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FH1 series auxiliary switch

Rated Voltage:DC220V AC220V

Rated Current:10A

Conventional Thermal Current:15A

Breaking Capacity:DC220V/4A , T0.95 :6P=300ms ; AC220V/10A , Cosφ=0.4

Ambient Temperature:-40℃~+70℃

Withstand Voltage:2500V(50Hz) /1min

Life Cycle:20000 次



General Instruction

FH1 series auxiliary switches are developed to suit for miniaturization of high-voltage set of equipment on basis of FH stable switches. The shape is smaller to save installation space and applicable both for the controlling of switch on & off functions, interlocking, signal circuits of the high-voltage-switch driving mechanism and for conversions or group switches, moreover it`s more suitable to be used for less internal space driving mechanisms like GIS.


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.

Meaning of the Symbol  


E.g.: Model no. FH1-14Y01 means FH1 series, 14 poles, Screw connection mode, 
7 NO contacts and 7 NC contacts.

Technical Parameters

額定電流 Rated current


約定發熱電流 Conventional thermal current



Rated voltage

直流 DC

交流 AC




開斷容量 (>1°/ms

Breaking capacity(>1°/ms)

T0.95 6P=300ms





工頻耐壓 Withstand voltage

2500V(50Hz) /1min

機械壽命 Life cycle



Structure Features
FH1 series auxiliary switch is made up of multi-units with same structures. The contact point adopts silver alloy; the moving and static contact are made of pure copper, and the insulation plate is made of superior inflaming retarding material with high strength, good insulation property and heat-resistance.

Working Principles
FH1 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 function of 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 front end plate with four screw holes and extended screw rod. The switch itself should not be subject to external force; otherwise, it will become deformed and not able to work normally;
3.The serial numbers of contacts could be customized, and the switch operation should be within effective angles.
4.The rotating handle should not be subject to radial force, otherwise it will cause bending of the shaft thus affects its normal operation.
5.Lead wire should be connected by screwing.

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.


Construction Drawing

n=insulation plate quantity;L,L1, L2=customer's requirements