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江蘇春晨電纜有限公司

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商鋪產(chǎn)品：83條

所在地區(qū)：江蘇淮安市

聯(lián)系人：趙禮春（經(jīng)理）

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產(chǎn)品簡介

防護等級	IP40	護套材質(zhì)	橡膠
絕緣厚度	1.2	外表材質(zhì)	乙丙橡膠
線芯材質(zhì)	紫銅線	芯數(shù)	1
顏色	黑色	應(yīng)用范圍	電力系統(tǒng)

江蘇春晨電纜有限公司生產(chǎn)JHXG電機引接線，1．交流額定電壓：U0/U 0.6/1KV

zui高工作溫度： 180℃

zui低環(huán)境溫度：固定敷設(shè)-60℃，公司：http://m.liuyangwu.com/st82365/

2．電纜安裝敷設(shè)溫度應(yīng)不低于-25℃。

3．電纜允許彎曲半徑：電纜zui小為電纜外徑的10倍

詳細介紹

公司：http://m.liuyangwu.com/st82365/

江蘇春晨電纜有限公司生產(chǎn)JHXG電機引接線，1．交流額定電壓：U0/U 0.6/1KV

zui高工作溫度： 180℃

zui低環(huán)境溫度：固定敷設(shè)-60℃

2．電纜安裝敷設(shè)溫度應(yīng)不低于-25℃。

3．電纜允許彎曲半徑：電纜zui小為電纜外徑的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電機引接線

案例一：我們協(xié)助客戶處理至少四次單芯鋼帶鎧裝電纜事故——電纜是由其他廠家生產(chǎn)，長度較短，故障時間約在 3 至 5 年；故障現(xiàn)象是擊穿。

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：我們協(xié)助客戶處理至少一次單芯鋼帶鎧裝電纜事故——電纜是由其他廠家生產(chǎn)，長度約 500 米，故障現(xiàn)象先有有有有 N 線擊穿，更換后，電機不能啟動，線路壓降大；建議客戶改用 3+2 電纜，問題解決。

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：上述案例可見，在交流線路中采用鋼帶鎧裝電纜，至少會縮短電纜的使用壽命。采用鋼帶鎧裝單芯電纜的原因是：由于采購員對設(shè)計圖紙上電纜型號規(guī)格的理解錯誤，并主觀更改了型號規(guī)格。當(dāng)鋼帶鎧裝單芯電纜在長度短，通過的實際電流比電纜本身的zui大載流量小得多時，電纜壽命在打折扣；當(dāng)長度較長時或電流接近電纜的zui大載流量量，故障立刻表現(xiàn)。處理辦法采購時，提供設(shè)計方案中一樣寫法的型號規(guī)格即可。在交流線路及頻繁啟停的直流線路中，不采用鋼帶鎧裝單芯電纜，不將非磁性鎧裝單芯電纜單獨敷設(shè)在磁性管道中。單根導(dǎo)體周圍如果有閉合的鐵磁材料，流過交流電時的交變磁場會在鐵磁材料中產(chǎn)生渦流問題。多芯電纜由于流入流出電流相等（正常運行時），沒有電磁感應(yīng)問題。渦流問題會造成保護裝置靈敏度下降、電纜發(fā)熱、線損增大、壽命縮短，嚴(yán)重時有可能引發(fā)火災(zāi)。如果需要單芯鎧裝電纜用于交流系統(tǒng)，可以采用不銹鋼、銅、鋁合金等非鐵磁材料鎧裝或采取了防止渦流措施的鋼帶。同樣道理，應(yīng)避免單芯線纜單獨穿鋼管以及使用閉合的鐵磁材料電纜夾具等。單芯鋼帶鎧裝電力電纜在使用上存在著很大的局限性，在結(jié)構(gòu)上也不合理，具體分析如下。

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《電磁場》可知，當(dāng)鋼帶鎧裝單芯電纜正常運行時，導(dǎo)體上會通過很大的交變電流（頻繁啟停的直流電纜線路也相當(dāng)于是通過交變電流），這樣在電纜周圍會產(chǎn)生很大的交變電磁場，而鎧裝用鋼帶具有良好的導(dǎo)磁性能，在運行中，鋼帶和導(dǎo)體類似于電流互感器的主副線圈，當(dāng)有交變的電磁場穿過鋼帶時，就會感應(yīng)出交變電流，而鋼帶本身具有比較大的電阻，引起自身發(fā)熱，從而在鋼帶中形成渦流損耗和磁滯損耗，于是在很短的時間內(nèi)，鋼帶就會產(chǎn)生較高的溫度，再加上導(dǎo)體在正常運行時產(chǎn)生的熱量，如果熱量無法及時散發(fā)出去（如埋地敷設(shè)等），就會導(dǎo)致電纜絕緣層融化或加速老化，破壞電纜的絕緣性能，從而造成電纜擊穿或提前報廢。

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，國內(nèi)有不少企業(yè)對單芯電纜鎧裝采用鋼絲鎧裝加銅絲隔離結(jié)構(gòu)，其實這種“隔磁”結(jié)構(gòu)也是不合理的，隔磁結(jié)構(gòu)的目的是要增大磁路的磁阻，減小鋼絲中的磁感應(yīng)強度，從而減小鋼絲損耗，可是在實際運行當(dāng)中，銅絲只能引起磁力線的畸變，而不會中斷磁力線，也就是說并不能達到增大磁阻的目的，具體分析詳見上海電纜研究所專家馬國棟教授所著論文《單芯鋼絲鎧裝電力電纜鎧裝結(jié)構(gòu)的探討》及著作《電線電纜載流量》。在《電線電纜載流量》一書中馬國棟教授通過大量試驗證明單芯電纜采用鋼絲鎧裝加銅絲隔離結(jié)構(gòu)會降低電纜的載流量（注：水低敷設(shè)電纜不在討論之列），但是由于鋼絲鎧裝電纜能夠承受很大的拉應(yīng)力，目前應(yīng)用仍然很廣泛。

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，對于單芯電纜，我們不能夠使

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

關(guān)鍵詞：電力電纜互感器

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