How many square copper core flexible cables are used for 30 kilowatt motors

According to the power formula p= there is: i=p (

54A (calculated according to the three-phase mains, the power factor is taken.)

Check the cable ampacity meter below, optional 10 square copper cable (hard wire). Copper core flexible cable can theoretically choose a smaller specification, but it is generally recommended to choose a 10 square cable is safer.

The current calculation formula of three-phase motor is: ie=p

Rated voltage U = 380V Power Factor COS = Efficiency = 95% P Power. ie=30*1000/

The cable is selected with a cross-sectional area of 16 square millimeters.

There is one thing to keep in mind when choosing a cable: the larger the cable cross-sectional area, the worse the heat dissipation, the more obvious the skin effect, and the smaller the current carrying capacity. So when choosing, you should leave a certain amount of leeway.

30 kilowatt motor, current 60 A, using 16 square copper core cable is fine.

If the transmission distance is within 20 meters, it is enough to use 10 square cables, and if the transmission is far, it is necessary to increase the wire area, which is theoretically 16 square meters.

Summary. Hello dear, 30kw motor with more than 10 square copper wire, according to the three-phase motor rated power calculation formula: p=u i for the power factor of this motor, for the efficiency of the motor, in the actual estimation of the calculation of the cos value of the domestic motor can be estimated, you and i are the motor winding phase voltage, phase current), it can be known that the rated current of the motor is about 57a.

Hello dear, 30kw motor with more than 10 square copper wire, according to the three-phase motor rated power calculation formula: p=u i for the power factor of this motor, for the efficiency of the motor, in the actual estimation of the calculation of the cos value of the domestic motor can be estimated, you and i are the motor winding phase voltage, phase current), it can be known that the rated current of the motor is about 57a.

Below 10 square meters shall be wired according to 5A per square meter, more than 100 square meters shall be wired according to 2A per square, more than 10 (exclusive) and less than 25 square meters shall be wired according to 3A per square meter, and more than 35 square meters (inclusive) and below 100 square meters (exclusive) shall be wired according to 4A per square meter. Therefore, you should choose a cable of more than 10 square meters.

To connect a 30 kW electric motor, 10 square copper wires are required. The rated operating current of the 30 kilowatt motor is about 54A, the allowable current of the long-term continuous load of the 16 square copper cable is 60A, and the long-term continuous load of the 25 square copper cable is 77A.

If it is a voltage of 380v, 3000 380, it is a bit small to use 16 square wires, it is recommended to use 25 square wires; If it is a voltage of 220V, 30000 220=, it is recommended to use a 70 square wire.

Cable ampacity.

It refers to the amount of current passed by a cable line when transmitting electric energy, and the cable current carrying capacity when the cable conductor reaches the long-term allowable operating temperature under thermally stable conditions is called the long-term allowable current carrying capacity of the cable.

The current carrying capacity of the wire is related to the cross-section of the wire, and is also related to the material, model, laying method and ambient temperature of the wire, etc., and there are many factors that affect it, and the calculation is also more complicated. The current carrying capacity of the various wires can usually be found in the manual. However, with the use of formulas and some simple mental arithmetic, you can calculate it directly, without having to look up the table.

10 square copper wires.

If in a single-wire circuit, 10 square copper wires, it corresponds to about 13 kilowatts. If you want to meet the operation of a 30 kW motor, it is not possible to meet the requirements. But if it's in a three-phase circuit.

Among them, the voltage reaches 380 volts, corresponding to 10 square copper wires, and its power can reach 39 kilowatts, so it can fully meet the operation of 30 kilowatts of electric motors. Generally speaking, a 30 kW electric motor will be used in a three-phase circuit, so it can be satisfied.

Precautions for the use of copper wire

The cable should be protected to ensure that it is not infringed in any way. All wires used must be insulated. The cable must be placed in children, animals, and especially rodents.

Out of reach of naughty cubs. The wiring process should be carried out in the event of a power failure.

Protective insulating gloves should be worn before laying cables. During the wiring process, each worker should manage cables weighing no more than 35 kg, not longer ones. All workers should be on the same side of the cable. Care should also be taken to use welded cables.

How many square meters of cable should be used for a 220 kilowatt motor, and look at the correspondence between the electrical power and the matching cable in the following cases:

Cables, according to the material, have a difference between copper and aluminum.

Copper wires are usually made of copper cables because they are more efficient than aluminum wires and have a higher mechanical pull than aluminum wires.

The following is the relationship between the cross-sectional area of the copper wire and the power of the consumer, and the corresponding cross-sectional area of the copper wire can be selected according to the power of the consumer.

According to the corresponding data above, the corresponding specifications of the cable are calculated.

220000 380, basically in line with the popular algorithm of 1KW motor and 2A current. Copper wire is calculated according to 3a per square millimeter, it is: 407 3 = 135, it is recommended to use 150 square millimeters of wire Note, the larger the copper wire, the smaller the unit current carrying capacity.

The current carrying capacity of the 3-core 150yjv cable standard of the cable manufacturer is 325A, because he considers the factors such as the overcurrent safety factor and the cable length, and the actual use can be slightly amplified.

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Hello: 220kw motor can use 95mm copper cable, or 140mm copper cable. Calculation steps:

1. According to one kilowatt and two currents, it is estimated that the rated current of 55kw motor is about 440A; 2. The specification level of the cable is 1, and the formula for estimating the current carrying capacity of the cable is "2.5 times nine, and subtract one by one straight number." Thirty-five times 3.5, double in a group minus five. "It can be calculated that the safe current of a 95mm cable is about 95*5 = according to the second half of the formula" The conditions are variable and converted, and the high-temperature nine-fold copper is upgraded.

The number of pipe roots is two, three, four, eight, seven and six folds full of load current. "If you're using a copper cable, 95mm is fine. 4. To sum up, 220kw motors can use 95mm copper cables, or 140mm copper cables.

The 220 kW 380 volt AC motor has a rated current of about 380 amperes and can be connected in parallel with two 95 square copper cables.

The key is how far the power supply distance is, and can you tell us? That is, from the transformer, or the distribution room to the motor, and of course, the starting cabinet in between. Generally, within 200 meters, 240 square copper core cables.

If it is a three-phase 380 volt AC circuit with electrodes of 220 kW, it is about 440 A current. According to the cable distribution table you need, you can know.

The 220 kilowatt motor should use 240 copper core cable or 300 aluminum core cable.

To connect a 30 kW electric motor, 16 square copper wires are required.

Calculated by the motor power formula p=using three-phase mains, the power factor is taken as: i=p (

The rated operating current of 54A is about 54A, and the allowable current of 16 square copper cable for long-term continuous load is 60A, and 16 square copper cable can be selected.

Summary. A pro 30 kW motor needs to be more than 16 square meters.

30 kW motors use aluminum wires of more than 16 square meters or copper wires of more than 10 square meters.

How many square meters of aluminum cable do I need for a 30 kW motor?

A pro-30 kilowatt motor requires more than 16 square meters, and a 30 kilowatt motor uses more than 16 square aluminum wires or more than 10 square copper wires.

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How much square aluminum money is used for 30 kilowatts of three-phase electricity?

With 16 squares.

10 square copper core wire is required.

Main information:

Electric machinery (commonly known as "motor") refers to an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction.

The motor is represented by the letter M in the circuit (the old standard is D), its main role is to generate driving torque, as the power source of electrical appliances or various machinery, the generator is represented by the letter G in the circuit, and its main role is to use mechanical energy to convert into electrical energy.

The working principle of the DC generator is to change the alternating electromotive force induced in the armature coil into a DC electromotive force when it is drawn out of the brush end by the commutator and the commutation action of the brush.

The direction of the induced electromotive force is determined according to the right-hand rule (the magnetic inductance line points to the palm of the hand, the thumb points to the direction of the conductor's movement, and the other four fingers point to the direction of the induced electromotive force in the conductor).

The direction of the force on the conductor is determined by the left-handed rule. This pair of electromagnetic forces forms a moment acting on the armature, which is called electromagnetic torque in a rotating electric machine, and the direction of the torque is counterclockwise, in an attempt to make the armature rotate in a counterclockwise direction.

If this electromagnetic torque can overcome the resistance torque on the armature, such as friction and other load torques, the armature can rotate in a counterclockwise direction.

The 220 kilowatt motor uses 185 square meters of copper wire.

First, calculate the motor current value i, i=p (

220 (Calculated by three-phase mains, the power factor is taken.)

According to the formula, the preliminary estimate of the cable should be more than 120 square meters, so the safe current carrying capacity of the cable is 2A per square, the square number of the cable = 393 2 = 197 square meters, according to the cable specification series (95, choose 240 square aluminum wire or 185 square copper wire.

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Hello: 220kw motor can use 95mm copper cable, or 140mm copper cable. Calculation steps:

1. According to one kilowatt and two currents, it is estimated that the rated current of 55kw motor is about 440A; 2. The specification level of the cable is 1, and the formula for estimating the current carrying capacity of the cable is "2.5 times nine, and subtract one by one straight number." Thirty-five times 3.5, double in a group minus five. "It can be calculated that the safe current of a 95mm cable is about 95*5 = according to the second half of the formula" The conditions are variable and converted, and the high-temperature nine-fold copper is upgraded.

The number of pipe roots is two, three, four, eight, seven and six folds full of load current. "If you're using a copper cable, 95mm is fine. 4. To sum up, 220kw motors can use 95mm copper cables, or 140mm copper cables.