The intermediate connector of mineral cable is adopted, and the cable terminal head is used as the terminal. The terminal head is provided with a connecting terminal, which can be connected with the connecting terminal of the bus and the equipment.
The continuous working temperature of mineral cable is 250℃, and it can supply power for 3 hours at 950℃- 1000℃. It can work near the melting point of copper 1083℃ in a short time or in an extraordinary period. Mineral insulated cable has excellent performance and is suitable for lines with rated voltage below 1000VV.
Extended information:
Main performance:
(1) fire resistance
Because mineral cables are all made of inorganic substances, they will not cause fire, combustion or combustion, and will not produce toxic gases. Even if there is external flame burning, the cable can still work normally. After the fire is cleared, there is no need to replace the cable. This is a real fire-proof cable, which provides a foolproof guarantee for the fire-fighting circuit and has passed the IEC33 1 test.
(2) High current carrying capacity
Since the normal working temperature of mineral insulated cables can reach 250℃, IEC60702 stipulates that the continuous working temperature of mineral insulated cables is 105℃. This is in consideration of terminal sealing materials and safety requirements. Even so, its cross-sectional flow is much higher than other cables, because the conductivity of magnesium oxide powder is better than that of plastic.
Therefore, at the same working temperature, the cut-off flow is larger. /kloc-lines over 0/6mm can be reduced by one section, and places where people are not allowed to touch can be reduced by two sections.
(3) Waterproof, explosion-proof and corrosion-resistant.
Because the cable sheath made of low smoke, halogen-free and high flame retardant materials has high corrosion resistance (plastic sheath is only needed in the case of individual chemical corrosion), the conductor, insulation and sheath are tightly pressed. Therefore, it can not only prevent the invasion of water, moisture, oil and some chemicals, but also be used for the connection of places with explosion danger and various explosion-proof equipment.
(4) overload protection
When the line is overloaded, the insulation of plastic cable will be heated or broken down due to overcurrent or overvoltage. As for mineral insulated cables, as long as the heat does not reach the melting point of copper, it will not damage the cables. Even if the breakdown occurs instantaneously, magnesium oxide will not form carbide at the high temperature of the breakdown point. After the overload is relieved, the cable performance will not change, and it can still be used normally.
(5) High working temperature
Because the melting temperature of magnesium oxide in the insulation layer is much higher than that of copper, the highest normal working temperature of the cable can reach 250℃, and it can continue to run at 1083℃ close to the melting temperature of copper in a short time.
(6) Strong shielding performance.
Copper cable sheath is the best shielding layer, which can prevent the cable itself from interfering with other cables and the external magnetic field from interfering with itself.
(7) Long service life
Because the cable is an inorganic material, it will not age and its service life will be at least 100 years. When the equipment is moved or the line is reformed, the cable can be disassembled and reused.
(8) Small external diameter and light weight
Compared with conventional plastic cables, mineral insulated cables are 50% smaller in outer diameter and 30% lighter in weight, which can not only reduce the occupied space, but also facilitate installation.