Railway cable product technology: in TB/ t2476-1993, railway cable servtb /T3100.1 ~.5-2004 "railway digital cable" Q/ jtl051.33-2001 integrated shielding cable.

In order to evaluate the flame-retardant performance of wire cables, iec 60332-1, iec 60332-2 and iec 60332-3 were formulated respectively. Iec60332-1 and iec60332-2 are respectively used to evaluate the flame retardant capability of a single cable when it is laid on an incline and vertically (corresponding to GB12666.3 and GB12666.4 in China). Iec60332-3 (domestic equivalent to gb12666.5-90) is used to evaluate the flame retardant capability of beam cable when it is vertical, compared with that of beam cable when it is vertical.
NH-VV33NH-VLV32聚氯乙烯绝缘细圆钢丝铠装聚乙烯护套耐火电力电缆PVCinsulatedthinsteel-wirearmouredPEsheathpowercableNH-VV42NH-VLV42聚氯乙烯绝缘粗钢丝铠装聚氯乙烯护套电力电缆PVCinsulatedthinste。
4.工作电容:平均值52±2nF/km5.远端串音防卫度:150kHZ时指定组合的功率平均值大于69dB/km。产品特性:电缆的额定电压:500V●电缆的最低工作温度不低于-40℃.●电缆的最高长期允许工作温度:聚乙烯绝缘不高于70℃;交联聚乙烯绝缘不高于90℃。

适用范围:适用于高速公路中紧急电话通信系统用于传输音频信号及控制信号。绝缘1绝缘应采用符合规定的高密度聚乙烯。2绝缘线芯采用颜色识别标志,绝缘颜色识别应均匀,并采用下列颜色:星绞:白、蓝、红、绿单元线组星绞组绝缘线芯按白、蓝、红、绿顺时针排列。
Q—三极管或者场效应管。e-发射极,b-基极,c-集电集。LED—发光二极管。T—变压器。SW—开关。L—电感。K—继电器。GND—公共接地端。LS—蜂鸣器。FS—保险管。RTH—热敏电阻。电子电路和宏观电力控制电路的联系。1,电子电路是由微型的电子元器件构成,通过电路板进行线路连接。通常情况下,电子电路整体都会分为若干个部分:电源部分,整流桥部分,滤波部分,稳压部分,放大部分,矢量输出部分等等,而这些部分一般而言都是大致固定的模式,大致的元器件,大致的原理,在一定程度上可以通用。
2交接箱内接线端子的排列,以25对为一基本单位,与市话电缆的基本单位一致,并在端子标有编号,便于施工检修。3接线模块的结构、排列及安装尺寸与3M公司产品完全一致,可以互相通用。4箱体经静电喷塑处理,美观大方,线条清晰、防腐防水性能好使用寿命长。
用于传输和分配电能的电缆。常用于城市地下电网、发电站的引出线路、工矿企业的内部供电及过江、过海的水下输电线。在电力线路中,电缆所占的比重正逐渐增加。电力电缆是在电力系统的主于线路中用以传输和分配大功率电能的电缆产品,其中包括1-500KV以及以上各种电压等级,各种绝缘的电力电缆。
Main technical performance and indexes of signal cable for mining: 20 ℃ when the conductor dc resistance Ω / 7/0.28 7/0.28 or less 45 km (3 steel 4 copper) 73 1/0.8 or less or less natural attenuation (800 ~ 1000 hz) 36.7 dB/km acuities were 1.1, 1.3, 0.95 or less 20 ℃ or less insulation resistance of cable insulation wire core M Ω. Km 3000 line of work or capacitance (800 ~ 1000 hz) uF/km 0.06 or less near end crosstalk attenuation (800 ~ 1000 hz) dB / 500 M or 70 inductor (800 ~ 1000 hz) UH /km is less than or equal to 800. The ac power frequency voltage is 1.5KV/1min. The dc resistance difference is less than or equal to 2% of the loop resistance

使用特性(1)电缆导体的最高额定温度为70℃。(2)短路时,(最长持续时间不超过5s)电缆导体的最高温度不超过160℃。双绞屏蔽线RVSP2、产品介绍:RVSP系列在RVS的基础上再加上一层铜丝屏蔽网,常被用于那些对传输的信号要求很高的场合。
ZR-BPVVP2聚氯乙烯绝缘和护套铜带绕包屏蔽变频电力电缆。ZR-BPVVPP2聚氯乙烯绝缘和护套铜丝编织铜带绕包屏蔽变频电力电缆。ZR-BPVVP3聚氯乙烯绝缘和护套铝聚酯复合膜绕包屏蔽变频电力电缆。
Local cable USES manufacuring HYA, HYAT, HYAC, HYPAT, HYPA and HYA53 HYAT53, HYPA53 HYPAT53 type cable is designed for main telephone switching area, relay telephone cable, manufacuring HYA, HYAT, HYPA and HYPAT is mainly used for pipe laying, also can be used for overhead, but need to disconnect; HYAC only applies to overhead, no need for suspension lines or hooks; The HYA53, HYPA53, and HYPAT53 cables provide the mechanical strength and corrosion resistance of the cables. They can be laid in any way, which is more suitable for direct burial in rock areas. The operating temperature is -30 ~60 degrees.
就该起事件来看,作业者也曾“现场反复核对了53P屏位正面面板和压板、左侧端子排”,说明作为专业继电保护工,还是有很强的安全意识和业务素养,怕出现误短接误跳开关,风险辨识是很到位的。面对几乎一个模样的端子排,或许他也曾对检修间隔与运行间疑惑和担心过,可惜还是在源头上出了问题,在二次设备及回路工作安全技术措施单将措施填写错误,为下一步传动误短接端子埋下了隐患。其本人、班组成员同样缺乏一种质疑的精神,是习惯了还是不清楚?事件往往是这样的,一步错,步步错,直至扩大后才恍然醒悟。
1、YJV22-1KV3×35mm2 +1×16mm22、YJV22-1KV3×95mm2 +1×50mm23、YJV22-1KV3×120mm2 +1×70mm24、YJV22-1KV3×150mm2 +1×70mm25、YJV22-1KV3×185mm2 +1×95mm26、YJV22-1KV3。
在整个网络布线中应用一种布线方式,但两端都有RJ-45插口的网络连线无论是采用568A标准,还是568B标准,在网络中都是可行的。双绞线的顺序与RJ45头的引脚序号—一对应。10M以太网的网线使用1、2、3、6编号的芯线传递数据,而100M网卡需要使用四对线。

In order to improve the quality of the cable, we choose high electrical insulation materials production, such as special cable 1.8/3 kv frequency conversion motor, with 10 kv crosslinked insulating materials, special cable adopts frequency conversion motor of 6/10 kv, 35 kv crosslinking insulation materials, conductive shielding, insulation shield and insulation adopts the imported materials. In the process of production, we put special emphasis on the purification of raw materials, shielding closely with extruded insulation materials, control the uniformity of the insulation eccentricity and insulation outside diameter, which can reduce the interface effect, improve the electrical cable properties.
耐火电缆/NHVV耐火电力电缆,本产品按GB12706《额定电压35kV及以下铜芯、铝芯塑料绝缘电力电缆》和GB12666《电线电缆燃烧实验方法》标准生产,本产品适用于工频额定电压0.6/1kV及以下配电线路或工业装置中有耐火要求的固定敷设场所使用。
