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江苏春晨电缆有限公司生产JHXG电机引接线，1． 交流额定电压：U0/U 0.6/1KV

zui高工作温度： 180℃

zui低环境温度：固定敷设-60℃

2． 电缆安装敷设温度应不低于-25℃。

3． 电缆允许弯曲半径：电缆zui小为电缆外径的10倍

Single core cable armored problems caused by this website are mentioned in many parts of the single core cable cannot be used for armored AC lines and frequent start and stop of the DC line, why? According to the principle of electromagnetic conversion, when the conductor steel tape armoured single core cable through alternating current (frequent start stop equivalent to alternating current), there is a armouring steel strip has good permeability properties, formation of eddy current in the strip (similar in principle of intermediate frequency furnace), make steel produce high temperature heating. In a very short period of time, resulting in the cable insulation layer to melt or accelerate the aging, insulation damage, resulting in the cable breakdown. If one has no end of steel have a good grounding, because every circle between the strip does not guarantee good contact resistance and the strip itself, and the conductor strip may form a "current transformer, electric potential in some range will have a higher risk. According to the law of conservation of energy, steel strip heating to consume electric energy, will increase the voltage drop on the cable, and then the use of electrical equipment can not normally start, or even damage. Because have some areas must use the armoured cable, can have effectively solve the problems in the environment, such as pest etc.. How to deal with it? You can use steel wire armored cable, aluminum, stainless steel tape armoured cable armored cable or directly using the Armored Core (single) cable.JHXG电机引接线

案例一： 我们协助客户处理至少四次单芯钢带铠装电缆事故——电缆是由其他 厂家生产，长度较短，故障时间约在 3 至 5 年；故障现象是击穿。

One case: We assist customers in production by other manufacturers at least four single core steel armored cable accident - cable, short length, the failure time of about 3 to 5 years; the fault phenomenon is breakdown.

案例二： 我们协助客户处理至少一次单芯钢带铠装电缆事故——电缆是由其他 厂家生产，长度约 500 米，故障现象先有有有有 N 线击穿，更换后，电机不能启 动，线路压降大；建议客户改用 3+2 电缆，问题解决。

Case two: We assist customers in production by other manufacturers at least one single core cable steel armored cable accident -- is about 500 meters in length, the first fault phenomenon ft-21-1 N line breakdown, after the replacement, the motor will not start, line drop; recommend customers to switch to the 3+2 cable, to solve the problem.

分析： 上述案例可见，在交流线路中采用钢带铠装电缆，至少会缩短电缆的 使用寿命。 采用钢带铠装单芯电缆的原因是：由于采购员对设计图纸上电缆型号 规格的理解错误，并主观更改了型号规格。 当钢带铠装单芯电缆在长度短，通过的实际电流比电缆本身的zui大载 流量小得多时，电缆寿命在打折扣；当长度较长时或电流接近电缆的zui大 载流量量，故障立刻表现。 处理办法 采购时，提供设计方案中一样写法的型号规格即可。 在交流线路及频繁启停的直流线路中，不采用钢带铠装单芯电缆，不 将非磁性铠装单芯电缆单独敷设在磁性管道中。 单根导体周围如果有闭合的铁磁材料，流过交流电时的交变磁场会在铁磁材料中产生涡流问题。多芯电缆由于流入流出电流相等（正常运行时），没有电磁感应问题。涡流问题会造成保护装置灵敏度下降、电缆发热、线损增大、寿命缩短，严重时有可能引发火灾。如果需要单芯铠装电缆用于交流系统，可以采用不锈钢、铜、铝合金等非铁磁材料铠装或采取了防止涡流措施的钢带。同样道理，应避免单芯线缆单独穿钢管以及使用闭合的铁磁材料电缆夹具等。 单芯钢带铠装电力电缆在使用上存在着很大的局限性，在结构上也不合理，具体分析如下。

Analysis: the case is visible, using steel armored cable on the line, at least will shorten the service life of the cable. The cause of steel tape armoured single core cable is: because the buyer understanding of design drawings on cable model errors, and subjective change specifications. When the steel tape armoured single core cable in the short length, the actual current flow through the much smaller than the maximum load of cable, cable life in discount; when the maximum load flow length or current near the cable fault, immediay. Approach of procurement, design specifications can be written as. In the line and frequent start stop in the DC line, do not use steel tape armoured single core cable, not the nonmagnetic armour single core cable laying alone in magnetic ducts. If there is a single conductor around closed ferromagnetic materials, alternating magnetic field through the alternating current will produce eddy current problems in ferromagnetic materials. Multi core cable due to the inflow and outflow of current equal (normal operation), there is no electromagnetic induction problem. The problem will cause eddy current protection device, cable line loss decreased sensitivity to fever, increased, shortened life expectancy, may lead to serious fires. If the need for single core armored cable communication system, can be made of stainless steel, copper, Aluminum Alloy and other non ferromagnetic armour material or take measures to prevent eddy current strip. Similarly, the single core cable should be avoided to wear a steel pipe and the use of closed iron and magnetic materials, such as cable clamp. Single core armored power cable has great limitation in use, is not reasonable in structure, concrete analysis is as follows.

由《电磁场》可知，当钢带铠装单芯电缆正常运行时，导体上会通过很大的交变电流（频繁启停的直流电缆线路也相当于是通过交变电流），这样在电缆周围会产生很大的交变电磁场，而铠装用钢带具有良好的导磁性能，在运行中，钢带和导体类似于电流互感器的主副线圈，当有交变的电磁场穿过钢带时，就会感应出交变电流，而钢带本身具有比较大的电阻，引起自身发热，从而在钢带中形成涡流损耗和磁滞损耗，于是在很短的时间内，钢带就会产生较高的温度，再加上导体在正常运行时产生的热量，如果热量无法及时散发出去（如埋地敷设等），就会导致电缆绝缘层融化或加速老化，破坏电缆的绝缘性能，从而造成电缆击穿或提前报废。

By "electromagnetism" shows that when steel tape armoured single core cable during normal operation, the conductor through alternating current (very frequent start stop cable lines is also equivalent to the alternating current), so around the cable will produce alternating electromagnetic field greatly, and armored steel has good magnetic conductivity, in operation in the main, secondary coil strip and the conductor is similar to the current transformer, when alternating electromagnetic field across the strip, will be induced by alternating current, and the strip itself has a relatively large resistance, caused by self heating, thereby forming eddy current loss and hysteresis loss in the steel belt, so in a very short period of time, strip it will produce high temperature, plus the conductor in normal operation of the heat, if the heat can not be distributed in a timely manner (such as laying underground, etc.) can lead to electric The insulation layer of the cable is melted or accelerated aging, and the insulation performance of the cable is damaged, which leads to the breakdown of the cable or the failure of the cable in advance.

目前，国内有不少企业对单芯电缆铠装采用钢丝铠装加铜丝隔离结构，其实这种“隔磁”结构也是不合理的，隔磁结构的目的是要增大磁路的磁阻，减小钢丝中的磁感应强度，从而减小钢丝损耗，可是在实际运行当中，铜丝只能引起磁力线的畸变，而不会中断磁力线，也就是说并不能达到增大磁阻的目的，具体分析详见上海电缆研究所专家马国栋教授所著论文《单芯钢丝铠装电力电缆铠装结构的探讨》及著作《电线电缆载流量》。在《电线电缆载流量》一书中马国栋教授通过大量试验证明单芯电缆采用钢丝铠装加铜丝隔离结构会降低电缆的载流量（注：水低敷设电缆不在讨论之列），但是由于钢丝铠装电缆能够承受很大的拉应力，目前应用仍然很广泛。

At present, there are many domestic enterprises to adopt steel wire armored plus wire isolation structure on single core cables, actually this kind of "magnetic" structure is not reasonable, the magnetic isolation structure is intended to increase the reluctance of the magnetic circuit, the magnetic induction intensity decreases in wire, thereby reducing wire loss, but in the actual operation, the lines of force distortion caused by copper wire only, without interrupting the magnetic field lines, that is to say and can not achieve the purpose of increasing reluctance, the concrete analysis for Shanghai Electric Cable Research Institute senior expert Professor Ma Guodong in the "on" single core wire armoured power cable and cable ampacity "works". In the "cable ampacity" Professor Ma Guodong a book through a lot of experiments prove that the single core cable with copper wire and steel wire armored isolation structure can reduce the current carrying capacity of cables (Note: low water cable not on the table), but because the steel wire armored cable can withstand large tensile stress, the application is still very wide.

因此，对于单芯电缆，我们不能够使

So for a single core cable, we can't make it