江蘇春晨電纜有限公司：http://www.gd5688.cn/st82365/

 二 : 電機繞組引接軟電纜 生產執行標準： JB6213.4-92

 三:   電機繞組引接軟電纜 使用條件JE電機引接線

        1 連續運行導體zui高溫度為180℃；JE電機引接線

        2 電纜（電線）的額定電壓為500V,1000V；

        3 敷設時的允許彎曲半徑應不小于電纜（電線）外徑的4倍,

The scientific way of laying the insulated power cables in developed countries

2011年中國電線電纜總產值超越美國而成為世界*大電線電纜制造國，但不得不清醒的認識到，我國的電纜產能已嚴重過剩。據不*統計，如果中國所有的電纜企業全面開工，可以滿足整個亞洲、大洋洲的需求。在電纜產能嚴重過程的同時，由于XLPE絕緣電力電纜敷設不當而造成電纜擊穿占了電纜運行故障的相當大一部分比例，因此全面了解、認識XLPE電力電纜科學的敷設方式迫在眉睫。本文先介紹了中壓XLPE絕緣電力電纜的三種主要陸地安裝敷設方式。

In 2011, the total output value of China's wire and cable has surpassed the United States to become the world's largest wire and cable manufacturing country, but had to be clearly aware that China's cable production capacity has been a serious surplus. According to incomplete statistics, if all the cable companies in China to start a comprehensive, can meet the needs of the whole of Asia, Oceania. In the cable capacity serious process at the same time, because the XLPE insulated power cable laying cable breakdown caused by improper operation of the cable fault accounted for a very large proportion, so the comprehensive understanding of XLPE power cable laying scientific imminent. This paper first introduces the three main types of land installation of medium voltage XLPE insulated power cable.

我國現階段電纜工程設計主要參照GB 50217-2007與DL/T 5221-2005等相關標準，DL/T 5221-2005要求所敷設XLPE絕緣中壓電力電纜的zui小彎曲半徑，單芯為12D，三芯為10D（D=電纜實測外徑），但不同廠家針對不同種類的中壓電纜的彎曲半徑略有不同。理論上來講，6根及以下采用直埋的敷設方式，16根及以下采用隧道的敷設方式，21根及以下采用排管或電纜溝的敷設方式。但以上所述數據均為理想狀態下，施工中應根據不同的產品要求及真實的地理及相關環境而定。本文主要討論了直埋敷設、排管敷設與隧道敷設等三種陸地敷設方式。

At the present stage of China's cable engineering design mainly refers to the GB 50217-2007 and DL/T 5221-2005 standards DL/T 5221-2005 requirements for the minimum bending radius of XLPE insulated power cable, 12D single core, three core 10D (D= cable diameter, measured) but different manufacturers for medium voltage cable bending radius of different types of slightly different. In theory, the 6 root and below by way of laying buried, 16 and below using the tunnel laying mode, 21 and below by way of laying pipe or cable channel. But the data are ideal, the construction should be based on different requirements of the product and the real geography and related environment. This paper mainly discusses the buried laying, pipe laying and tunnel laying three land laying mode.

2.三種中壓XLPE絕緣電力電纜陸地敷設方式

Three 2 kinds of medium voltage XLPE insulated power cable laying mode

2.1 直埋敷設

2.1 buried

。

China is currently used widely is laying buried buried, because has the advantages of low cost, simple installation procedure and obvious. The construction units in the selection of directly buried before, must understand the attributes of products and suppliers such as cable, sheath type (whether termite, insects and other functions), bending radius of the cable supplier recommendations (such as whether armored etc.) etc.. The can be buried, should be carried out on-site investigation and verification in accordance with the construction design, determine the trend of cable, to avoid the high temperature area (such as the city heating system and factory), poor soil or rocky areas (such as debris flow prone area etc.). In general, the buried depth of XLPE insulated power cables should be in the frozen soil layer below, North and South are different. Cable laying should be in the cable channel laying 100-120mm thickness of fine sand, and then covered with cement or concrete protection cover plate, it is recommended that the width of the cover plate is better than the diameter of the cable 100-120mm. And then fill in the backfill, backfill to respond to the cable sheath without corrosion, backfill process is best to add a layer of color Mini warning. After the end of the backfill, it is recommended in the cable joints, bending, or with other lines at the intersection to do warning, to prevent man-made damage.

XLPE絕緣電纜直埋敷設方式僅適用于無或少白蟻、遠離熱源、地勢平坦、交通不密集、無酸堿或化學品腐蝕、無地下作業等地帶。所以選擇直埋敷設前一定要做好地理勘測。一般情況下10kv及以下且帶有鎧裝層的電纜可因實際敷設情況選擇直埋敷設。

XLPE insulated cables directly buried installation is only suitable for less or no termites, far away from heat, flat terrain, traffic is not dense, without acid-base or chemical corrosion and no underground zone etc.. So the choice must be well buried before the geographical survey. General 10kV and cable and with armored layer can be due to the actual choice of directly buried laying.

2.2 排管敷設

2.2 row pipe laying

The so-called row of pipe laying is when the cable put a number of more for a long time, the cable is installed in a secure underground orderly arrangement of the underground pipeline in the way. Pipe laying for tube diameter is greater than or equal to 1.5 times the actual diameter of cables, the same laying depth in the permafrost below the discharge pipe to work well should be greater than 0.2% slope direction, and the gap between each row of pipe should be more than 20mm, so as to ensure good heat dissipation. When installing the cable, make sure the entrance of the row of pipes is smooth, no sharp point in the tube or debris, so as not to be scratched when the cable installation. XLPE insulated cable working temperature is 90 DEG C, selection of pipe material, to select materials with good mechanical properties, thermal performance, the main pipe material is vinylon cement pipe, double wall corrugated pipe, plastic pipe, flame retardant PVC-C and fusion PE drawing etc..

Exhaust pipe laying the advantages of easy maintenance, and other cable reserved space, small occupied area, the cable well can be adjusted to a larger space, has good fireproof performance, strong mechanical resistance, generally applicable to the cross line more, such as highway and railway traffic in busy areas, this is not recommended with the installation of armoured cable the way. Pipe laying has obvious shortcomings, compared with buried pipe laying, installation of high cost, poor heat dissipation, easy to cause the XLPE insulated cables of long service life of small (usually XLPE insulated cables for the design life of 30 years, according to statistics, if the pipe laying properly, will make the service life of the cable XLPE reduce 35%--40%). In addition, the transfer pipe laying head more, there Water Leakage, small animal bite intrusion and other hazards, the maintenance cost is high.

2.3隧道敷設

2.3 tunnel laying

The so-called cable tunnel laying, generally refers to accommodate 21 or more of the cable sites, and equipped with the detection and maintenance of the channel, in a fully enclosed tunnel in the laying of cables. The number of cables can change at any time in the tunnel, without the two ground breaking work, resistance to mechanical performance is very strong, and the detection and maintenance is very convenient. When laying the tunnel, first of all, to understand the voltage level of the cable, cable diameter and insulation material properties, and then to determine the distance between the arrangement of the cable. The lighting system and drainage system are used in the cable tunnel, and the double ventilation system of mechanical ventilation and natural ventilation is adopted to reduce the air humidity in the tunnel,