General Instruction
LFD series auxiliary switch is one of the auxiliary components for the set
of high-voltage equipments. With the compact structure and 6.5mm
thickness of each section of switch (half of the normal auxiliary switch
section), It adopts the cam composition and permanent magnet magnetic
quenching method which enhance the breaking capacity of the contacts.
LFD series auxiliary switch is applicable both for controlling switch on &
off functions, interlocking, signal circuit of high-voltage-switch driving
mechanism and for conversions or group switches.
Service Condition
1.Ambient temperature : - 40℃~ + 70℃;
2.Altitude : the installation spot is supposed not to exceed 5000m;
3.Humidity : the average value of relative humidity is max 95%,the
average value of vapor pressure is max 2.2kPa in condition within 24
hours; the monthly average value of relative humidity is max 90%,the
monthly average value of vapor pressure is max 1.8kPa;
4.Vibration acceleration is max 15m/s2;
5.There should be no evident air pollutions from dust, smoke, corrosives
and combustible gas, vapor or salty fog.
Working Principles
LFD series auxiliary switch adopts indirect driving structure , it is working
by square shaft to drive the cam wheel rotated, which in turn to push rod
of switch to cause the moving of the contacts, thus to realize the control
of the switch on & off the electric circuits
Installation and Operation
1.Please refer to switch draft for mounting dimension;
2.The auxiliary switch should be installed to the target objects by fixing
the extended screw shaft at both sides of the end plates .The switch itself
should not be subject to external force,otherwise, it will become deformed
and not able to work normally;
3.Lead wire for LFD series auxiliary switch should be adopted screw
connecting method.
Structure Features
LFD series auxiliary switch has the advantages of flexible operation,
compact structure, safe and reliable. LFD series auxiliary switch is made
up of multi-units with same structures and the switch installation is in
various forms and suitable for many kinds of installation assembling. It
adopts permanent magnet magnetic quenching method to enhance the
breaking capacity of the switch .The moving contact is made of pure
brass and the contact point adopts silver and nickel alloy with the high
breaking capacity and long life-time .The insulation plate is made of
superior imported inflaming resistance nylon material which has high
strength, good insulation ,heat-resistant and dustproof structure. It can
be used on all kind of electrical equipments.
Ordering Information
1.Pls indicate product name, specification & model No. ,quantity;
2.Pls make sure the dimension of switch, work route and breaking of contacts
etc;
3.Other requirements