HR20 type low-voltage knife melting switchDetailed product description：

HR20 low voltage knife fuse switch (low voltage fuse switch) is a combination of knife switch and fuse Suitable for use in outdoor low-voltage circuits Used for connecting and disconnecting power supply under normal feeding conditions, and for circuit protection in case of short circuit or overload Transformers can be used for outdoor transmission lines in rural power grids, agricultural and forestry fields, urban power grid renovation, railway petrochemicals, indoor and outdoor areas, and factories of all sizes

structural characteristics

The HR20 low-voltage fuse switch adopts a three pole common base assembly, with clamp type moving and stationary contacts fixed on the base by pillar insulation for each pole. The moving contact part is rigidly connected to the two insulated conductive parts by a ceramic knife, and the user selects a suitable fuse link to connect between these two conductive parts, serving as a switch and fuse An arc extinguishing contact is installed between the moving and stationary contacts. The design is such that when the main contact needs to make contact, the arc extinguishing contact comes into contact first to prevent the arc from burning out the main contact There is a circular release device above the moving contact, which can be operated remotely on the ground using insulated hooks It has a simple structure and reliable performance Advantages such as ease of use

Appearance and installation dimensions

HR20-0.5 (Type 2)


HR20 type low-voltage knife melting switch