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YJVYJV22高压电力电缆
6kV~35kV中低压铜芯及铝芯交联聚乙烯绝缘电力电缆(YJV电缆,YJV22电缆,YJLV电缆,YJLV22电缆)
XLPEInsulatedPowerCable
交联聚乙烯绝缘电力电缆是采用化学方法或物理方法,使聚乙烯分子由线型分子结构转变为三维网状结构,由热塑性的聚乙烯变成热固性的交联聚乙烯,从而提高了聚乙烯的耐老化性能、机械性能和耐环境能力,并保持了优良的电气性能。
交联聚乙烯绝缘电力电缆导体的允许长期zui高温为90摄氏度,较低绝缘电缆、聚氯乙烯绝缘电缆和聚乙烯绝缘电缆高,且具有重量轻、结构简单、使用方便、耐化学腐蚀和敷设不受落差限制等优点。
26/35KV电力电缆,18/30KV交联电缆,12/20KVYJV电缆,8.7/15KVYJV22电缆线,6/10KV铝芯交联电缆线,3.6/6KVYJLV单芯电缆
中低压交联电缆产品标准Standard
YJVYJV22高压电力电缆本产品按GB12706《额定电压35V及以下铜芯、铝芯塑料绝缘电力电缆》标准生产,同时还可根据用户需要按电工委员会推荐标准IEC、英国标准、德国标准及美国标准生产。
Theproductismanufacturedaccordingtothestandardof《GB12706orIEC、BS、DINandICEAuponrequest.
适用范围Applications
本产品适用于工频额定电压3.6/6kv~26/35kv输配电线路作配送电能子用。
Theproductissuitableforuseinpowertransmissionanddistributionlineswithratedpowerfrequencyvoltage3.6/6kv~26/35kv.
使用特性Operatingcharacteristics
·工频额定电压U0/U为3.6/6kv~26/35kv。
Ratedpower-frepuencyvoltageU0/U:3.6/6kv~26/35kv.
·电缆导体的zui高允许工作温度:90℃。
Max.admissibleoperatingtemperatureoftheconductor:90℃.
·短路时(zui长时间不超过5s)电缆导体的zui高温度不超过2500C。
Max.short-circurttemperatureofconductorshallnotexceed2500C.
(5smaximumduration)
·电缆敷设时环境温度应不低于00C。
Theambienttemperatureunderinstallationshouldnotbelow00C.
·电缆弯曲半径:三芯电缆不小于电缆外径15倍;单芯电缆不小于电缆外径20倍。
Thebendingradiusofasingle-corecableshouldnotlessthan20timesofthecablediameter.
Thebendingradiusofasingle-corecableshouldnotlessthan15timesofthecablediameter.
电缆额定电压的选择Voltagedesignation
·电缆的额定电压应适合于电缆系统的运行状况,用U0/U(Um)kv表示。
U0-电缆设计用的导体对地或金属屏蔽之间的额定工频电压;
U-电缆设计用的导体间的额定工频电压;
Um-设备可承受的“zui高系统电压”的zui大值。
Theratedvoltageofthecableforagivenapplixationshallbesuitablefortheoperatingconditions
inthesysteminwhichthecableisused,andisexpressedintheformofU0/U(Um)kv
Where:
U0-Theratedpower-frequencyvoltagebetweenconductorsandearthmetallicscreen,forwhichthecabledesigned;
U-Theratedpower-frequencyvoltagebetweenconductos,forwhichthecabledesigned;
Um-Themaximumvalueofthe“highestsystemvoltage”forwhichtheequipmentmaybeused.
·三相系统用电缆的U0值推荐如下表:
ThevaluesofU0recommenedforcabletobeusedinthree-phasesystemsarelistedbelow:
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A类系统──该类系统任何一相导体与地和接地导体接触时,能在1min内与系统分离 B类系统──该类系统仅包括单相接地故障短时运行的条件,接地故障时间应不超过1h, 但在任何情况下,zui长不超过8h每年接地故障总持续时间不超过125h; C类系统──不属于A类、B类的系统。 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 电缆的型号Type of cable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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