Products
Disconnecting switch
2、 Category 1: Fuse Base (Fuse Supporting Component)
Representative model: NH00 series (160A, 500V/690V)
Positioning: Pure fuse support/replacement device, does not integrate switch mechanism, needs to be used in conjunction with knife switch or higher-level switch.
Features: Knife type fuse installation structure, 35mm DIN rail tool free installation, blue transparent observation window for real-time viewing of fuse status, flame-retardant engineering plastic shell.
Application: Installation and quick replacement of fuses in low-voltage distribution cabinets and electrical control boxes, serving as overload/short circuit protection points for circuits.
3、 Category 2: Fuse type isolating switch (isolating switch fuse group)
Integrate "switch on/off+isolation+fuse protection" into one, connect, carry, and disconnect circuits under no-load or load conditions, and provide overload/short circuit protection through fuses; When the switch is opened, a clear visible breakpoint is formed to ensure maintenance safety. Divided into two categories based on structure and series:
3.1 HR6 series (blade type/open type)
Representative model: HR6-160/30 (160A, 660V, 50Hz)
Positioning: Classic opening knife type isolation switch fuse group, with intuitive structure and easy maintenance.
Features: Knife switch on/off structure, silver plated copper contacts, top handle operation, six terminal wiring (one in and one out per phase), screw panel installation.
Application: Industrial/commercial distribution main switch or branch switch, motor branch protection and isolation.
3.2 HR17 series (closed modular, main series)
Representative models: HR17-100/HR17-160/HR17-250/HR17-400/HR17-630
Positioning: Modular enclosed fuse type isolation switch, graded according to rated current, covering medium to high current requirements of 100A to 630A, is the main series of the product line.
Common features: Wide top handle/handle operation, blue (semi) transparent observation window with no need to open the cover for checking the melt core, visible breakpoint isolation, flame-retardant engineering plastic shell, support for 35mm DIN rail or screw panel/busbar installation, 50/60Hz broadband compatibility (some models).
Divided by current:
HR17-100 (100A): Small and medium current branch, two versions of flip or drawer handle, suitable for branch protection of distribution boxes/control cabinets;
HR17-160 (160A): Suitable for small and medium current main/branch circuits, supports rail installation, and is suitable for motor and mechanical power protection;
HR17-250 (250A): Medium current circuit, triple arch window, suitable for power distribution in factory workshops and commercial buildings;
HR17-400 (400A): High current main circuit, three arc window, suitable for power distribution cabinet main switch;
HR17-630 (630A): Ultra high current main circuit, PA66 flame-retardant shell, copper bar internal components, suitable for heavy-duty applications such as low-voltage switchgear and capacitor compensation cabinets.
Application: Factory power distribution cabinets, low-voltage switchgear, motor control centers (MCC), main and branch circuit protection for commercial buildings/hospitals/data centers, power cut-off and short circuit protection for large equipment.
- View as
3 Pole Fuse Switch Disconnector 630A 690V
The ZHENGRONG HR17-630 3-pole fuse switch disconnector is a heavy-duty protection and isolation unit for high-current three-phase low-voltage systems. Rated 630A, it combines circuit make/break, isolation and short-circuit/overload protection in one robust device, with a triple-arc translucent blue window for at-a-glance fuse inspection. Built with a flame-retardant PA66 housing and certified to ISO9000, CCC and CE, it is designed for main circuits in industrial switchgear, commercial buildings and infrastructure.
3 Pole Fuse Switch Disconnector 250A 690V DIN Rail
The ZHENGRONG HR17-250 3-pole fuse switch disconnector provides reliable circuit switching, isolation and overload/short-circuit protection for three-phase low-voltage systems. Rated 250A, it features a flame-retardant housing, a triple-arched translucent blue window for at-a-glance fuse inspection and a wide operating handle, with quick 35mm DIN rail mounting. Certified to ISO9000, CCC and CE, it is a dependable protection and isolation solution for industrial and commercial distribution.
3 Pole Fuse Switch Disconnector 400A 690V
The ZHENGRONG HR17-400 3-pole fuse switch disconnector provides reliable load switching, isolation and short-circuit protection for high-current three-phase low-voltage circuits. Rated 400A at 660/690V AC, it features a sturdy flame-retardant housing, a triple-arc translucent blue window for fuse inspection and a wide operating handle. With base fixing for busbar or mounting-plate installation and ISO9000, CCC and CE certification, it is built for demanding industrial and commercial power distribution.
3 Pole Fuse Switch Disconnector 160A 690V DIN Rail
The ZHENGRONG HR17-160 3-pole fuse switch disconnector provides reliable circuit switching, isolation and short-circuit protection for three-phase low-voltage systems. Rated 160A / 690V~ at 50/60Hz, it combines a wide operating handle, a translucent blue inspection window and a compact flame-retardant housing, with flexible DIN rail or panel mounting. Certified to ISO9000, CCC and CE, it is a trusted protection solution for industrial and commercial distribution, motor and branch circuits.
3 Pole Fuse Switch Disconnector 100A 690V DIN Rail
The ZHENGRONG HR17-100 3-pole fuse switch disconnector provides reliable load switching, isolation and short-circuit protection for three-phase low-voltage circuits. Rated 100A / 690V and compliant with GB/T 14048.3-2017, it features a flame-retardant housing, a translucent blue window for fuse inspection and a wide drawer-type handle for comfortable operation. With dual DIN rail and screw mounting plus ISO9000, CCC and CE certification, it is a versatile protection solution for industrial and commercial distribution systems.
3 Pole Fuse Switch Disconnector 160A 690V
The ZHENGRONG HR17-160 3-pole fuse switch disconnector provides reliable load switching, isolation and short-circuit protection for three-phase low-voltage circuits. Rated 160A / 690V at 50Hz and compliant with IEC 60947-3, it features a compact flame-retardant housing, a translucent blue flip window for fuse inspection, and flexible DIN rail or panel mounting. Certified to ISO9000, CCC and CE, it is a trusted protection and isolation solution for industrial and commercial power distribution.
Only fuse support and replacement are required → Select NH00 fuse base (to be used in conjunction with higher-level switches).
Branch/small and medium current (100-160A) → HR17-100/HR17-160, supporting rail installation, balancing cost and flexibility.
Medium current main/branch (250A) → HR17-250, with three arched windows for easy inspection.
High current main circuit (400-630A) → HR17-400/HR17-630, used for the main switch of power cabinets and switchgear.
Prefer classic blade structure and intuitive maintenance → HR6 series.
Export market → Prioritize labeling models with 50/60Hz and IEC 60947-3 versions, and verify the actual parameters on the nameplate.
