Mineral insulated cable (MI cable) is a cable with a copper conductor core wrapped in a copper sheath and magnesium oxide powder as an inorganic insulating material to isolate the conductor and sheath. The mineral cable can become MICC cable (Mineral Insulated Copper Clad Cable) or MI cable (Mineral Insulated Cable).
ZMS mineral insulated cables have the advantages of high temperature resistance, large current carrying capacity, corrosion resistance, smokeless and non-toxic, anti-electromagnetic interference, long service life, economy and environmental protection. It is currently the most safe and environmentally friendly fireproof cable with high cost performance. It is suitable for emergency lighting systems and fire alarm systems in the oil, natural gas and petroleum industries, airports, power and control circuits, and provides circuit integrity of 950°C.
Conductor: The conductor is made of the first high-quality annealed copper in accordance with GB/T3956.
Insulation layer (magnesium oxide): high temperature resistant, non-combustible inorganic magnesium oxide powder.
Metal sheath: Use high-quality annealed copper as the sheath.
Outer protective layer (optional): when there are requirements for corrosion protection, identification or aesthetics, a plastic coat can be used (halogen-free low-smoke coat is recommended).
Standard: GB/T34926; IEC60702; BS6387:1994; GB/T13033.1.2-2007, etc.
|Type||Rated Voltage||Model||Name||Core||Section (mm²)|
|Lightweight||500V||BTTQ||Lightweight copper core copper sheathed mineral insulated cable||1 / 2 / 3 / 4 / 7 / 12 / 19||1.0~4.0|
|Lightweight copper core copper sheath LSZH outer sheathed mineral insulated cable|
|BTTVQ||lightweight copper core copper sheathed PVC outer sheathed mineral insulated cable|
|Heavy-duty||750V||BTTZ||Heavy-duty copper core copper sheathed mineral insulated cable||1||1~400|
|2 / 3 / 4||1~25|
|WD-BTTTZ||Heavy-duty copper core copper sheathed LSZH outer sheathed mineral insulated cable||1||1~400|
2 / 3 / 4
|BTTVZ||Heavy-duty copper core copper sjeathed PVC outer sheathed mineral insulated cable||1||1~400|
|2 / 3 / 4||1~25|
Note: Multi-core cables with section over 25 mm² are replaced by single-core cables.
Mineral Insulated Cables Have a Wide Range Of Application Scenarios
1. It is suitable for industrial and civil buildings and other fire protection systems, such as detection and alarm systems, fire extinguishing systems, ventilation and air conditioning systems, emergency lighting, life-saving systems and other cable wiring.
2. It is suitable for cable wiring used in industrial, civil, national defense and other harsh environments such as high temperature, corrosion, and nuclear radiation.
3. It is suitable for cable wiring used in industries, civil buildings and other occasions where the safety of human life and property must be guaranteed. Such as public buildings, subway stations, parking lots, gas stations, hotels, shopping centers and other production facilities.
Key features and advantages
● Strong Fire Resistance
Mineral insulated cables are all composed of inorganic substances (copper and magnesium oxide). It does not ignite on its own, nor does it cause a source of ignition.The cable works well even with an external source of ignition.
● High Temperature Resistance
Because the melting point temperature of magnesium oxide in the insulating layer is much higher than that of copper, the maximum normal temperature of mineral insulated magnesium oxide cable can reach 250℃, and it can continue to run at 1083°C, which is close to the melting point of copper, in a short time.
● Large Current Carrying Capacity
Because of the special insulating material and structure of magnesium oxide cable, the mineral insulated cable has great current-carrying capacity. Compared with traditional plastic cables, the same amount of current can be reduced by 1 to 2 cross-section levels.
● Resistance To Radiation
Because the cable is composed of inorganic materials. Therefore, after undergoing nuclear radiation, the electrical and mechanical properties of the cable will not change in any way.
● Waterproof And Explosion-Proof Performance
Mineral insulated cables use copper tubes as sheaths. The highly compacted insulating materials in the cables and the cable terminations installed with special sealing sleeves can organize the water vapor, gas and flame to be immersed in the electrical equipment connected to the cable. Therefore, it is suitable for the connection of various explosion-proof equipment and equipment in places with explosion hazard.
● Safety And Environmental Performance
The cable's constituent materials are all inorganic materials and do not contain any organic materials. Therefore, even if the cable is placed in a fire above 1000°C or in a flame that is destructive to copper, it will not produce the slightest amount of smoke, halogen and toxic gases. This cable is a product that can truly achieve green, environmental protection and safety.
● High Mechanical Strength
The cable has the characteristics of high strength and high toughness, and can withstand bending, flattening, twisting and other conditions. When the cable is flattened to 1/3~2/3 of the original cable outer diameter, it can still operate normally.
● Good Bending Performance
After the cable is fully annealed, it can be bent repeatedly and many times, and has a bendability that ordinary plastic cables cannot compare.
● Excellent Shielding Performance
The cable copper sheath is the most excellent shielding protection layer, which can prevent the cable itself from interfering with other cables, and it can also prevent the external magnetic field from interfering with itself.
● Good Grounding Performance
The copper sheath of the mineral copper-clad cable can function as a grounding wire, and has a very low grounding resistance, without the need for a separate grounding wire.
Mineral Insulated Copper Clad Cable (MICC Cable) Accessories
MICC Cable Termination
When the MICC cable is installed and used, a permanent termination is required to connect the cable to the electrical equipment.
The termination serves two purposes:
1. The cable insulation material (magnesium oxide) is isolated from the outside world for sealing purposes.
2. Connect the cable to the switch cabinet or electrical equipment for fixing.
Therefore, the termination consists of two parts:
Sealing part: Generally composed of copper tank (or heat shrinkable casing), tank cover, sealing material and conductor insulating casing.
Gland part: Generally consists of gland body, compression ring and gland nut.
When the cable length is not long enough, it is necessary to use the intermediate connector accessory. It is a device that connects two cables of the same specification into one cable. Cable does not need), heat shrinkable tubing, intermediate connecting terminal, fireproof porcelain column.
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