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
 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
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Small computer system interface (SCSI) is an independent processor standard for system level interfaces between computers and intelligent devices (hard disks, floppy drives, optical drives, printers, scanners, etc.). SCSI is an intelligent universal interface standard.
In addition to SCSI, IDE is also a very common interface. From the point of view of ease of use, IDE is more suitable for ordinary users. In addition, personal computer users not only need to configure a few peripherals, but also do not require high speed. Therefore, it is more appropriate to choose IDE interface. In addition, IDE also has the characteristics of high performance price ratio and wide application. Although the SCSI interface has many incomparable characteristics, the price of the interface and its peripherals is too expensive to be borne by ordinary users, which determines the limitation of its actual use range.
1. The working mode of IDE requires the whole process participation of CPU. When the CPU reads and writes data, it can't perform other operations. In this case, in the multitask operating system of Windows 95 / NT, the system reaction will be greatly slowed down. The SCSI interface controls the data reading and writing operation completely through the independent high-speed SCSI card, so the CPU does not have to waste time to wait, which obviously can improve the overall performance of the system. However, IDE interface has also made great improvements to improve this problem. DMA mode can be used instead of PIO mode to read and write data. DMA channel is responsible for data exchange, which greatly reduces the CPU consumption. However, comparing the CPU utilization of SCSI and IDE, we can find that SCSI still has considerable advantages.
2. The scalability of SCSI is larger than that of IDE. Generally, each ide system can have two IDE channels, with a total of four IDE devices. The SCSI interface can connect 7-15 devices, much more than IDE, and the cable connected is far longer than ide.
3. Although the price of SCSI device is higher, compared with IDE, the performance of SCSI is more stable, durable and reliable.
SCSI Solder Type Section
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