Formula for calculating the current carrying capacity of wires| Guizhou Thermal Mass Flow Meter Manufacturer

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What is the current carrying capacity of a 1.150 square copper cable?

The maximum capacity of a 150 square copper cable is 137.062 kilowatts. According to the safety current carrying capacity, it is known that the current carrying capacity of a 150 square millimeter copper core cable is 245A. Assuming a three-phase four wire system, the power calculation formula is as follows: P=√ 3UIcosb (cosb represents power factor, generally taken as 0.85) P=1.732 × 380 × 245 × 0.85=137061.82 watts=137.062 kilowatts. Additional information: Safety current carrying capacity refers to the amount of heat emitted by a wire that is exactly equal to the amount of heat generated by the current passing through the wire. When the temperature of the wire no longer increases, the current value is the safety current carrying capacity of the wire. Also known as safe current. The safe current carrying capacity of a wire is closely related to the ambient temperature in which the wire is located. The wiring of electrical equipment is generally insulated with plastic or rubber wires. Close the switch, and the current enters the electrical equipment through the wire, causing the electrical equipment to work. Due to the inherent resistance of electrical circuits, they generate heat when passing current, which is then dissipated into the air through the insulation layer of the wires. If the heat emitted by the wire is exactly equal to the heat generated by the current passing through the wire, the temperature of the wire will no longer rise, and the current value at this time is the safe current carrying capacity of the wire. The maximum allowable temperature for general rubber insulated wires is set at 65 ℃. At different working temperature

Formula for calculating the current carrying capacity of wires

s, the safe current carrying capacity of different specifications varies, as shown in the table. The safe current carrying capacity of a wire is closely related to the ambient temperature in which the wire is located. Generally, the lower the ambient temperature, the larger the current allowed to pass through. Taking aluminum core rubber insulated wire as an example, if its safe current carrying capacity is 25A at 25 ℃, the temperature rise during continuous use will not exceed 65 ℃. At 35 ℃, the safe current carrying capacity decreases to 21A because the former allows a temperature rise of 40 ℃ while the latter is 30 ℃. It also depends on the wiring method, as exposure to air is better for heat dissipation than laying in pipes. Necessary overcurrent protection devices should be installed in the circuit. Users are not allowed to extend the line or illegally use high-power electrical appliances such as electric furnaces, nor are they allowed to change the setting value of overcurrent protection devices without authorization, such as replacing fuses with copper wires. The safe current carrying capacity of wires and cables is related to factors such as the cross-sectional area of the wires, the type of insulation material, ambient temperature, and laying method. The safe current carrying capacity of the busbar is also related to the geometric shape and arrangement of the busbar. The formula for calculating three-phase AC power is: P=√ 3UIcosb. The total power of a three-phase circuit. It is equal to the sum of the power of each phase. Three phase circuits can be divided into symmetrical three-phase circuits and asymmetrical three-phase circuits. Power can be divided into average power (i.e. active power), reactive power, an

Formula for calculating the current carrying capacity of wires

What is the current carrying capacity of a 1.150 square copper cable?

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