Expulsion Type Fuse

EC Insulator Jiangxi Co., Ltd. is one of the most reliable manufacturers and suppliers of expulsion type fuse in China. With abundant experience, we are committed to offering high quality custom service. Please feel free to wholesale premium expulsion type fuse made in China here from our factory.

The expulsion type fuse is a practical overcurrent protection device used on medium voltage overhead distribution lines. It works by interrupting fault current within a short time when overload or short circuit happens. This action helps isolate the faulty section so that the rest of the network remains stable and other equipment such as transformers and reclosers is protected from sustained fault current. This expulsion type fuse is widely applied in rural distribution lines, suburban feeders, industrial park circuits and pole mounted transformer connections. Many utilities and electrical contractors choose this expulsion type fuse because it combines fast fault clearing with simple maintenance and reliable field performance. We regularly produce 27kV and 38kV models, with 100A and 200A rated current options for different distribution line requirements.

Fast fault clearing is the most direct benefit of this product. Once the fuse element melts under abnormal current, the gas generating material inside the tube builds high pressure quickly. The internal gas then pushes the arc out through the open end, which helps separate the circuit before serious overheating or equipment damage occurs. The composite housing is designed for long term outdoor service. It has good resistance to ultraviolet light, rain, frost and atmospheric corrosion, so the unit can keep working normally even after years of exposure in harsh weather. Field crews do not need complex tools to complete fuse link replacement. In most routine maintenance cases, the whole replacement process can be finished in a short time, which helps reduce unplanned interruption and improve power availability. Our products have been supplied to distribution projects in Colombia, Chile and Brazil. For regular orders, the production lead time is normally 25 to 30 days after order confirmation.

The main insulating tube is made of high strength composite polymer. This material is selected because it balances good mechanical strength with stable insulation performance. It can support normal operation in ambient temperatures from minus 40 degrees Celsius to 55 degrees Celsius. The internal fuse element is made of high purity conductive metal. Its fusing characteristics are controlled during production so that it carries normal load current reliably and melts quickly when a fault occurs. All metal terminals are processed with hot dip galvanizing. This surface treatment helps reduce rust and corrosion, especially in humid areas or coastal locations where salt spray may affect metal parts over time. Weather resistant rubber seals are fitted at key positions. They prevent moisture and dust from entering the fuse tube, which could otherwise weaken insulation or affect interrupting performance.

We offer different customization options for overseas buyers. The content and position of markings on the insulating tube can be adjusted according to your project requirements. If your tender includes non standard voltage or current parameters, our engineering team can review the technical feasibility before quotation. We can also modify connection dimensions to match existing installation brackets on your project site. For large volume orders, special packaging can be arranged to reduce impact damage during long sea freight. If you send technical drawings or tender specifications, we will provide a feasibility reply within two working days.

Our quality control process starts with incoming material checks and continues through production. Raw materials are sampled and inspected before they enter the workshop. Technicians check key assembly steps to ensure parts are fitted correctly and connections are secure. Finished products are randomly tested for dielectric strength, insulation resistance and mechanical load capacity. We keep records for each production batch, including material inspection results, assembly records and final test data. These records can be used for traceability when customers need shipment verification or project acceptance. Each batch test report includes actual measured values such as leakage current and power frequency withstand test results. Third party inspection can be arranged if your project requires it.

Standard packaging uses sturdy wooden cases with inner cushion protection. The cushion material absorbs shock during handling and sea transit, which lowers the risk of damage to insulating parts and metal terminals. We can print shipping marks on the outer cases as requested, including product description, quantity, part number and destination. This product can be shipped together with insulators, surge arresters and other pole line hardware. For large orders, we usually arrange container loading in 40HQ containers to optimize freight space. After shipment, we provide a full set of documents including packing list, commercial invoice and certificate of compliance. If wooden fumigation marks are required for customs clearance, please inform us before production is completed.

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