Select and calculate the automatic motor for the
There are two common ways to select the switch for the motor.
So, the first way is to calculate the total power of the devices that will be powered by this switch. We expect that the devices( TV, refrigerator, computer, washing machine, etc.) will be connected to this circuit of electric current, we add the power of all these devices and on the basis of this we calculate the current of the rosette group. With such calculations, you should consider how many phases in your rastavshim electric motor. For example, in a three-phase, with a power of 4 kW, 4 ∙ 3 = 12A, then 12A is the operating current. Hence, to this electric motor the 16A submachine gun is suitable.
The second way to calculate the maximum power of devices connected to the machine, is to calculate the total power through the passports of each device. The power of the instruments is indicated on the instrument passports, here we summarize it and determine the total power. As an example, 2kW + 600W + 2100W = 4700W.Now simply substitute the value in the conventional formula: I = W / U, where I - is the power, W - voltage and U - current in the network;I = 4700 divide by 220, so we get 21.36A.But do not forget that washing machines and some other devices have their motors, and they have a so-called starting current, which at start-up is much greater than the indicated capacity of the device. But manufacturers of automatic machines know this perfectly and so the switches have a current setting.
It is not so difficult to choose an automatic machine, guided by the following rules:
- The main characteristic for automata is the rated current, measured in Amperes. The range is from 6 to 100A.
- A short-time current value at which the machine will not trip. It, in a simple way, jumps of a current to which the switch is sensitive. The shutdown devices are assigned to three values: "B", "C", "D".The lowest denomination is "B".
- The descriptions of the switch must be reflected on the nameplate of the machine.
- Switches are divided into phases.
- Advised to select for everyday life several "C" nominal switches. One to put on the incoming current, the others separate from each other along the current flow and the connection of devices.
Electric motor 15 kW current
There are many types of motors with a 15 kW power rating, but they all have different characteristics. Let us consider examples of such engines.
The most common are the following engine samples:
- Asynchronous electric motor 4AM160S4 15/1460 380-660V;
- Electric motor 15 kW 1500 rpm;
- Electric motor 15kW at 3000 rpm AIR160S2 and 15 kW for 1500 AIR160S4;
- Electric motor AIR160S2 15,0 kW 3000 per AIR 160 S2;
- Electric motor 15kW 1000 about mines AIR160M6.
Everyone has two characteristics, this is a power of 15 kW and three-phase, and the type of motor is asynchronous and of course the presence of a contactor. Other characteristics, such as rotational speed, rotor type and brand all differ. Electric motors of this type are designed to perform work from a network with an alternating current of frequency 50 Hz and are produced for such nominal voltages:
- 220 V;
- 380 V / 220 V;
- 380 V;
- 660 V;
- 380 V / 660 V.
More variants of selection and information about automatic devices for electric motors, see the video on the next tab.
