进入公司商铺 江苏春晨电缆有限公司专业生产EV-VV充电桩电缆，
聚氯乙烯绝缘聚氯乙烯护套电动汽车传导充电系统用电缆，

A brief introduction of Magnesium Oxide cable:

铜芯铜护套氧化镁绝缘防火电缆(以下简称氧化镁电缆)，是一种外层采用无缝铜管护套、中间充填氧化镁晶体粉作绝缘材料、以单股铜棒作为导体的新型电缆。它不但能耐高温、防火、防爆、阻燃，而且载流量大、外径小、机械强度高、使用寿命长、一般不需要独立接地导线。因此，氧化镁电缆被广泛应用于危险、恶劣、高温的环境中，如核电站、冶金、化工、矿井、制窑等。近年来，随着各种技术工艺的蓬勃发展，氧化镁电缆也较多的应用于高层楼房、机场、码头、地铁等民用建筑，用以保障在火灾情况下消防水泵、消防电梯、局部照明、应急疏散指示、保安监视、防烟排烟系统、自备电源等消防用电及重要设备的不间断运行。EV-VV充电桩电缆

Copper core copper sheath insulation fireproof cable (hereinafter referred to as Magnesium Oxide, Magnesium Oxide cable) is a outer layer made of seamless copper sheath, intermediate crystal powder filling Magnesium Oxide as insulating material, single strand copper as a new type of cable conductor. The utility model not only has the advantages of high temperature, fire prevention, explosion prevention, flame retardance, but also has the advantages of large carrying capacity, small external diameter, high mechanical strength, long service life, and no need of an independent grounding conductor. Therefore, Magnesium Oxide cable is widely used in dangerous, harsh, high temperature environment, such as nuclear power plants, metallurgy, chemical industry, mine, kiln, etc.. In recent years, with the rapid development of various technologies, Magnesium Oxide cable is also more used in high-rise buildings, airports, terminals, subway and other civil buildings, in order to ensure uninterrupted operation in case of fire fire pumps, fire elevator, local lighting, emergency evacuation signs, security monitoring, smoke exhaust system, power supply etc. fire power and important equipment.

氧化镁电缆的构造与型号规格：

Construction and model specification of Magnesium Oxide cable:

氧化镁防火电缆制造工艺比较复杂。主要有两种方法，一是先在外层的无缝铜管与核心的铜芯导体之间灌入氧化镁晶体粉，然后进行压实；二是先将氧化镁粉压制成空心的圆柱，将它穿入导体和铜管之间，然后通过拉拔——退火——再拉拔等多道工序循环反复进而制成电缆。需要注意的是，在氧化镁电缆的加工过程中需要不断检测氧化镁的密实性和铜管的气密性等项目。通过对氧化镁电缆制作过程和方法的了解，我们可以看出电缆的结构主要由三部分组成：外层的无缝铜管护套、中间起绝缘作用的氧化镁晶体粉、核心作为导体的铜棒。

Magnesium Oxide fire cable manufacturing process is more complex. There are two main methods, one is between the first and the outer core in a seamless copper copper conductor into Magnesium Oxide crystal powder, and then compaction; two are first pressed into magnesium oxide hollow cylinder, it penetrates into the conductor and then by drawing, brass, annealing -- drawing procedures of circulation then repeatedly made cable. It should be noted that, in the process of the Magnesium Oxide cable needs to continue to detect the tightness of Magnesium Oxide and copper tightness and other projects. Through the process and methods of production of Magnesium Oxide cable, we can see that the cable structure is mainly composed of three parts: a seamless copper sheath, the outer layer of the intermediate isolation function of Magnesium Oxide crystal powder, copper as the core conductor.

氧化镁电缆的型号可以分为BTTQ 轻型电缆（500V 级）和BTTZ 重型电缆（750V级）两种，凯宾斯基项目主要为BTTZ 重型电缆。其规格主要有单芯、二芯、三芯、四芯、七芯、十二芯等。单芯至四芯的氧化镁电缆主要用于动力、照明，七芯以上的主要用于通讯、控制。单芯电缆线zui大截面可达4002ｍ㎡，二芯至四芯电缆芯线zui大截面为25ｍ㎡。

Magnesium Oxide cable types can be divided into BTTQ light cable (500V) and BTTZ (750V) heavy cable two, Kempinski mainly for BTTZ heavy cable. The main specifications are single core, two core, three core, four core, seven core, twelve core, etc.. Single core to four core Magnesium Oxide cable is mainly used for power, lighting, more than seven core for communication, control. The maximum cross section of single core cables up to 4002m square meters, the largest section of the two core to four core cable for 25m square meters.

二、氧化镁电缆的优点

Two, the advantages of Magnesium Oxide cable

1、*防火

1, complete fire

氧化镁电缆自身*不燃烧，250℃时可连续长时间运行，1000℃极限状态下也可以保持30 分钟的正常运行，同时还不会引发火源。即使在有火焰烧烤的情况下，只要火焰温度低于铜的熔点温度，火焰消除后电缆无需更换仍可继续使用。在被火焰烧烤的情况下不会产生有毒的烟雾和气体。

The Magnesium Oxide cable is compley non burning at 250 DEG C, and can run continuously for a long period of time at a temperature of 30 DEG C, and the normal operation of the utility model can be maintained at the limit of 1000 DEG C, and the ignition source can not be generated. Even in the case of flame barbecue, as long as the flame temperature is lower than the melting temperature of copper, the flame after the elimination of the cable without replacement can continue to use. No toxic fumes and gases will be produced in the case of a flame grill.

2、过载保护能力强

2, overload protection ability

线路过载时，只要发热达不到铜的熔点温度，电缆不会受损。即使瞬间击穿，击穿处氧化镁晶体也不会形成碳化物，过载消除后，电缆性能不会产生变化，仍可继续正常使用。

When the line is overloaded, the cable will not be damaged as long as the heating temperature can not reach the melting temperature of copper. Even if the instantaneous breakdown, the breakdown of Magnesium Oxide crystals will not form carbide, after the elimination of overload, the performance of the cable will not change, can continue to use normal.

3、工作温度高

3, high working temperature

4、防腐、防爆性能好

4, anti-corrosion, explosion-proof performance is good

由于采用无缝铜管作护套，所以氧化镁电缆具有防水、潮气、油和一些化学物质侵害的性能，铜管具有相当的机械强度故有较好的防爆性能。

As a result of the use of seamless copper pipe as a sheath, so Magnesium Oxide cable with waterproof, moisture, oil and some chemical substances against the performance of brass with considerable mechanical strength, so there is a good explosion-proof performance.

5、使用寿命长

5, long service life

氧化镁电缆全部由无机材料构成，因而不存在绝缘老化，使用寿命可达到普通电缆的3 倍以上。

Magnesium Oxide cable is made up of inorganic materials, so there is no insulation aging, the service life can reach more than 3 times the ordinary cable.

6、敷设灵活性较大

6, laying more flexibility

氧化镁电缆可以与普通电缆敷设在桥架上，同时也可以采用支架明敷，比普通电缆敷设更具灵活性，也节省了电缆桥架的投入，可以降低工程整体造价。

Magnesium Oxide cable and ordinary cable laying on the bridge, at the same time also can use special support surface, more flexible than ordinary cable laying, cable tray also saves investment, can reduce the overall cost of the project.

三、氧化镁电缆的缺点

Three, Magnesium Oxide cable shortcomings

事物都具有两面性，氧化镁电缆也不例外，具有众多优点的同时，也存在着一些缺点，应该在选择和施工时加以注意。

Everything has two sides, Magnesium Oxide cable is no exception, with many advantages, but also has some shortcomings, should be in the selection and construction of attention.

1、投资成本高

1, high investment costs

由于氧化镁电缆外护套是由无缝铜管构成，整体含铜量远多于普通电缆，同时氧化镁电缆的施工工艺对设备要求高于普通电缆，造成氧化镁电缆价格与普通电缆相比高出30％左右。

Because Magnesium Oxide cable sheath is composed of seamless tube, the overall amount of copper is far more than the ordinary cable, and construction technology of Magnesium Oxide cable equipment requirements higher than the ordinary cable, causing Magnesium Oxide cable prices compared with ordinary cable around 30% higher.

2、接头处易受潮

2, easy to damp at the junction

绝缘层由矿物氧化镁组成，它极易与空气中的水分发生化学反应，而生成能导电的*。在电缆头施工中,电缆端头剥开裸露导体时，电缆的绝缘电阻一般在10MΩ以上，但如在1小时内未完成电缆头制作，绝缘电阻可下降到10MΩ以下，甚至会出现降到0.5MΩ以下的况，如不注意划破外层，又未及时发现并作密封防潮处理，绝缘值会很快下降并会逐步下降到0，这样就会造成该电缆无法使用。

The insulating layer is composed of mineral Magnesium Oxide, which is easy to react with the water in the air, and generates the conductive magnesium hydroxide. The cable joint construction, cable end peel exposed conductor, the insulation resistance of the cable in the 10M above, but in 1 hours did not complete the first cable production, the insulation resistance can be reduced to 10M below, there will even be reduced to 0.5M below the condition, such as attention across the outer layer, and not timely detection and sealing moistureproof processing, the insulation value will decline and will gradually decline to 0 soon, this will cause the cable to use.

3、施工难度大

3, construction difficult

氧化镁电缆硬度与一般电缆相比较高，重量约为一般电缆的2 倍，敷设时不易达到平行整洁的观感效果，且线路长、接头多，查找故障点困难，因此施工难度较大，在进出配线箱处和桥架内弯曲成型困难。

Magnesium Oxide cable hardness compared with the general cable high, weighs about 2 times as much as the general cable, not easy to achieve parallel neat impression effect when laying, and long lines, a large number of joints, so difficult to find the point of failure, difficult construction, difficulties in forming bending in the wiring box and tray import.

4、施工工作量较大

4, construction workload is bigger

氧化镁电缆凡规格超过35mm 的均为单芯电缆，如1 根70mm 的电缆，普通电缆只需3×70+2×35

Magnesium Oxide cable specifications are more than 35mm of the single core cable, such as 1 70mm cable, ordinary cable only 3 x 70+2 x 35