, with strong winds year-round, large temperature differences between day and night, and a high risk of icing in winter. Traditional manual fuses were difficult to operate, had slow fault response, and were prone to accidental activation due to icing. This project adopted 86 sets of HUAJIDIAN 40.5kV Motorized Drop-out Fuse, which, thanks to its -30℃ low-temperature tolerance and 6mm anti-icing performance, are perfectly suited to the harsh local climate. The remote electric tripping function completely eliminates the safety hazards of high-altitude operations in extreme weather, reduces maintenance frequency by 70%, and improves the power supply reliability of the wind farm's collection system by over 95%.

Brand and Factory Strength

HUAJIDIAN is a professional manufacturer of high-voltage power equipment located in Zhejiang Province, specializing in the R&D, production, and sales of outdoor high-voltage protection equipment. The company is equipped with complete production lines, standardized testing laboratories, and full industry qualifications, enabling one-stop service from R&D and precision production to quality inspection and after-sales support.

The brand always adheres to a quality-first business philosophy, strictly implementing national and industry standards throughout the entire process, and all products undergo professional performance testing. We have long-term partnerships with major power grids and new energy power plants across China, providing safe, high-quality, and cost-effective power equipment solutions to global customers, earning widespread market recognition and industry reputation.

FAQ

Q1: What are the core advantages of HUAJIDIAN's motorized drop-out fuse compared to traditional manual fuses?

Traditional fuses rely on manual on-site operation, posing risks such as high-altitude work and slow fault handling. HUAJIDIAN's 40.5kV motorized model features an intelligent electric operating system, supporting 12V/24V DC remote control and automatic fault response, eliminating the need for on-site operation and significantly improving maintenance safety and fault handling efficiency. Simultaneously, the equipment is resistant to low temperatures, anti-icing, and has stronger insulation stability, resulting in a longer service life and lower maintenance costs, adapting to the needs of modern unmanned and intelligent power distribution network development.

Q2: What working environments is this 40.5kV Motorized Drop-out Fuse suitable for?

This product is specifically developed for outdoor high-voltage power distribution scenarios. It can operate stably in a temperature range of -30℃ to 45℃, is suitable for altitudes of 1000m and below, and can withstand a maximum radial icing of 6mm. It is widely applicable to wind farms, photovoltaic power stations, urban and rural outdoor power distribution lines, substation outdoor protection, and other scenarios, and can easily handle various harsh outdoor conditions such as high temperatures, extreme cold, icing, and dust.

Q3: Is the product's electrical control system compatible with conventional power distribution network automation equipment?

Excellent compatibility. The product adopts the industry-leading 12V/24V DC wide-voltage motor drive design, which is compatible with most conventional power distribution network automation control systems and remote monitoring equipment on the market. The standard electric actuator and release hook interface specifications eliminate the need for complex modification and adaptation during installation. It can quickly achieve remote opening and closing and fault linkage protection, making installation convenient and operation stable.