What is membrane switch/membrane keypad?
A membrane switch is an electrical switch for turning a circuit on and off. It differs from a mechanical switch. Membrane switch is very thin and soft. The touch surface material usually is PET or PC. The circuit can be PET, FPC or even PCB. Membrane Switches are user-equipment interface utilities that allow for the communication of commands from users to electronic devices.
> Membrane Switches / Membrane Keypads Structure
1) 4 layers structure: Graphic overlay + Spacer + Circuit(can be PET circuit or FPC circuit) + Back Adhesive
2) 6 layers structure: Graphic overlay + Spacer: Dome Retainer + Spacer + Circuit(can be PET circuit or FPC circuit) + Back Adhesive;
3) Other Structure
3.1) Overlay + Rubber Adhesive + Rubber Keypad + Rubber Adhesive + Retainer + Spacer + Circuit + Back Adhesive;
3.2) Overlay + Spacer + Retainer + PCB Circuit;
And also there are many other kinds of structures for the interface keypads structure. It based on customer`s real needs and we can design the suitable and economical structure for our customer`s final application.
Normal Membrane Switches,Digital Printing Membrane Switch,Printing Membrane Switch,Safe Locks Membrane Switches Dongguan LuPhi Electronics Technology Co., Ltd. , http://www.luphiprint.com
The cable is used to transmit power on the power transmission and distribution line of A.C. 50Hz, rated volt-age 35 KV or lower. By comparison with power cable with PVC insulation, it has not only excellent electric perfor-mance, mechanical performance, heat & aging resistant performance, weather resistant performance, chemical corrosion resistant performance, but also simple structure,light weight, no restriction by laying drop, and high tem-perature allowance for long term working(90ºC) as well.
Executive standard
As section "extruded insulation power cable with rated voltage from 1kV(Um=1.2 kV)to 35kV (Um=40.5 kV)" stipulated in GB/T12706.1-2002~ GB/ T12706.3-2002 or IEC60502-1997 according to the re-quirement of the customer.
Working Condition
1,Long-term working temperature by cable conducto is 90ºC.
2,Max. temperature of cable conductor shall be no more than 250ºC during short circuit (the longest lasting time shall be no more than 5 seconds).
3,Environment temperature for installation is no less than 0ºC.
4,Min bending radium of cable:
It is no less than 15 times that of cable outer diameter for cable with three cores.
It is no less than 20 times that of cable outer diameter for cable with single core.
5,A.C. rated voltage U0/U of cable is 0.6/1kV~26/35kV.
U0: rated A.C. voltage of conductor to earth OR between metallic shielding for cable designing, which is called phrase voltage.
U:rated A.C. voltage between conductors for cable designing, which is called wire voltage.
Um: Max endurable value of "Max system voltage"for cable
Type, Description and Application Occasion
Type
Description
Application n
Cu
Al
YJV
YJLV
XLPE insulation PVC sheath power cable
To be laid indoors, in tunnel, cable furrow or pipe, the cable couldn't bear mechanical force outside
YJY
YJLY
XLPE insulation PE sheath power cable
YJV22
YJLV22
XLPE insulation, steel tape armor, PVC sheath power cable
To be laid underground, the cable could bear certain mechanical force, but it couldn't bear great pulling force.
YJV23
YJLV23
XLPE insulation, steel tape armor, PE sheath power cable
YJV62
YJLV62
XLPE insulation, have no the magnetism steel tape armor, PE sheath power cable
YJV32
YJLV32
XLPE insulation, thin steel-wire armor, PVC sheath power cable
Be applicable to the well, water inside and fall in the bad soil, the cable cans bear the equal dint outside the machine with pull the dint
.
YJV72
YJLV72
XLPE insulation, have no the magnetism thick steel-wire armor, PVC sheath power cable
YJV42
YJLV42
XLPE insulation, thick steel-wire armor, PVC sheath power cable
Be applicable to the well, underwater with the bottom of sea, the cable cans bear the bigger pressure with lead to pull the dint.
Note:1: We also produce steel wire armored cross-linked power cable such as YJV32,YJLV32,YJV33,YJLV33 according to the requirement of the customer.
2: Prefi x "ZR" (flame retardant type) shall be added to the original type when flame retardant type cable is needed.
The Figure of Cable Structure
Production Scope
Production 
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35 kV or Lower Power Cable with XLPE Insulation
The cable is used to transmit power on the power transmission and distribution line of A.C. 50Hz, rated volt-age 35 KV or lower. By comparison with power cable with PVC insulation, it has not only excellent electric perfor-mance, mechanical performance, heat & aging resistant performance, weather resistant performance, chemical corrosion resistant performance, but also simple structure,light weight, no restriction by laying drop, and high tem-perature allowance for long term working(90ºC) as well.
Executive standard
As section "extruded insulation power cable with rated voltage from 1kV(Um=1.2 kV)to 35kV (Um=40.5 kV)" stipulated in GB/T12706.1-2002~ GB/ T12706.3-2002 or IEC60502-1997 according to the re-quirement of the customer.
Working Condition
1,Long-term working temperature by cable conducto is 90ºC.
2,Max. temperature of cable conductor shall be no more than 250ºC during short circuit (the longest lasting time shall be no more than 5 seconds).
3,Environment temperature for installation is no less than 0ºC.
4,Min bending radium of cable:
It is no less than 15 times that of cable outer diameter for cable with three cores.
It is no less than 20 times that of cable outer diameter for cable with single core.
5,A.C. rated voltage U0/U of cable is 0.6/1kV~26/35kV.
U0: rated A.C. voltage of conductor to earth OR between metallic shielding for cable designing, which is called phrase voltage.
U:rated A.C. voltage between conductors for cable designing, which is called wire voltage.
Um: Max endurable value of "Max system voltage"for cable
Type, Description and Application Occasion
Type
Description
Application n
Cu
Al
YJV
YJLV
XLPE insulation PVC sheath power cable
To be laid indoors, in tunnel, cable furrow or pipe, the cable couldn't bear mechanical force outside
YJY
YJLY
XLPE insulation PE sheath power cable
YJV22
YJLV22
XLPE insulation, steel tape armor, PVC sheath power cable
To be laid underground, the cable could bear certain mechanical force, but it couldn't bear great pulling force.
YJV23
YJLV23
XLPE insulation, steel tape armor, PE sheath power cable
YJV62
YJLV62
XLPE insulation, have no the magnetism steel tape armor, PE sheath power cable
YJV32
YJLV32
XLPE insulation, thin steel-wire armor, PVC sheath power cable
Be applicable to the well, water inside and fall in the bad soil, the cable cans bear the equal dint outside the machine with pull the dint
.
YJV72
YJLV72
XLPE insulation, have no the magnetism thick steel-wire armor, PVC sheath power cable
YJV42
YJLV42
XLPE insulation, thick steel-wire armor, PVC sheath power cable
Be applicable to the well, underwater with the bottom of sea, the cable cans bear the bigger pressure with lead to pull the dint.
Note:1: We also produce steel wire armored cross-linked power cable such as YJV32,YJLV32,YJV33,YJLV33 according to the requirement of the customer.
2: Prefi x "ZR" (flame retardant type) shall be added to the original type when flame retardant type cable is needed.
The Figure of Cable Structure
Production Scope
ProductionÂ
Â
Flame Retardant Zr-Yjv Power Cable XLPE Insulated Power Cable
Model NO.: Zr-Yjv
Wire Core Material: Red Copper Wire
Certification: ISO
Model: YJV
Brand: Hufei
Conductor Material: Copper
Jacket: PVC
Armored: Sta or Swa
Nominal Voltage: 21/35-26/35kv
Voltage Test: 73.5kv/91kv
Partial Discharge Test: 1.73 U0
Trademark: Hufei
Transport Package: International Wooden Drum
Specification: CE
Origin: Shanghai
HS Code: 85444911
Model NO.: Zr-Yjv
Wire Core Material: Red Copper Wire
Certification: ISO
Model: YJV
Brand: Hufei
Conductor Material: Copper
Jacket: PVC
Armored: Sta or Swa
Nominal Voltage: 21/35-26/35kv
Voltage Test: 73.5kv/91kv
Partial Discharge Test: 1.73 U0
Trademark: Hufei
Transport Package: International Wooden Drum
Specification: CE
Origin: Shanghai
HS Code: 85444911
35 kV or Lower Power Cable with XLPE Insulation