Cable is a kind of wire product used to transmit electrical energy, information and electromagnetic conversion. However, due to the shortcomings of power lines, a large number of fires have occurred in society, which have brought personal and economic losses to people. Therefore, insulated cables are becoming more and more popular. Among them, mineral insulated cable is one of the special cut-off cables. So, how much do you know about this special insulated cable?



1. Structure principle

Mineral insulated cables, also known as magnesium oxide cables or fireproof cables, are composed of the mineral material magnesium oxide and the metal material copper. The magnesia insulation material is used to adhere to the seamless copper sheath, forming a tight whole with the metal core and sheath.

Generally speaking, the melting point of magnesium oxide insulation material is as high as 2800 ° C, and the melting point of copper is 1083 ° C, as long as these two temperatures are not reached, the insulation performance of magnesium oxide insulation material will not change significantly, and the cable can continue to run.

2. Performance characteristics

(1) Fire resistance: Mineral insulated cables not only meet the product standards of 950°C and 180 min fire time, but also meet the requirements of national standards, and many fire scenes at home and abroad have fully proved that all cables after the fire, only mineral insulated cables are still intact.

(2) High temperature resistance: Mineral insulated cable can be used for a long time at 250 ° C, the service life can reach 250 years, will not cause and spread fire, is a good product.

(3) Corrosion resistance, mechanical damage resistance: copper has excellent corrosion resistance, in most cases do not need additional protective measures; Unless used in special circumstances, a layer of plastic sheath can be added to the cable. Because the copper sheath of the cable has a certain strength and toughness, the interior of the cable will not change when the cable is bent.

(4) Smoke-free: In the event of a fire, mineral insulated cables do not release any harmful gases and smoke, which is a prerequisite for ensuring the smooth evacuation of personnel under fire conditions, and is an environmentally friendly cable.

3. Scope of use:

According to the excellent characteristics of mineral insulated cables, in addition to the specification requirements for the use of mineral insulated cables in the field of fire fighting equipment, it can also be used in the following fields:

(1) Where the basement needs to cross the fire protection area, the use of mineral insulated cable distribution can more reflect the advantages of fire protection cables.

(2) All elevator, roof and landscape lighting electrical equipment in the elevator room of the building shall be distributed by mineral insulated cable.

(3) Because large stores have distribution channels, etc., it is convenient to lay mineral insulated cables, so the use of mineral insulated cables as distribution trunks is a good choice.

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Qingdao Tianxing Cable Co., Ltd. is a technology enterprise specializing in the production of wire and cable in Shandong Province, with more than 150 sets of domestic excellent cable production equipment and testing equipment, excellent production technology, modern testing equipment, to ensure stable product quality and timely supply. The company's main products are power cable, mineral cable, high life wire and cable, radiation crosslinked cable, control cable, computer cable, photovoltaic cable, communication cable, data cable, low smoke halogen free cable, flame retardant series wire and cable.