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33kV-38kV Drop Out Fuse for Outdoor High Voltage Distribution Protection
Factory: We are a professional manufacturer providing OEM custom production services.
- Product Overview
- Technical Specifications
- Product Structure
- Applications
- Testing Capability
- Packaging & Customization
Product Overview
Wishpower 33kV-38kV drop out fuse is developed for outdoor distribution networks with voltage classes such as 33kV, 35kV, 36kV and 38kV. When overload or short-circuit current occurs, the fuse link melts and interrupts the fault current. After operation, the fuse tube drops down to provide a visible open point for line inspection and maintenance.
Key advantages include:
Suitable for outdoor high voltage distribution systems
It can be used for overhead lines, pole-mounted transformers, branch feeders, cable transitions and outdoor distribution equipment.Reliable insulation performance
Polymer housing and porcelain housing options are available to meet different insulation, anti-pollution and weather-resistant requirements.Visible fault isolation
After fuse operation, the fuse tube drops down and forms a clear disconnection point, making inspection easier.Easy installation and maintenance
The compact structure supports pole-mounted installation and convenient fuse tube replacement.Strong environmental adaptability
It is suitable for high temperature, humidity, pollution, coastal, sandy and long-term outdoor operating conditions.
Core Features
Reliable overload and short-circuit protection
The fuse operates when abnormal current occurs, helping prevent fault expansion in distribution networks.Visible open-point indication
The drop-out tube provides a clear visual indication after operation, improving maintenance safety and efficiency.Excellent outdoor weather resistance
The insulation structure offers good resistance to ultraviolet radiation, aging, moisture and pollution flashover.Compact structure and flexible installation
It is suitable for poles, crossarms, distribution transformer stations and outdoor line branches.Optional load break function
Standard protection type and load break type can be selected according to project requirements.Compatible with different fuse link ratings
Fuse links can be selected based on transformer capacity, feeder load and protection coordination requirements.
Product Structure
The 33kV-38kV drop out fuse usually consists of the following components:
Insulation support
Polymer composite insulation or porcelain insulation provides the main insulating and mechanical support.Upper contact assembly
It ensures stable contact with the upper end of the fuse tube and supports release during fuse operation.Lower contact assembly
It supports the lower end of the fuse tube and maintains stable electrical and mechanical connection.Fuse tube assembly
The fuse tube contains the fuse link and drops down after fault interruption.Fuse link
Different rated current options are selected according to line protection requirements.Mounting bracket
It is used for installation on poles, crossarms or outdoor distribution structures.Terminal connectors
They connect incoming and outgoing conductors with reliable electrical conductivity and mechanical strength.
Technical Specifications
| Parameter | Application Range |
|---|---|
| Product Name | 33kV-38kV Drop Out Fuse |
| Applicable Voltage | 33kV, 35kV, 36kV, 38kV distribution systems |
| Product Type | Drop out, expulsion, high voltage, outdoor, load break type optional |
| Insulation Housing | Polymer housing or porcelain housing available |
| Installation Method | Outdoor pole mounting, crossarm mounting, distribution line installation |
| Applicable System | Three-phase AC distribution system, overhead distribution network |
| Protected Equipment | Distribution transformer, overhead line, branch feeder, cable transition |
| Rated Current | Selected according to project requirements |
| Breaking Capacity | Selected according to grid short-circuit current level |
| Operating Environment | Outdoor, high humidity, polluted, coastal, sandy and high temperature areas |
| Operation Method | Automatic drop-out after fuse link operation, operated with insulated stick |
| Maintenance Method | Fuse tube replacement, contact inspection, insulator cleaning, terminal tightening |
Product Structure
Main Applications
The 33kV-38kV drop out fuse is widely used in the following industries and applications:
Distribution line protection: used for overload and short-circuit protection in medium and high voltage distribution lines.
Overhead line sectional protection: installed at branch points to isolate faulty sections.
Transformer protection: used on the high voltage side of pole-mounted distribution transformers.
Outdoor distribution systems: suitable for rural networks, urban peripheral distribution and industrial power supply systems.
Pole-mounted projects: suitable for installation on poles, crossarms and outdoor line structures.
Cable protection: used at cable transition points between overhead lines and underground cables.
Substation outgoing feeders: applicable to external feeders, branch lines and auxiliary distribution circuits.
Renewable energy projects: suitable for wind farms, solar power plants and outdoor step-up distribution lines.
Testing Capability
Wishpower can carry out relevant inspections and tests for 33kV-38kV drop out fuse according to project requirements to ensure reliable outdoor high voltage operation.
Power frequency withstand voltage test
Verifies insulation capability under rated voltage and overvoltage conditions.Lightning impulse withstand voltage test
Checks insulation reliability under lightning impulse conditions.Partial discharge test
Detects abnormal discharge risks inside the insulation structure.Mechanical strength test
Verifies the stability of brackets, contacts, fuse tubes and insulation supports.Temperature rise test
Checks the temperature rise performance of conductive parts under rated current.Interrupting performance test
Verifies fuse operation and drop-out reliability under fault current conditions.Pollution and weather resistance test
Evaluates performance under humidity, pollution, ultraviolet exposure and outdoor aging conditions.Appearance and dimension inspection
Checks product appearance, creepage distance, installation dimensions and assembly quality.
Packaging & Transportation
To keep products safe during transportation and storage, we use the following packaging methods:
- Individual Packaging: Each product is wrapped with protective film, packed in a high-strength carton, and cushioned with buffer materials.
- Pallet Packaging: Multiple products are fixed on wooden pallets and wrapped with stretch film, suitable for container shipping.
- Export Packaging: Fumigated wooden cases, moisture-proof treatment, and detailed packing lists are provided according to sea freight requirements.
Customization Service
WishPower can provide the following customization options according to customer requirements:
- Structural Dimensions: Adjust overall height, creepage distance, shed quantity, and shed diameter.
- End Fittings: Customize ball-socket, tongue-clevis, eye, or other interface types according to connection requirements.
- Color: Standard gray, with red, yellow, blue, and other colors available subject to MOQ.
- Special Environments: Formulations for extreme cold (-60 C), strong UV exposure, heavy pollution, and other harsh conditions.
- Voltage Classes: Full-range customization from 10kV to 1000kV.
- Marking: Customer logos or model numbers can be molded or printed on the product.
For specific customization requirements, please contact our sales engineers. We will provide a technical solution within 24 hours.
FAQ
Q: Can you supply complete products for transmission and distribution projects?
A: Yes. We can provide composite insulators, surge arresters, fuse cutouts, insulating bushings and related power insulation products.
Q: What information should I provide for a quotation?
A: Please provide voltage level, product type, quantity, application environment, standard, drawings or technical specifications if available.
Q: Can you provide customized insulation products?
A: Yes. WishPower supports customized voltage ratings, creepage distances, fittings, colors and drawings according to project requirements.
Q: What standards can your products meet?
A: Our products can be designed and tested according to IEC, ANSI, GB and customer-specific technical requirements.
Q: Are composite insulators suitable for coastal areas?
A: Yes. Composite insulators with silicone rubber housing provide good hydrophobicity and anti-pollution performance, making them suitable for coastal and polluted environments.
