HD Series Isolating Knife Switch With Fuse

Factory Introduction & Product Advantages

As a source manufacturer with 42 years of experience in low voltage electrical components, we independently develop and mass-produce HD Series Isolating Knife Switch with Fuse, an integrated isolation and short-circuit protection component widely used in low voltage distribution systems. Designed for incoming line isolation of distribution cabinets, this isolating knife switch with fuse combines a reinforced pure copper conductive blade structure with an integrated fuse base, providing a visible isolation break point after disconnection to ensure safe electrical maintenance.

 

With rated current options ranging from 100A to 1000A, the switch adopts silver-plated conductive contacts to reduce contact resistance and operating temperature rise. The integrated fuse system provides rapid short-circuit protection, making it suitable for industrial power distribution, municipal electrical systems, and various low voltage applications.

Our 36,000㎡ standardized manufacturing facility is equipped with automatic copper stamping lines, silver plating equipment, and insulation injection molding production systems. Every HD Series Isolating Knife Switch with Fuse undergoes strict quality inspection procedures, including incoming copper material environmental testing, conductive circuit temperature rise testing, insulation withstand voltage testing, and mechanical opening/closing performance inspection.

Products with excessive temperature rise, insulation failure, or abnormal mechanical operation are immediately reworked or eliminated. All finished products receive 100% factory inspection with complete quality records before shipment.

The company has passed ISO14001 Environmental Management System certification, and all raw materials comply with RoHS 2.0 and REACH environmental regulations. We have long provided OEM manufacturing support for leading low voltage distribution cabinet manufacturers and export products to electrical distributors in Southeast Asia and the Middle East.

According to overseas system integrator field tests, this HD Series Isolating Knife Switch with Fuse can operate continuously under full load for 72 hours with temperature rise controlled below 35K. The switch provides stable short-circuit interruption performance without contact welding, while offering a service life significantly longer than ordinary thin copper blade switches.

With an independent R&D team, we continuously optimize the anti-loosening blade structure and develop products compatible with global 50/60Hz power systems. The switch can be installed in GXL, MNS, and various low voltage cabinets, providing overseas electrical distributors with reliable isolation and protection solutions.

OEM / ODM Customization Service

For global low voltage switchgear manufacturers and electrical component distributors, our complete range of HD Series Isolating Knife Switch with Fuse supports professional OEM and ODM customization services.

Customers can provide cabinet installation dimensions, rated current requirements, and fuse specifications. Our engineering team can develop dedicated knife switch solutions according to technical drawings and application requirements.

The minimum order quantity starts from 1 piece, and customized sample development normally takes 1–3 months. According to cooperation conditions, sample units can be provided for complete cabinet temperature rise testing.

Before production, our electrical engineers provide remote technical selection support, helping customers choose suitable current ratings and matching fuse protection capacities.

During manufacturing, customers can request production photos and videos of copper processing, assembly, and temperature rise testing. Long-term partners receive priority production scheduling to shorten delivery time.

Each HD Series Isolating Knife Switch with Fuse comes with an 18-month factory warranty from the shipping date. Our dedicated after-sales team provides support for overseas transportation issues. If products arrive with damaged blades, broken fuse bases, or other transportation-related problems, replacement or return solutions can be arranged.

Third-party factory inspection is also supported according to mutually confirmed technical standards.

Our electrical component production capacity reaches 50,000 sets per month. Standard current models are kept in stock, with regular products available for shipment within 5 working days. Customized current ratings and installation structures can usually be completed within 7–15 days.

Multiple current specifications can be combined within one shipment. For annual bulk purchasing projects, flexible volume pricing agreements are available. Through direct factory supply, we provide overseas customers with complete services including customization, manufacturing, export packaging, and technical support.