钢带表面经涂塑处理，以防腐蚀和水份侵入。
23，22型采用双层钢带绕包也有相似的性能。
3、铠装通信电缆护套：黑色高分子量低密度聚乙烯或聚氯乙稀护套。
护套厚度可取决于基本电缆外径。
5、铠装通信电缆标记内容有：导线直径、线对数量、电缆型号、长度、制造厂厂名代号及制造年份。
Basic cable: any filled and unfilled cable with a single or double sheath structure.
1. Wire: annealed bare copper wire with a diameter of 0. 30, 0. 42, 0. 52, 0. 60, 0. 70, 0. 80, 0. 90 (mm). 2. Insulation material: high density polypropylene or polypropylene, color of the insulation line according to the whole chromatogram. 3. Pair of insulated wires: twisted two insulated wires of different colors into pairs according to different pitch, and used the specified chromatographic combination to identify the pairs. 4. Communication cable core structure: take 1 pair as the basic unit, more than 25 pairs of cables are combined according to units, and each unit is wired with the unit of specified chromatogram in order to identify different units. 100 pairs of cables with more than one pair of cables plus 1% of the reserve pair, but not more than 6 pairs. The gap in the core is filled with oil paste. 5. Core wrap belt: wrap with polyester film tape. 6. Shielding: copper wire shielding or metal strip with or without striping, which is longitudinal wrapped outside the core of communication cable. 7. Sheath: blue low-density polymer. Communication cables with double sheaths can also be provided.
聚烯烃绝缘石油膏填充市内通信电缆HYAT电缆型号有ZRC-HYATHYATHYAT23HYAT53ZRC-HYAT23ZRC-HYAT53HYYT;ZRC-HYAT;低烟无卤通信电缆填充石油膏系列WDZ-HYATWDZ-HYAT23WDZ-HYAT53充油通信电缆 HYAT HYAT23 HYA。
Such a cable structure features: type manufacuring HYA communication cable chromatography used in high-density polyethylene polythene insulation, lu: su composite sheath (namely cable is applied to longitudinally wrap shielding ribbon and sheath bonded into an organic whole, forming sealing protection layer), has a superior electrical properties, the characteristics of the construction is convenient. Such a cable main electrical properties: 1. The dc resistance: 20 ℃, 0.4 148 or less? / km 0.5 95.0 or less? / km 0.6 65.8 or less? / km 0.8 36.6 or less? / km2. Insulated electrical strength: 1 min 1 kv no breakdown between the conductor and conductor shielding 1 min 3 kv is not breakdown (3) insulation resistance: each conductor and the rest of the grounding wire core, inflatable cable is more than 10000 m Ω. Km, filling type cable is more than 3000 m Ω. Km. 4. Working capacitance: average value: 52 + / -2nf /km5
快速看图需要把握线号。
线号。
正规电路图中，任何一条线，任何一个接线端子都是有线号的，线号就是导线的名字，同样的线号就是同样的分支和作用。
快速从线号切入看复杂的电路图也是一个好方法。
5，最重要：电路原理+经验储备。
平时多看图，多理解原理，积累的多了，看图自然就很容易，很轻松了，轻松的掌握了，复杂的自然不在话下。
当然还有很多其他的快速看图的方法，纯经验。
说的不恰当的地方还请师傅们及时斧正，感谢。
欢迎关注，一起交流学习电气电工知识。
直流电阻:20℃,0.4mm铜线,小于等于148Ω/km，0.5mm铜线,小于等于95Ω/km。
2.绝缘电气强度：导体之间1min1kv不击穿导体与屏蔽1min3kv不击穿3.绝缘电阻：每根芯线与其余线芯接地，控制电缆大于10000MΩ.km,HYAT电缆大于3000MΩ.km。
注：可根据用户要求生产（ZR）阻燃型、（IA）本安型及耐高温型计算机电缆。
YJV－PVLV－PYJLV－P聚氯乙烯(交联聚乙烯)绝缘金属屏蔽聚氯乙烯护套电力电缆。
YJLV22－P聚氯乙烯(交联聚乙烯)绝缘金属屏蔽钢带铠装聚氯乙烯护套电力电缆。
(如计量测试、信号显示、自测遥测、计算机联网、报警等)产品型号：KVV硬芯聚氯乙烯绝缘聚氯乙烯护套控制电缆应用标准：GB9330电缆结构：导体：单根粗铜丝或多根铜丝绝缘：PVC/A型聚氯乙烯绝缘填充物：PP带或无纺布包裹缓冲护套：ST1聚氯乙烯护套颜色：黑色(RAL9005)灰色(RAL7001)额。
在交联聚乙烯绝缘高阻燃的基础上又开发了低烟无卤高阻燃隔氧层动力电缆，其低烟无卤性能符合国家标准GB/T17651.1.2和GB/T17650.1.2。
这样本公司的交联聚乙烯动力电缆的整体水平低于国内领先地位。
Flame-retardant Cables: ibec60332-3 / bs4066-3 flame-retardant grades (BunchedWires or Cables vertical Flame On BunchedWires/Cables) this is a beam cable. According to the test regulations, the 3.5m long cable samples are fixed with iron wire on the trapezoid frame, and the number of samples is determined according to the non-metallic materials required for different classification. The sample is hung vertically on the back wall of the furnace and air is introduced into the furnace through the inlet on the bottom plate. At 750 ℃ flame propane plane and the sample, the sample in the compulsory blowing (5 m3 / min air emissions, wind speed 0.9 m/s), must be in vertical combustion is not up to 20 minutes, cable within 2.5 meters flame spread out on its own. IEC60332 is divided into A, B, C and D to evaluate the flame retardant performance.
Any kind of laying can be adopted, which is more suitable for laying in rock area. HYA23 double metal clad double sheath communication cable HYAT series oil filled telecommunication cable (HYAT HYAT23, HYAT53: HYAT23 100 x2x0. Details of the 4: multi-cores iron cable HYAT23 HYA23 200 x2x0. 4 big logarithmic armoured cable HYAT23 logarithmic galvanized steel cable.
PLC和外围线路，也是需要自己动手去摸索的，因为基本的东西就是通过输入和输出I/O来外边的控制线路关联起来，你要分清楚COM公共端是什么东西，为什么会有NPN和PNP这些输入，晶体管和继电器输出又是什么东西，可以简单找个按钮，按照说明书来接线，形成了单个电气回路，按下按钮，PLC输入对应的I/O的LED灯必须能亮起来，松开按钮，这个灯要能灭掉，这样输入回路才是正常的，你也就顺利的理解了输入回路和PLC之间的关联了。
本公司生产的耐火型动力电缆为额定电压0.6/1KV铜芯电缆，还可以生产低烟无卤耐火动力电缆、高阻燃隔氧层耐火动力电缆，其耐火性能符合GB/T12666.6《电线电缆耐火特性试验方法》。
耐火系列动力电缆的整体性能优良可靠。
3、电子计算机电缆型号及使用范围：产品型号规格范围使用场合JVV,JVVR,JYV,JYVR,JYJV,JYJVR,JVPVJVVP,JYVP,JYJVP,JVVPR,JYVPR,JYJVPR,JVVP2,JVVP2R,JVVP3,JVVP3R0.12-1.5Mmm21-100对（3线组）用于一般工。
敷设时电缆的温度应不低于0℃，敷设时弯曲半径应不小于电缆外径的10倍。
有铠装层或铜带屏蔽结构的电缆，应不小于电缆外径的12倍。
适用于交流额定电压U0/U=0.6/1KV供电回路中。
电缆导体的最高工作温度为70℃短路时：电缆导体最高温度不超过160℃（持续时间不大于5S）电缆允许弯曲半径不小于15D注：D为电缆外径mm。
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