Miner power factor
Publish: 2021-04-21 03:23:54
1. "Three phase total current is 3 * 40 = 120 a" which idiot taught you the algorithm< It depends on whether you are responsible for inctive load or resistive load or capacitive load.
your three-phase 10kW motor current is generally about 20A, The power factor is not as simple as you think. It's very complicated to calculate. Here I will tell you that it's 20 A. if there is a single-phase load, the current is larger than 45 A. It can be taken as 60 A.
it is recommended to use a 100A three-phase meter, which is 3 * 100
your three-phase 10kW motor current is generally about 20A, The power factor is not as simple as you think. It's very complicated to calculate. Here I will tell you that it's 20 A. if there is a single-phase load, the current is larger than 45 A. It can be taken as 60 A.
it is recommended to use a 100A three-phase meter, which is 3 * 100
2. The ball mill often used in mines can be divided into short simple type, cone type and long cylinder type according to its structure. The cylinder length of the short cylinder ball mill is less than the diameter of the cylinder, the conical ball mill is composed of the cylinder part and the conical parts on both sides, and the cylinder length of the long cylinder ball mill is greater than the diameter of the cylinder. According to the medium used, it can be divided into ball mill and rod mill. At present, no medium grinding machine is used in mines. According to different ways of ore discharge, it can be divided into forced discharge lattice ball mill and gravity discharge overflow ball mill. According to the transmission system is divided into three categories: 1. By the V-belt drive as a deceleration of the transmission system. The advantages of this kind of transmission system are that the transmission parts are easy to manufacture, the price is cheap and the maintenance is simple. But the disadvantages are large area and low transmission efficiency. 2. The gear recer is used as the transmission system. The advantages of this transmission system are reliable transmission and compact structure. But the disadvantage is that the recer is more expensive, causing trouble. 3. Low speed motor is used as the transmission system of deceleration. The advantages of this kind of drive system are that the whole drive system is very compact, the transmission efficiency is high, the metal consumption is small, the motor is synchronous motor, so it can also improve the power factor of the power network. But electric motors are expensive. Mine ball mill is generally composed of feeding, cylinder, discharge, transmission, main bearing, recer and other main parts, as well as coupling, lubrication system, electrical equipment and other auxiliary parts. The specification of ball mill is expressed by the inner diameter and effective length of the cylinder.
3.
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does not move
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according to P = FV, 6KVA generator, the output current is only 24a, a 7.5kW water pump and 5.5kW mining machine, the total power is 13kw, the normal current has 26a, overload. Moreover, the starting current of the motor is larger, that is, the starting current of 7.5kW is about 30A. If the 7.5kW is started first, the working current is already 15a, and then the 5.5kW is started, the starting current is 20a, and the total current is 35A
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it's mainly about the selection of contactors. It's better to use contactors with larger capacity, because the water pump motor starts with load, and the current at the moment of starting is too large, which will cause great damage to the contacts of contactors. If the selection is small, it will affect the service life of contactors
The output voltage of the generator should be increased correspondingly ring the motor starting process to protect the voltage drop ring the motor starting. There should be no problem with 3KW motor with 1.5KW. It is enough to adjust the speed of the generator ring the start-up< br />
4.
No matter what kind of equipment can be driven by voltage regulator. When equipped with voltage regulator, measure the power of load first. Generally, the power factor of voltage regulator is 0.8. That is to say, 100kVA voltage regulator can take the load below 80kW
5. The welding machine 500KVA seems to be reasonable, but the data is not accurate< Other total power:
(30 + 37 + 5.5 + 2.2 + 7.5) × 4 + 4 + 20 ≈ 353 (kw)
the transformer efficiency is calculated as 0.8, the 400KVA transformer can load about 320kw. If the power factor is increased to 0.95 by capacitor compensation, the load can be ≥ 360kw, which is basically able to load. Although the welder will work slightly less, the load rate is short, and the short-term overload is OK.
(30 + 37 + 5.5 + 2.2 + 7.5) × 4 + 4 + 20 ≈ 353 (kw)
the transformer efficiency is calculated as 0.8, the 400KVA transformer can load about 320kw. If the power factor is increased to 0.95 by capacitor compensation, the load can be ≥ 360kw, which is basically able to load. Although the welder will work slightly less, the load rate is short, and the short-term overload is OK.
6. The efficiency of the transformer is generally 0.8400kva. The transformer can load about 320kw inctive load. The power factor can be increased by providing capacitor reactive power compensation, and the load can be increased to around 350kW
if the given data (welding machine) is correct, there is no need to calculate. Two welding machines of 500KVA = 1000KVA, and the temporary load rate of 40% is equal to 400KVA, which is equivalent to the transformer capacity, and the total load overload is nearly 100%.
if the given data (welding machine) is correct, there is no need to calculate. Two welding machines of 500KVA = 1000KVA, and the temporary load rate of 40% is equal to 400KVA, which is equivalent to the transformer capacity, and the total load overload is nearly 100%.
7. What is the voltage level of the generator? It is estimated that it is caused by 0.4kV direct supply and serious harmonic generated by mining machine load. Consider the harmonic control measures
there is no problem with the generator you are in charge of. It is the nature of the load of the other party. The user can handle the load problem by himself.
there is no problem with the generator you are in charge of. It is the nature of the load of the other party. The user can handle the load problem by himself.
8. Unknown_Error
9. 900x1800 flat head energy-saving ball mill, 5-8 tons per day, Henan metalworking quoted 28000 yuan
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