7 How big of wire do you need for a 5 kW three phase asynchronous motor?

4 square lines are sufficient.

A three-phase asynchronous motor used for motor operation. The speed of the rotor of the three-phase asynchronous motor is lower than the speed of the rotating magnetic field, and the rotor winding induces electromotive force and current due to the relative motion between the rotor and the magnetic field, and interacts with the magnetic field to generate electromagnetic torque to achieve energy conversion.

Compared with single-phase asynchronous motors, three-phase asynchronous motors have good running performance and can save various materials. According to the different rotor structures, three-phase asynchronous motors can be divided into cage type and winding type. The asynchronous motor of the cage rotor has a simple structure, reliable operation, light weight and low cost, and has been widely used, but its main disadvantage is that it is difficult to regulate the speed.

The rotor of the wound three-phase asynchronous motor, like the stator, is also provided with three-phase windings and is connected to an external rheostat through slip rings and brushes. Adjusting the rheostat resistance can improve the starting performance of the motor and adjust the rotational speed of the motor.

Electrician major, a square copper wire 4 to 7 currents, the motor is three times the normal operating current when starting, 3 times 6 square wires on the line.

I use a squared line for more than an hour at a time, and the line temperature is more than five or six degrees higher than the ambient temperature. So with 4 square is enough. to the guarantee that it is a genuine copper wire.

A 4 square line is sufficient, but a 6 square line is preferred.

4 times 4 is enough for the copper core, and the aluminum core is thicker, 4 times 5.

This is divided into two cases:

1. If the motor is single-phase, and the trace touches i=p u=34a, 6 square copper wires should be used.

2. If the motor is three-phase, its rated current.

i=p (, the maximum rated current that can be borne by 1 square copper wire is 6A, and the maximum rated current that can be borne by square copper wire is 15A, then square copper wire should be used.

The motor is generally three-phase, and square copper wires can be used.

Talking about the posture of the motor wiring:

Plus three, 4 plus four; 6 after 6 add six, 25 five; 120 wires, with hundreds. Explain that this mantra is for wiring three-phase 380-volt motors. The wire is an aluminum-core insulated wire (or plastic wire) and is laid through the pipe.

Add three" to mean square millimeters.

The aluminum core insulated wire is laid through the pipe, which can be equipped with a "plus three" kilowatt motor, that is, a maximum kilowatt motor. "4 plus four" is a 4 square millimeter aluminum core insulated wire, which is laid through the pipe and can be equipped with a "4 plus four" kilowatt motor. That is, it can be equipped with a maximum of 8 kilowatts (the product only has a similar kilowatt).

"6 plus six" means that starting from 6 square millimeters, and later can be equipped with "plus six" kilowatt motors. That is, 6 square millimeters can be equipped with 12 kilowatts, 10 square millimeters can be equipped with 16 kilowatts, and 16 square millimeters can be equipped with 22 kilowatts.

"25 five" means that from 25 square millimeters, the addition number is changed from six to five. That is, 25 square millimeters can be equipped with 30 kilowatts, 35 square millimeters can be equipped with 40 kilowatts, 50 square millimeters can be equipped with 55 kilowatts, and 70 square millimeters can be equipped with 75 kilowatts. "120 wires with hundreds" (read "102 wires with hundreds") means that the motor is as large as 100 kilowatts.

The cross-section of the wire is not matched with the motor in the relationship of "enlargement", but the wire of 120 square millimeters can only be equipped with a motor of 100 kilowatts.

This is divided into two cases:

1. If the motor is single-phase, i=p u=34a, use 6 square meters of copper wire to change the late side.

2. If the motor is three-phase, its rated current.

i=p (, the maximum rated current that 1 square copper wire can withstand is 6A, and the maximum rated current that a square copper wire can withstand is 15A, then a square copper wire should be used.

The motor is generally three-phase, and square copper wires can be used.

Conductor cross-sectional area and current carrying capacity.

Calculation: 1. The safe ampacity of the general copper conductor is determined according to the maximum temperature, cooling conditions and laying conditions of the allowable core. Generally, the safe current carrying capacity of copper wire is 5 8A mm2, and the safe load and early flow of aluminum wire is 3 5A mm2.

2. Calculate the recommended value of the safe ampacity of the copper conductor using the copper conductor 5 8A mm2, and calculate the upper and lower ranges of the selected copper conductor cross-sectional area S: s=< i (5 8)>= i i(mm2) s--- copper conductor cross-sectional area (mm2) i--- load current (a).

3. The general load (which can also be used as an electrical appliance, such as a lamp, refrigerator, etc.) is divided into two types, one is a resistive load, and the other is an inductive load.

The formula is calculated for resistive loads: p=ui for fluorescent lamps.

The formula for calculating the load: p=uicos, where the power factor of the fluorescent lamp load.

cosф=。

Three-phase motors can be made with square centimeter copper or aluminum core cables.

It is calculated according to the power formula: p = has i = p (

Calculated according to the three-phase mains, the power factor is taken.

In the usual use of electricity, the wires usually used are very thin, because the current it carries when working is not large, in the power system centimeters, the output current of the general transformer and low voltage side is the sum of the current used by the user, less in hundreds of amperes, more in thousands of amperes. Therefore, the wire diameter of the selected wire should not be too small, in order to meet the sufficient overcurrent capacity.

Obviously, the overcurrent capacity of the wire is temperature dependent. The higher the temperature, the higher the resistivity of the wire. The resistance increases, and the power consumption increases, so when choosing a wire, we should try to choose a wire that is greater than the rated current, which can effectively avoid the occurrence of the above situation.

Motor refers to a type of electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction.

The motor is represented by the English letter M in the circuit, the key role of the motor is to generate driving torque, as the power source of electrical appliances and various types of machinery, and the generator is represented by the English letter G in the circuit, and the key role is to convert mechanical energy into electrical energy.

A cable is a kind of electrical energy or current signal transmission equipment, generally covering several wires or several sets of wires. According to the system of the photovoltaic power station, cables are usually divided into AC cables and DC cables.

The cable size can only be squared. 1.The kilowatt three-phase motor is rated at 3 times the rated current for no-load starting. 3.4 square copper wires are required for long working hours. 4.Note that the distance is < 200 meters, and there will be voltage drop if the line is too long.

According to the motor current estimation (1kW=2A), the operating current of the motor is 11A. If the distance between the power supply and the motor is not too far, grade or grade 4 aluminum wire can meet the current requirements. If you choose a flat copper cable, the effect should be better.

According to the motor current estimation (1kw = 2A), the motor working current is 11A, if the distance between the power supply and the motor is not very far, flat or 4 flat aluminum wire can meet the current requirements. If you choose a flat copper cable, it should work better.

Square (or more) copper cables are acceptable.

For short distances, 4 square copper core cables are sufficient.

Hello, I am glad to answer for you, 7, 5 kW three-phase motor with square copper wire. 7,5 kilowatt three-phase motor with rated current i=p (, the maximum rated current that 1 square copper wire can withstand is 6A, and the maximum rated current that can be withstood by the square copper wire is 15A, then the copper wire of the square Chang square should be used.

Squares are enough. If the load is heavy and the inverter is not used, it is recommended to have a 4 square line.

First of all, according to the power formula (p = root number 3 * U * i *), the current is about 14 A.

Secondly, taking into account the starting current, it is necessary to use the square (according to the ammeter.

Check the corresponding wire diameter and rated current.

If the motor voltage is 380V, 4-pole motor, then the rated current of the motor is about 15A, if the distance is about 100 meters, you can choose a copper core cable with a conductor cross-sectional area of 4 square millimeters. If the number of poles of the motor is more than 6 poles or the cable length is greater than 200 meters, long-term use can use a copper core cable with a conductor cross-sectional area of 6 square millimeters.

Three-phase electricity, estimated by one kilowatt and two currents. The kilowatt rated power is 15 amps. Press 15a-20a to select the line or open empty, 4 square millimeters of line.

The motor current is about 15 A, and the square wire can pass about 25 currents, so such a wire can be used.

A 2 square millimeter cross-section wire can meet the needs of a kilowatt motor.

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Pro, three-phase motors with 4 square copper wires will do. Since the starting current of the motor is relatively large, it is necessary to use a coarse one.

Summary. Hello dear, <>

Three-phase motors with square copper wires.

The motor is three-phase, and its rated current is i=p (, the maximum rated current that can be withstood by 1 square copper wire is 6A, and the maximum rated current that can be withstood by the square copper wire is 15A, then the square copper wire should be used.

The motor is generally three-phase, and square copper wires can be used.

The calculation formula for wire wiring should first calculate the phase current according to the power, the formula is p=, and the calculation formula for resistive load: p=ui The calculation formula for the fluorescent lamp load: p=uicos, where the power factor cos = for the fluorescent lamp load.

The power factor of different inductive loads is different, and the power factor cos can be taken when the household appliances are calculated in a unified manner.

Kilowatt motor single item|Three-phase, multiplication of a single term is 1, and multiplication of three phases by 2 is 1 2=2a. Aluminum-core wire ampacity; 10 under five is 1 5 = 5a, copper wire upgrade calculation is 1 square millimeter copper core wire ampacity is square wire ampacity of .

How many square wires are used for kilowatt three-phase motors?

Hello dear, I have seen your question and am sorting out the answer, please wait a while

Hello dear, <>

How many square wires do kilowatt three-phase motors use to quiver? Three-phase motors with square copper wires. The motor is three-phase, and its rated current is i=p (, the maximum rated current that can be withstood by 1 square copper wire is 6A, and the maximum rated current that can be withstood by the square copper wire is 15A, then the square copper wire should be used.

The motor is generally three-phase, and square copper wires can be used. The calculation formula for wire wiring should first calculate the phase current according to the power, the formula is p=, the calculation formula for resistive load: p=ui The calculation formula for fluorescent lamp load:

p = uicos, where the power factor cos = of the fluorescent lamp load. The power factor of different inductive loads is different, and the power factor cos can be taken when the household appliances are calculated in a unified manner. Kilowatt motor single item|Three-phase, single-term multiplication is 1, three-phase rise only defeat multiplication 2 is 1 2 = 2a.

Aluminum-core wire ampacity; 10 under five is 1 5 = 5a, copper wire upgrade calculation that is, 1 square millimeter copper core wire current carrying capacity for the square mountain cover of the wire current carrying capacity of .

Hello dear, <>

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Summary. Generally, a 380V motor is estimated at a rated current of 1 kW 2A. The rated current of a kilowatt motor is about 15A.

In general, the rated current through which a wire passes is 5 times the cross-sectional area of the wire. Combine the above and leave a certain margin, so it is best to choose a 4 4 or 4 3 + 1 cable. The <> of the cable with the model number or

Than the heart] [than the heart].

How many wires are needed for a kilowatt 380v motor.

Generally, a 380V motor is estimated at a rated current of 1 kW 2A. The rated current of a kilowatt motor is about 15A. In general, the rated current through which a wire passes is 5 times the cross-sectional area of the wire.

Combine the above and leave a certain margin, so it is best to choose a 4 4 or 4 3 + 1 cable. The <> of the cable with the model number or

Than the heart] [than the heart].

If my answer is helpful to you, please give a thumbs up (comment in the bottom left corner), look forward to your like, your efforts are very important to me, and your support is also the motivation for my progress. If you feel that my answer is still satisfactory, you can click on my avatar for one-on-one consultation. Finally, I wish you good health and a good mood!

Hello dear, happy to serve you! The wire size of a kilowatt three-phase motor needs to be determined according to the rated current and supply voltage of the motor. Generally speaking, the rated current of a kilowatt three-phase motor is around 15 amps, so it is necessary to choose a wire with a wire cross-sectional area of at least square millimeters.

If the length of the wire is long or the starting current of the motor is large, the wire with a larger cross-sectional area should be selected to ensure that the wire can withstand the rated current and guarantee the normal operation of the motor. It should be noted that the selection of wires should be analyzed and judged according to the actual situation. The number of square wires used for a kilowatt three-phase motor depends on the rated current and supply voltage of the motor.

Generally speaking, the cross-sectional area of the wire should be matched according to the rated current of the motor to ensure the normal operation and safety of the motor. Here are some common wire specifications and current capacity correspondence:- Square millimeter wire:

Current capacity of 10 amps; - Square millimeter wire: current capacity of 16 amps; - 4 mm² wire: current capacity of 25 amps; - 6 mm² wires:

The current capacity is 32 amps; - 10 mm² wire: 50 amps with current capacity. Notes:

1.When selecting the wire, you should refer to the rated current and power supply voltage of the motor to select the appropriate wire specification to ensure that the wire can carry the current; 2.When using wires, pay attention to the length and laying method of wires to avoid excessive length or bending of wires, which will affect the transmission efficiency of wires; 3.

When connecting wires, attention should be paid to the firmness and stability of the connection to avoid problems such as poor contact or looseness; 4.During the operation of the motor, the temperature and voltage of the wire should be checked frequently, and the problem should be found and dealt with in time; 5.After the motor stops running, the power supply and wires should be disconnected to avoid safety issues such as short circuit or leakage of wires.

In general, when using wires, it is necessary to choose the wire specifications and laying methods reasonably to avoid the wire overload or failure that causes the motor to operate normally or cause safety problems. Please pay attention to safety during work, please leave a message if you have Zen and questions, I hope it can help you, dear, and finally I wish you a happy life! Dear, if you think it is helpful to you, please give a thumbs up, thank you, dear