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Our 11kV Outdoor Expulsion Drop-out Type Standard Fuse Cutout is the industry-preferred short-circuit protection switch for 10-38kV overhead distribution lines and distribution transformers. Engineered for harsh outdoor environments, this device delivers economical, user-friendly operation and exceptional environmental adaptability, making it a staple for power distribution system protection and load switching operations. Installed on the primary side of distribution transformers and line branch points, it provides reliable overload and short-circuit protection, while also serving as a sectionalizing device paired with a portable loadbreak tool to function as an overhead line disconnect switch for safe maintenance. All units are manufactured and tested in strict accordance with the latest international standards, with rated current options of 100A and 200A, catering to diverse power distribution requirements for power industry professionals and electrical engineering contractors.
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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Our outdoor drop-out fuse cutout is built for long-term outdoor use. For porcelain insulator models, the porcelain body is bonded to hardware fittings via USA CGM INC por-rok ANCHORING cement, with rapid solidification, high mechanical strength and outstanding weather resistance. For polymer insulator models, fittings are crimped onto a fiberglass rod, with one-piece injection-molded high-temperature vulcanized silicone rubber housing, delivering excellent sealing and tracking resistance. All ferrous parts are hot dip galvanized with a zinc coating exceeding 86μm, for superior corrosion resistance in coastal, high-altitude and high-ultraviolet environments.
The single vent design ensures downward and outward exhaust during interruption, preventing rainwater intrusion and improving interrupting capacity. All copper cast parts are made of bronze or brass, with silver-plated convex contact surfaces to reduce contact resistance and guarantee exceptional conductivity. High-strength memory copper alloy sheets ensure stable contact, while the arc-shortening copper rod further enhances short-circuit interruption capacity. Loadbreak models feature a special reinforced nylon arc chamber, with excellent anti-aging and flame retardant properties for reliable load breaking.
This 10-38kV expulsion fuse cutout is widely used in 10-38kV overhead distribution line branch protection, primary side protection of distribution transformers in urban and rural power grids, capacitor bank protection, power grid reconstruction projects, industrial and mining power distribution systems, and power facilities in harsh environmental areas. It is the ideal choice for power grid operators, electrical installation contractors, industrial facility managers and power equipment distributors.
We offer comprehensive customization options, including custom rated voltage and current configurations, adjustable creepage distance, porcelain or polymer insulator options, optional arc-shortening rod installation, and custom mounting bracket types. We also provide stable bulk supply services, with flexible production scheduling, guaranteed lead times, and customized packaging to support large-scale project and inventory replenishment needs for commercial and industrial buyers.
All our expulsion drop-out type standard fuse cutouts are manufactured and tested in strict compliance with IEC 60282-2:2008, IEEE Std C37.41-2008 and IEEE Std C37.42-2009 standards. We use premium raw materials, implement full-process quality control, and have a professional technical team to provide pre-sales parameter matching and after-sales support. With decades of industry experience, we deliver reliable, long-lasting products with stable supply capacity to support your long-term cooperation needs.
Our standard model is designed for 11-15kV systems, with a full series covering 10kV to 38kV to meet diverse voltage requirements.
We offer both porcelain and high-temperature vulcanized silicone rubber polymer insulators, with customizable creepage distance for different pollution levels.
Yes, loadbreak type models are equipped with a reinforced nylon arc chamber, enabling safe load switching with a portable loadbreak tool.
All products meet the latest IEC and IEEE international standards for expulsion fuse cutouts, ensuring consistent performance and global compatibility.
