Description

Mineral insulated cable, a copper conductor core wire wrapped with a copper sheath.

All materials of this cable are made of inorganic materials, so it has some advantages that other cables cannot have.

1. Fire resistance

The two materials used in mineral insulated cables, copper and mineral insulation, are inorganic. This kind of cable will not burn or support combustion, and it can continue to operate under conditions close to the flame. The copper sheath melted at 1083°C.

2. High operating temperature

Mineral insulated cables can withstand continuous operating temperatures up to 250°C. Moreover, in an emergency, the cable can continue to operate in a short time at a temperature close to the melting point of the copper sheath.

3. Long life

Inorganic materials used in mineral insulated cables can ensure the stability, long life and fire resistance of the cables.

4. Explosion-proof

The highly compacted insulating material in mineral insulated cables prevents steam, gas and flames from passing between the equipment parts connected to the cable.

5. Small outer diameter

The diameter of mineral insulated cables is smaller than other cables with the same rated current.

6. Waterproof

If the mineral insulated cable is completely immersed in water, with its seamless metal sheath, the mineral insulated cable can continue to operate.

7. High mechanical strength

Mineral insulated cables are durable and can withstand severe mechanical damage without compromising their electrical performance.

8. Large current carrying capacity

For cables with the same cross-section, mineral insulated cables transmit higher currents than other types of cables. At the same time, mineral insulated cables can also withstand considerable overloads.

9. Short-circuit fault rating

At the same temperature, the short-circuit fault rating of mineral insulated cables is significantly higher than other types of cables.

10. Ground

For mineral insulated cables, a separate grounding wire is not needed, because the copper sheath used in this cable has already played the role of the grounding wire and can provide good low grounding resistance. As far as ESR wiring is concerned, in the MEN (Multi-Earth Neutral) system, the outer copper sheath can be used as a ground and neutral conductor.

11. High corrosion resistance

The copper sheath of mineral insulated cables has high corrosion resistance. For most devices, it does not require additional protective measures. Where the copper sheath of the cable is susceptible to chemical corrosion or serious industrial pollution, a plastic outer sheath should be used to protect the mineral insulated cable.

Mineral insulated cables have been widely used in high-rise buildings, petrochemicals, airports, tunnels, ships, offshore oil platforms, aerospace,

Steel metallurgy, shopping malls, parking lots and other occasions.

1. High-rise buildings

General lighting, emergency lighting, fire alarm, fire-fighting electrical wiring, emergency elevator and lifting equipment wiring, computer room control wiring,

Trunksub-dry distribution system lines, dual power control lines

2. Oil platform

General lighting, emergency lighting, potentially dangerous explosion area line

3. Airport terminal

General lighting, emergency lighting, fire monitoring system, fire alarm system

4. Warships and ships

Generator room transmission lines, fire monitoring systems, fire alarm systems, smoke emission and ventilation lines, kitchen power lines, large power lines

Circuit, dual power supply control circuit, emergency lighting, emergency broadcast circuit, computer room control circuit

5. Chemical industry

General lighting, emergency lighting, potentially dangerous explosive lines and other places

6. Subway tunnel

General lighting, emergency lighting, fire monitoring system, fire electrical wiring, smoke emission and ventilation wiring

7. Iron and Steel Metallurgy

High temperature environment power and control lines, emergency power supply, large power lines, power supply lines that cannot be cut off, power transmission lines in the generator room

8. Power plant

Large power lines, general lighting, emergency lighting, fire alarm, fire-fighting electrical lines

9. Aerospace

General lighting, emergency lighting, computer room control lines, large power lines, high-temperature environment power and control lines, potentially dangerous explosive areas

Domain line

10. Department stores

General lighting, emergency lighting, emergency broadcasting, emergency elevator and lifting equipment wiring

11. Libraries, museums, data processing centers

Fire alarm control circuit, fire electrical circuit

12. Nuclear power plant

General lighting, emergency lighting, computer room control lines, large power lines, high-temperature environment power and control lines, potentially dangerous explosive areas

Domain line

13. Parking lot

General lighting, emergency lighting, fire alarm, smoke emission and ventilation lines

14. Places of interest

General lighting, emergency lighting, fire alarm, fire-fighting electrical wiring

1. Fire prevention

Since the cables are all made of inorganic substances (metallic copper and magnesium oxide powder), it will not cause fire, and cannot burn or support combustion. Since the melting point of copper is 1083°C, the mineral insulation layer is also above 1000°C. Therefore, this kind of cable can continue to maintain power supply under fire conditions close to the melting point of copper, and is a true fire-proof cable. And can pass BS6387 C, W, Z test.

2. Large current carrying capacity and waterproof

Since the actual normal operating temperature of mineral insulated cables can reach 250°C, IEC60702 stipulates that the continuous working temperature of mineral insulated cables is 105°C. This is because of the need for terminal sealing materials and safety. Even so, its current carrying capacity far exceeds other cables. , Because mineral insulation has a better thermal conductivity than plastic, so the same working temperature, the current capacity is greater. For lines above 16mm2, one section can be reduced, and for places where human contact is not allowed, two sections can be reduced.

Three, explosion-proof and corrosion-resistant

Explosion-proof characteristics: Since mineral insulated cables use metal sheaths as a protective layer, flammable gas, oil vapor, and flames cannot reach the electrical equipment connected to the cable, so the cable has explosion-proof characteristics.

Corrosion resistance: Because copper has good corrosion resistance, it does not need any additional protection under normal use environment. Under special environmental conditions, such as an environment with strong corrosion to copper, the outside of the cable Add a layer of PVC outer sheath, so the cable has good corrosion resistance.

4. Resistance to mechanical damage, long life, halogen-free and non-toxic

Resistance to mechanical damage: Because the metal sheath of the cable has certain strength and toughness, the relative position between the core wires and between the core wire and the sheath remains unchanged when the cable undergoes bending, flattening, torsion and other deformations. No short circuit will occur, nor will it affect electrical performance.

Long lifespan: Since the materials used in the cables are all inorganic materials, they will not age. Its service life can be calculated according to the rate of oxidation and corrosion of the copper sheath. According to the data, it takes 257 years for the sheath to oxidize to 0.25mm at an ambient temperature of 250℃, while the sheath thickness of mineral insulated cables is generally between 0.34-1.05, and the service temperature is lower than 250℃, so the cable has Features of long life.

Halogen-free and non-toxic: Because the cables are all made of inorganic materials (metallic copper and mineral insulation), they will not produce smoke, halogen and toxic gases even if they burn at a high temperature of 1000 ℃. It is truly halogen-free and non-toxic cable.

Five, overload resistance, copper sheath can be used as grounding wire

Overload resistance: Since the melting point of copper is 1083°C and the melting point of mineral insulation is above 1000°C, compared with ordinary plastic cables, the current carrying capacity of mineral insulated cables can be increased by one cross-sectional level, while being able to withstand considerable overloads. The capacity can reach more than 10 times the normal carrying capacity.

The copper sheath can be used as a grounding wire: for mineral insulated cables, due to the continuity of the copper sheath and extremely low grounding resistance, it can be used as a grounding wire without a separate grounding wire.

6. Product use: Due to the excellent performance of mineral insulated cables, it is suitable for fire protection and the following lines with a rated voltage of 1000V and below:

• General lighting
• Emergency lighting line ·Emergency broadcasting line
• Emergency elevator and lifting equipment wiring
• Fire alarm control circuit
• Computer room control circuit
• Fire electrical wiring
• Power transmission line in generator room
• Power supply lines that cannot be cut off
• Dual power supply control circuit
• Public place lighting circuit
• Main/sub-dry distribution system lines
• Lighting line of historical sites
• High temperature environment power and control circuit
• Oil Pump Line
• Lines in potentially hazardous explosive areas

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