YJV高壓電力電纜10/35KV-3*2.5零售店電纜的額定電壓應(yīng)適合于電纜系統(tǒng)的運行狀況，用U0/U（Um）kv表示。
U0－電纜設(shè)計用的導(dǎo)體對地或金屬屏蔽之間的額定工頻電壓；
U－電纜設(shè)計用的導(dǎo)體間的額定工頻電壓；
YJV高壓電力電纜10/35KV-3*2.5零售店
電纜額定電壓的選擇 Voltage designation
· 電纜的額定電壓應(yīng)適合于電纜系統(tǒng)的運行狀況，用U0/U（Um）kv表示。
U0－電纜設(shè)計用的導(dǎo)體對地或金屬屏蔽之間的額定工頻電壓；
U－電纜設(shè)計用的導(dǎo)體間的額定工頻電壓；
Um－設(shè)備可承受的“Z高系統(tǒng)電壓"的Z大值。
The rated voltage of the cable for a given applixation shall be suitable for the operating conditions
in the system in which the cable is used,and is expressed in the form of U0/U（Um）kv
Where:
U0－The rated power-frequency voltage between conductors and earth metallic screen ,for which the cable designed;
U － The rated power-frequency voltage between conductos, for which the cable designed;
Um－ The maximum value of the“highest system voltage"for which the equipment may beused.
· 三相系統(tǒng)用電纜的U0值推薦如下表：
The values of U0 recommened for cable to be used in three-phase systems are listed below:
YJV高壓電力電纜10/35KV-3*2.5零售店
高壓電力電纜專業(yè)生產(chǎn)廠家 |
U kv | U m kv | U 0 * kv | A 和 B 類系統(tǒng) System categories A and B | C 類系統(tǒng) Systems categories C |
| 6 | 7.2 | 3.6 | 6 |
| 10 | 12 | 6 | 8.7 |
| 15 | 17.5 | 8.7 | 12 |
| 20 | 24 | 12 | 18 |
| 30 | 36 | 18 | － |
| 35 | 40.5 | 21 | 26 |
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A類系統(tǒng)──該類系統(tǒng)任何一相導(dǎo)體與地和接地導(dǎo)體接觸時，能在1min內(nèi)與系統(tǒng)分離
B類系統(tǒng)──該類系統(tǒng)僅包括單相接地故障短時運行的條件，接地故障時間應(yīng)不超過1h, 但在任何情況下，Z長不超過8h每年接地故障總持續(xù)時間不超過125h；
C類系統(tǒng)──不屬于A類、B類的系統(tǒng)。
System category A──This category comprises those systems in which any phase conductor that comes in contact with earth or an earth conductor. is disconnected from the system within 1 min.
System category B ──This category comprises those system which,under faultconditions,are operated,are operated for ashorttimewith one phase earthed.This period should not exceed 1 h..Fora longer period, not exceeding 8h on any occasion, can be tolerated.The total duration of earth faults in any year should not exceed 125h.
System categeory C──This category comprises all systems which do not fall into A and B
電纜的型號Type of cable |
型號 Type | 名稱 Designation | 適用范圍 Application | YJV | 銅芯交聯(lián)聚乙烯絕緣氯乙烯護套電力電纜 Copper conductor,XLPE insulated and PVC sheathed power cable | 室內(nèi)、隧道及電纜溝等場所，不能承受機械外力。單芯電纜不允許敷設(shè)在磁性管道中。 For laying indoors 、 intunnel or cable trench,unable to bear external mechan-icalforces.Single-core cable in magnetic duct is not permissible | YJLY | 鋁芯交聯(lián)聚乙烯絕緣乙烯護套電力電纜 Aluminium conductor, XLPE insulated and PVC sheathed power cable | YJY | 銅芯交聯(lián)聚乙烯絕緣氯乙烯護套電力電纜 Copper conductor ,XLPE insulated and PEsheathed power cable | YJLY | 鋁芯交聯(lián)聚乙烯絕緣氯乙烯護套電力電纜 Alumimium conductor ,XLPE
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