FN3-12/400A wall-mounted indoor high-voltage load switch, 10KV load switch with fuse tube and CS3 mechanism
Contact Info
- Xiangyang Industrial Zone, Liushi Town, Yueqing City,
- 李经理
- 15167417505
- 864640886@qq.com
The FN3 series load switch is an indoor high-voltage electrical device, mainly used in three-phase AC 50Hz power networks with a rated voltage of 6kV or 12kV. It undertakes the tasks of breaking and closing load currents and overload currents, and can also be used to operate no-load long lines, no-load transformers and capacitors.
I. Main Models and Technical Parameters
The FN3 series mainly includes models such as FN3-12/400A, FN3-12R, and FN3-12R/S. Among them, FN3-12/400A is the representative specification of this series with a rated current of 400A.
The core technical parameters are as follows:
Rated voltage: 12kV.
Operating voltage: 12.7kV.
Rated current: 400A (common specification, there are also 630A and others).
Rated breaking current: 8.5kA (under the condition of cosφ=0.15).
Rated peak withstand current: 25kA.
Rated short-time withstand current: 8.5kA, duration 5 seconds.
II. Structural and Functional Features
This switch is composed of parts such as a base frame, a transmission mechanism, a post insulator, a knife switch, and an arc extinguishing device. Its structural design allows it to be matched with CS3 or CS2 manual operating mechanisms.
A key functional feature is that it can be combined with RN3 type high-voltage fuses. Models with fuses (such as FN3-12R/S) have the ability to cut off short-circuit currents and can be used as overload and short-circuit protection switches.
III. Usage Environment and Installation Requirements
The FN3 load switch is suitable for indoor environments under the following conditions:
Altitude not exceeding 1000 meters.
Ambient air temperature not higher than +40℃ and not lower than -10℃.
Air relative humidity not more than 90% (when the temperature is +25℃).
The environment should be free of conductive dust, corrosive gases that damage metals and insulation, severe vibrations and impacts, and free of fire and explosion hazards.
During installation, the load switch should usually be installed on a vertical wall or metal frame. It is recommended that the distance from its main shaft to the ground be 2.5 meters, and the distance from the operating handle fulcrum to the ground should not be less than 1.1 meters.
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