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The 24kV outdoor expulsion drop-out type loadbreak fuse cutout serves as short-circuit protection equipment for 10kV to 38kV distribution line branch lines and distribution transformers. This device integrates protection functions with load switching capabilities, suitable for overhead distribution systems and distribution transformer primary side installations. The arc chute assembly enables load interruption operations, expanding the operational flexibility of distribution protection systems. Rated current ranges from 100A to 200A, supporting various commercial procurement specifications.
Two insulator material options are available for different environmental conditions. For porcelain insulators, the porcelain body connects to hardware fittings through cement pouring using Por-rok anchoring cement manufactured by CGM INC USA. This cement formulation features rapid solidification properties, mechanical strength characteristics, and low expansion coefficient performance. For polymer insulators, hardware fittings crimp onto fiberglass rods, with housing and sheds manufactured from high-temperature vulcanized silicone rubber through one-piece injection molding. This construction provides sealing performance and tracking and erosion resistance properties. All ferrous components undergo hot-dip galvanizing treatment with zinc coating thickness exceeding 86μm for corrosion resistance in outdoor environments.
This fuse cutout incorporates a single vent design configuration. During fault interruption operations, exhaust directs downward and outward. This directional exhaust prevents rainwater intrusion into the fuse body, avoids upper line damage from expelled gases, and contributes to interruption capacity performance.
All copper casting components use bronze or brass material formulations. Contact surfaces receive silver plating treatment with convex surface geometry, which reduces contact resistance values. High-strength memory copper alloy sheets maintain consistent contact pressure during normal operation and fuse dropout events. An arc-shortening copper rod installation supports interruption capacity during short-circuit fault conditions.
The arc chamber for loadbreak operations uses reinforced nylon material construction. This material provides mechanical strength properties, aging resistance characteristics, and flame retardant performance. The arc chamber design supports installation in high ultraviolet exposure regions, high altitude locations, and coastal area environments. All units manufacture and test according to IEC 60282-2:2008, IEEE Std C37.41-2008, and IEEE Std C37.42-2009 standards.
Rated voltage (kV) | Rated current (A) | Rated interrupting current (kA) | Lightning impulse withstand voltage to ground (BIL kV) | Minimum power frequency withstand dry voltage to ground (kV) | Minimum creepage distance (mm) |
11-15 | 100/200 | 12 | 110 | 42 | 220 |
11-15 | 100/200 | 12 | 125 | 50 | 320 |
24-27 | 100/200 | 12 | 150 | 65 | 470 |
33-38 | 100/200 | 8 | 170 | 70 | 660 |
33-38 | 100/200 | 8 | 170 | 70 | 720 |
33-38 | 100/200 | 8 | 170 | 70 | 900 |
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Loadbreak fuse cutouts support various industrial applications across distribution infrastructure. Primary implementations include overhead distribution line protection, distribution transformer primary side protection, and equipment switching operations. These devices support commercial procurement for utility companies, industrial facility power distribution systems, and renewable energy generation interconnection projects. The outdoor-rated construction supports installation in rural distribution networks, urban substations, and industrial park power systems.
When placing orders, specify the following parameters: 1) Rated voltage and rated current values, 2) Minimum creepage distance requirements, 3) Insulator material preference, 4) Arc-shortening rod installation requirement, 5) Mounting bracket type specification. This information ensures accurate configuration matching for specific project requirements.
Loadbreak fuse cutouts operate within 10kV to 38kV distribution systems, with specific models available for 11-15kV, 24-27kV, and 33-38kV voltage classes.
Loadbreak fuse cutouts include an arc chute assembly that enables load current interruption capabilities, while standard fuse cutouts only provide fault current interruption functions.
Two insulator options are available: porcelain construction with cemented hardware fittings, and polymer silicone rubber construction with crimped fiberglass rod assembly.
Production follows IEC 60282-2:2008, IEEE Std C37.41-2008, and IEEE Std C37.42-2009 international standards for design, manufacturing, and testing procedures.
