A 500 kVA transformer is 250 meters away from the distribution room, and the cable must be 30

10/ 500kva/10kv/。

The fault removal time is assumed that the short-circuit current of the 10kV system is set to 10kA.

If a copper-core cable is selected, the minimum cross-sectional area is about 8mm2.

The laying method is assumed to be a concealed application through the tube, and the ambient temperature is set to 40 degrees Celsius.

The comprehensive reduction coefficient is about, then YJV-6 10 3*25mm2 can be selected.

Then check the voltage drop of the line to meet the general requirements (3%).

If the short-circuit current of the system exceeds 20ka, the fault removal time is about 1s, and it is recommended to use YJV-6 10 3*50mm2.

For 10kv power supply, 500kva 10kv, so 25mm2 10kv high voltage cable is enough.

The situation is not well described.

For example, 10 500kva 10kV fault removal time is assumed to be 10kV system short-circuit current is set to 10kVA, if copper core cable is selected, the minimum cross-sectional area is about 8mm2

The laying method is assumed to be a concealed application through the tube, and the ambient temperature is set to 40 degrees Celsius.

The comprehensive reduction coefficient is about, then YJV-6 10 3*25mm2 can be selected, and then check the line voltage drop to meet the general requirements (3%), if the system short-circuit current exceeds 20ka, the fault removal time is about 1s, it is recommended to choose YJV-6 10 3*50mm2

If you want to make a detailed and accurate calculation, you need to describe the situation clearly.

Hello, glad to answer for you. To determine the required cable size: the current size of the total load in the kilowatt; 2. The length of the cable (120 meters); 3. The material and type of the cable. Assuming a load voltage of 380V, the total load current according to OHM's law is:

i = p v = 500000 380 = a Next, it is necessary to determine the cross-sectional area of the stool cable. It depends on the cable length, load current, and cable material. Generally speaking, the selection of cables should meet two conditions:

1. The cross-sectional area of the cable is greater than or equal to the required early cross-sectional area to ensure that the cable will not overheat under the rated load; 2. The cable is as small as possible to reduce costs and losses. If copper cables are used, a cable with a cross-sectional area of 95 square millimeters (mm) can be selected according to the wiring regulations. If aluminum cable is used, a cable with a larger cross-sectional area is required, and it is generally recommended to use a 186 square millimeter cable for jujube fiber.

When the total load is 500 kW and the load voltage is 380V, 120 meters from the transformer is equipped with copper cables, and cables with a cross-section of 95 square millimeters can be selected.

To determine the size and cross-sectional area of the cable, it is necessary to calculate the power factor of the total load of 500 kW, the length of the cable route, the type of load and other factors. Here's a simple calculation example:

Suppose the power factor of the total load is 120 meters, the load type is 3-phase 4-wire, and the supply voltage is 380V.

According to the calculation formula of electric limb distribution cable:

Cable cross-sectional area (a) = 2 p l cos ) u k δ).

where P is the total load power, L is the length of the cable line, COS is the power factor, U is the supply voltage, K is the conductor material coefficient, and δ is the resistivity of the cable route.

Suppose the value of k is and the δ value is.

Then, the cable cross-sectional area (a) = 2 500000 120 380 179mm.

Therefore, in this case, the size of the distribution cable 120 meters from the transformer should be 179mm.

It should be noted that due to the voltage drop and loss of the cable, the actual cross-sectional area of the cable used in the selection of acacia may be slightly larger than the theoretical calculated value. Therefore, in specific applications, specific adjustments and calculations are also required according to the actual situation.

50 meters away from the transformer, how many square meters of cable line should be selected for 300 kilowatts? Thank you.

50mm When selecting a cable, due to the presence of buildings, underground pipes or underground cable pipes near the installation, the maximum allowable suspension depth of a single cable and the minimum outer diameter of each cable insulating shell should also be considered whether it is suitable for burial here, and the type of cable protection pipe should be reasonably considered. At the same time, according to the installation height of the suspension rod and the safety requirements of the banquet file, the appropriate type of cable suspension system should be selected, the cable suspension structure should be designed, and the number and spacing of the suspension rod should be noted, and the safety distance and payload of the suspension chain should be noted. In addition, in order to ensure the service life of the cable, the cable should be used according to the design requirements of anti-ultraviolet attenuation, acid and alkali resistance, anti-pollution, water immersion resistance, and at the same time set up enough cable transceiver heads to ensure that the cable connection structure is good, and the wire and the bracket can be moxibusted and the quality is correct.

Summary. Hello dear dear, we will expand the following <> for you

A transformer is a kind of multi-terminal electrical equipment that uses the principle of electromagnetic induction to raise and lower voltage and realize energy and information transmission. The invention of the device can be traced back to Europe in the nineteenth century. The main structure is the body composed of iron core, winding, lead wire and several accessories, including fuel tank, explosion-proof pipe, gas relay, tap, insulating sleeve, etc.

There are many types of transformers, which can usually be divided into power transformers and special transformers according to their use. The main function of the transformer is to realize the rise and fall of voltage, in addition, it can also realize the rise and fall of current, energy transmission, electrical insulation isolation, voltage stabilization of the circuit, improve the anti-interference of the circuit and so on.

50 meters away from the transformer, how many square meters of cable line should be selected for 300 kilowatts? Thank you.

Hello, glad to answer for you.

50 meters away from the brother jujube transformer, 300 kilowatts of dust or 350 square meters of cable, the calculation formula is as follows: 350 * 1 = 350

Hello dear dear, we will expand the following <> for you

A transformer is a kind of multi-terminal electrical equipment that uses the principle of electromagnetic induction to raise and lower voltage and realize energy and information transmission. The invention of the device can be traced back to Europe in the nineteenth century of silver. The main structure is the body composed of iron core, winding, lead wire and several accessories, including fuel tank, explosion-proof pipe, gas relay, tap, insulating sleeve, etc.

There are many types of transformers, which can usually be divided into power transformers and special variable voltage transformers according to their uses. The main function of the transformer is to realize the rise and fall of voltage, in addition, it can also realize the rise and fall of the current of the letter and liquid, the transmission of energy, the isolation of electrical insulation, the voltage stabilization of the circuit, and the improvement of the anti-interference of the circuit.

Summary. Hello! 80* should choose 35 square line, if the line is more than 100 meters to consider the voltage drop. 35-45 sq. m.

Hello! 80* should be used to collapse the core circle of 35 square line, such as the fruit line more than 100 meters to consider the voltage drop. 35-45 sq. m.

Hello! You are an 80kva transformer, the simple thing is, the transformer secondary 400v (called 380v), then 1kva is 2a current, and the current that can flow through 100 meters of 1 square cable is about. You know how big the cable you use, you had better use 95 120 square meters of electric cable, because Zheng Xi for you to raise this is a transformer cable to have enough margin.

Summary. The line is too long, and in order to reduce the voltage drop, it is necessary to use a copper core wire with a large cross-section.

Load 11 kilowatts, current: A 220A, distance: l 2300 meters, allowable terminal voltage drop of 7% (line to line voltage drop of about 27V), voltage drop per wire: U, resistivity when using copper wire:

Single wire resistance:

r＝u/i＝

Wire cross-section: s l r squared).

2,300 meters away from the transformer with 11 kilowatts of wire.

It is recommended to use a line of 56 squares.

The line is too long, and in order to reduce the voltage drop, it is necessary to use a copper core wire with a large cross-section. Load 11 kW, Current: A 220A, Distance:

l 2300 meters, the allowable terminal voltage drop of 7% (line and line voltage drop of about 27V), the voltage drop of each wire: U, the resistivity when using copper wire: single wire resistance:

r u i wire cross-section: s l r squared).

Sorry for the mistake in front, it's a 65 square line.

Summary. 70kw power consumption, the current is about a distance of meters, it is recommended to use 150 square meters of aluminum stranded wire.

The electricity consumption is 50 kilowatts, three-phase electricity, 700 meters away from the transformer, how big an aluminum cable is suitable, thank you.

70kw power consumption, the current is about a distance of meters, it is recommended to use 150 square meters of aluminum stranded wire.

How to get it. First of all, it is necessary to calculate the theoretical current of the normal operation of the 70kw load: three-phase current = power rent rate, voltage, phase negative load, power factor, current=70000 380

I'm sorry, but it's 70 kilowatts, I'm sorry.

35 square cables. Knowing that its power is 50 kilowatts, and in the three-phase circuit leakage blind hunger, you can combine the power factor, generally speaking, the value is, first calculate the voltage, through, and then, after the data is obtained, through the division of 50 kilowatts, you can get its current, the number of gods is probably close to 90 A. According to the current carrying capacity of the wire, a cable of 35 square meters should be selected if it can be returned.

I'm so sorry to kiss it.