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III. Model Description
2: Front central lever transmission mechanism type,
rear maintenance
3: Side handle type, front maintenance
4: No-panel front side square lever transmission
mechanism type, front maintenance
Number of poles: 3 poles
Conventional thermal current
Design code
Fuse knife switch
IV. Structural Features of Switch
The fuse knife switch is a combination of the fuse and the knife switch, which
has the basic performance of fuse and knife switch. Under the condition of
normal power supply of the circuit, the knife switch is used to turn on and off
the circuit. When the line or equipment is overloaded or short-circuited, the
fuse is blown to cut off the fault current.
The switch has three operation modes and maintenance directions, which is
suitable for the installation and use of various low-voltage switchgears and
distribution cabinets.
1). Front central lever transmission mechanism type, rear maintenance
2). Side handle type, front maintenance
3). No-panel front side square lever transmission mechanism type, front
maintenance
Among them, the switch for front operation and front maintenance has a door
in the center for the maintenance and replacement of fuse, which is mainly
used for the installation on the BDL distribution panel. The switch for front
operation and rear maintenance is mainly used for the installation on the BSL
distribution cabinet. The switch for side operation and front maintenance can
be used for the closed power distribution cabinet.
The switch is equipped with a safety baffle and an arc extinguishing chamber,
which is riveted by phenol-formaldehyde laminated cardboard and metal arc
extinguishing grid, greatly enhancing the arc extinguishing ability of the
switch.