KNIFE SWITCHES

Knife switches have a simple structure with visible breaking contacts and are generally used only for no-load isolation of power sources, without short-circuit protection. Composite disconnectors feature an integrated insulating housing design with excellent arc-extinguishing performance, suitable for frequent no-load operations to achieve safe electrical isolation. Knife-type fuse switches integrate knife switches with fuses, providing both isolation and short-circuit protection functions. Disconnector fuse groups are combined devices where the disconnector provides a visible breaking point and the fuse handles overload and short-circuit protection. These four types of products are widely used in low-voltage distribution systems as incoming line and branch circuit isolation and protection components.
Note: This translation was generated by AI for reference only.

DISCONNECTOR FUSE GROUP

The isolator‑fuse assembly is a commonly used combination switchgear in low‑voltage distribution systems. The isolator provides a clearly visible disconnection point, ensuring safe maintenance; the fuse handles short‑circuit and overload protection. The product features excellent arc‑extinguishing performance and permits only no‑load make‑and‑break operations. With a compact design, easy installation, and a high safety rating, it is widely employed in distribution cabinets and at the incoming terminals of power circuits. In the event of a fault, the fuse melts to interrupt the circuit, while the isolation function remains independent and reliable, making it an ideal protective and isolating device for branch circuits in industrial, mining, and construction applications.

LOAD DISCONNECTOR

The load‑isolating switch is a new type of low‑voltage isolation device featuring an integrated insulated housing and clearly visible disconnection points. Its arc‑extinguishing structure has been optimized, delivering excellent insulation performance. It is primarily used to isolate power supplies in unloaded distribution circuits, providing a safe disconnecting point for equipment maintenance. The product exhibits strong resistance to high temperatures and aging, with a compact design that ensures convenient installation and operation. It is intended solely for making and breaking circuits under no‑load conditions and does not provide overload or short‑circuit protection; therefore, it is typically used in conjunction with fuses or circuit breakers. It finds extensive application in high‑ and low‑voltage switchgear assemblies, as well as in new‑energy and industrial power distribution systems.