集散型仪表信号电缆一、产品特点及用途该产品为计算机控制电缆的升级换代产品,其主要特征在于每个线对（或三线组）均有单独屏蔽,称“分屏”,分屏有铜线或镀锡铜线编织屏蔽、铝塑复合带绕包屏蔽、铜塑复合带绕包屏蔽三种。
本产品具有较强的抗电磁干扰、抗雷击及均匀电场，改善供电品质的特性。特别适用具有精密电子装置的场所，如计算机中心、航空航天监控中心、智能大厦等。本产品按GB9330《塑料绝缘控制电缆》、IEC60227《额定电压450/750V及以下聚氯乙烯绝缘电缆》以及IEC60502《额定电压1-30KV挤包绝缘电力电缆及附件》等标准制造。
领取了以M开头的新型号MA标志证书。产品在全国几十个煤业集团及矿山上使用，获得了较高的评价和赞誉。行车用专用电缆产品用途：本产品具有柔软、耐磨、防油等特性，线旁附钢丝绳，增强抗拉力。适用于交流额电压450/750V及以下的行车、台车、传输机械等移动电器用动力传输线及控制、照明通讯线路，本产品已广泛应用于冶金、电力、船舶、港口等行业。
1, code DJ - (series code) electronic computer shielded cable Y -(insulation code) high-pressure polyethylene F - (insulation code)fluoroplastic V - (sheath code) polyvinyl chloride (R - said manystrands of soft wire core P - (block code) copper mesh shielding P1tin plated copper mesh shielding P2 copper tape screened P3aluminum-plastic composite membrane shielding for example 1:2,product specifications order 7 (14) to 1.0 was computer shieldedcable can be represented as: (1) total shielding DJYVP7 * 2 *1.0mm2 (2) partial shielding multiple soft lines DJYPVR7 * 2 *1.0mm2 (3) total shielding DJYPVP7 * 2 * 2 * 1
Propane burner plane with the flame of 750 ℃ and contact sample,sample in the compulsory blowing (5 m3 / min air emissions, windspeed 0.9 m/s), must be in vertical flame combustion is not up to20 minutes, cable within 2.5 meters flame spread out on his own.IEC60332 is divided into A, B, C and D to evaluate the flameretardant performance.
一台8508A真的就能够完成55XX系列校准器的校准吗?我们必须对不同的型号做具体的分析。在5500550255205522A的维护手册中，对这些仪器的校准要求和校准方法作了详细说明。尤其是提出了各个功能的校准调整点。只有保证这些校准调整点的准确度，才能保证仪器各个功能全范围的性能。当检查仪器性能时，应该尽量包含这些校准调整点。如果发现校准器准确度下降，必须通过调整这些点来恢复仪器的准确度。
Purpose of HYAT solid insulated filled cable: solid insulatedfilled cable is suitable for the urban telecommunication line ofthe local telecommunication network in the town of wuyu, and alsofor the special network line connecting to the public network.Mainly used for pipeline laying. The inner and outer surfaces ofthe cable core and the shield layer are filled with oil paste andpoured to prevent water intrusion. The mechanical and electricalproperties of the cable remain unchanged under conditions of 30~C -60~C. Structure: wire: annealed bare copper wire, copper wirediameter 0. 32, 0. 40, 0. 50, 0. 60, 0. 70, 0. 80, 0. 90 (mm).Insulating material: high density polypropylene or polypropylene,colour of the insulated wire as indicated by full chromatograph.Pair of insulated wires: twist two different colored insulatedwires into pairs at different pitch and use the specifiedchromatographic combination to identify pairs. Core structure: with25 pairs as the basic unit, more than 25 pairs of cables areassembled according to the unit, each unit is wired with the unitof specified chromatogram to identify different units. 100 pairs ofcables with more than one pair of cables plus 1% of the reservepair, but not more than 6 pairs. The gap in the core is filled withoil paste. Core tape: wrap with a polygrease film tape. Shielding:metal strip with or without striping, which is longitudinal wrappedoutside the core of the cable. Sheath: black low density polymer.Double sheathed cables can also be provided. Identification andmarking: cable outer surface sexual identification mark, mark at nomore than alternate 1 m intervals, tag contents are: the diameterof wire, line number, cable type, factory name and year ofmanufacture, marking at no more than alternate 1 m intervals tomark on the surface, but with the tag stagger. Other structures:according to the needs of users, we can provide armored cablesHYAT53, HYAT55 and high frequency isolation cables YATG withstrengthened mechanical protection layer.
②识别灯标。用规定的莫尔斯电码间歇地发出绿色闪光。在一个地区有几个机场时，每个机场设一个，发出不同电码以示区别。③进近灯。又名下滑灯。按照跑道类别，由十几个至一百多个灯组成进近灯光系统，帮助驾驶员对准跑道、调整飞机姿态和判断到跑道入口的距离；有时还在进近灯光系统的中线上加装一组由脉冲氙灯组成的顺序闪光灯。
KVV22型、ZR-KVV22型450/750V铜芯聚氯乙烯绝缘聚氯乙烯护套钢带铠装控制电缆 。KVV32型、ZR-KVV32型450/750V铜芯聚氯乙烯绝缘聚氯乙烯护套钢丝铠装控制电缆 。KVVR型、ZR-KVVR型450/750V铜芯聚氯乙烯绝缘聚氯乙烯护套控制软电缆 。
接地引出线要求采用我镀锡编织铜线，和电缆铜带连接时应用铬铁锡焊，不宜用喷灯封焊，以免烧损绝缘。③三相铜带屏蔽应分别与地线相连，注意屏蔽接地线和钢铠接地线应分别引出，相互绝缘，焊接地线的位置应尽量靠下。对电缆端头和中间接头的基本要求：a.导体连接好；b.绝缘可靠，推荐采用辐照交联热收缩型硅橡胶绝缘材料；c.密封良好；d.足够的机械强度，能适应各种运行条件。
Some models of power cables: zr-yjv zr-yjlv zr-yjy zr-yjly zr-yjlyzr-yjv22 zr-yjlv22 zr-yjv23 zr-yjv23 zr-yjlv23zr-yjlv3zr-yjv33zr-yjlv32 zr-yjlv32 zr-yjlv33
自承式电缆结构：导线：退火裸铜线，铜线直径为0．32，0．4，0．50，0．60，0．70，0．80，0．90mm。绝缘材料：高密度聚乙烯或乙／丙共聚物，绝缘线的颜色符合全色谱标准。绝缘线对：二根不同颜色的绝缘线按不同的节距扭绞成对，采用规定的色谱组合以便识别。
STEP7中，将定时器抽象成一个特殊的"元件"，它也有自己的"线圈"和"触点"。触点在表示上与其他触点并无二致，也分为常开触点和常闭触点。而定时器的线圈，在梯形图LAD中，显示如所示。定时器的"线圈"定时器的线圈带有两个标识，分别为"定时器号"和"时间预置值"，在编程中，要为其分配有效的值。利用定时器的线圈和触点，再结合逻辑运算，也可以实现多样的控制功能。如所示，利用定时器的触点和线圈，实现与.2相同的功能。
RVVZZRVVR铜芯聚乙烯绝缘软线。RS232/RS-485通讯电缆适用于EIARS-232/422通讯网络，是楼宇自控、工业控制网络、电力自动化等通讯网络的常用电缆型号。RS-485通讯电缆RS-485通讯电缆在一般场合采用双绞线就可以，但在要求比较高的环境下可以采用带屏蔽层的双绞电缆。
1使用特性1.1电缆的使用环境温度为-40℃~+60℃。1.2电缆导体长期工作温度应不超过+70℃。1.3电缆敷设环境温度：聚氯乙烯外护套电缆应不低于0℃;聚乙烯外护套电缆应不低于-20℃。1.4电缆的允许弯曲半径：非铠装电缆应不小于电缆外径的10倍；铠装电缆应不小于电缆外径的15倍。