Mineral Insulated Cable Intruction

According to the development history of mineral insulated cables in the world, the authoritative data promulgated by the Ministry of Public Security - the latest version of the "China Fire Manual" in December 2007, the domestic mineral insulated cable products were divided into two categories:

1. Rigid mineral cable. Mainly refers to BTTZ heavy-duty copper-core copper sheathed cable, with copper rod as conductive core ˴ magnesium oxide filler for insulation ˴ copper tube for sheathing, after many high-temperature drawing cables.

2. Flexible mineral insulated cable. Mainly refers to BBTRZ flexible mineral insulated fireproof cable, with copper stranded wire as the wire, inorganic mineral and mineral compound as the insulation and sheath.

  These two mineral insulated cables, mainly honouring the British BS6387 standard, meet the fire protection requirements of the special pole building, that is, 180mm uninterrupted power supply under fire conditions, Kang spray ˴ anti-impact performance.

Advantages of  BBTRZ  flexible mineral insulated protective cable

Because BBTRZ flexible mineral insulated fireproof cable has achieved a qualitative breakthrough in material research, it has more advantages in terms of electrical performance, safety, energy saving, ease of construction and economy. The main conclusions are as follows:

Electrical performance

Large current carrying capacity: Under the same conditions, the BBTRZ cable has a larger current carrying capacity. The rated current carrying capacity of the conductor operating temperature of 90 °C is basically equivalent to the current carrying capacity of the BBTRZ cable operating temperature of 125 ° C, which is much higher than other cables.

High withstand voltage rating: BBTRZ cable complies with international GB/T12706 standard and withstand voltage rating of 1000V; while BBTRZ cable complies with international GB/T13033 standard, withstand voltage rating of 750V, and withstand voltage (4-6 times of conventional voltage) Poor, seriously affecting the service life.

2. Security

The material has good insulation. BBTRZ cable is made of inorganic non-metallic material as insulation sheath, and has multi-layer insulation protection structure. It is fireproof and waterproof, so it has excellent insulation performance.

The line reliability is high. The multi-core structure of BBTRZ cable can be 300mm2, and can be customized for continuous large length (in theory, it can be infinitely long). It does not need intermediate joints, so the cable has good integrity and overcomes the defects of single single core.

Grounding is safer. The BBTRZ cable uses a special grounding wire to reduce safety hazards.

3. Energy saving

Due to the inorganic and non-metallic insulation and sheath structure of the BBTRZ cable, only the three main lines have a small capacitive current to the ground line, and the value is in the range of several to ten mA, which is basically negligible.

Less reactive power loss. The BBTRZ cable has a large current carrying value, the wire has a low heat generation, and the multi-core large-section structure completely offsets the electromagnetic effect. Because the thermal field, magnetic field and other reactive losses are much lower than products such as BTTZ.

4. Easy construction

The BBTRZ cable is flexible and has a minimum bending radius of 6D, which is basically the same as the ordinary cable laying process, so the construction is very simple, effective and reliable. At the same time, BBTRZ cable can be laid in the same slot as ordinary cable, saving space and easy maintenance. It is suitable for various laying methods.