How to choose a machine for the motor ?

Choose and calculate machine for motor

There are two common ways to select the switch for the engine.

So, the first way is to calculate the total power of the devices to be powered from this breaker.We expect that for appliances (TV, refrigerator, computer, washing machine, etc.) will be connected to this electric current circuit, the power add up all of these devices and on this basis we calculate the current socket group.In these calculations should take into account how many phases will melt in your motor.For example, in a three-phase, with an output of 4 kW, 4 ∙ 3 = 12A, 12A means - it is the power of the operating current.So, for such a motor suitable machine 16A.

second way to calculate the maximum power of devices connected to the machine, is to calculate the total power through the passport of each instrument.Passport instruments available power, it's summarize and define the total capacity.As an example, 2kW + 600W + = 2100Vt 4700Vt.Now just substitute the value in the conventional formula: I = W / U, where I - is power, W - voltage and U - the current in the network;I = 4700 divided by 220, and that's get 21,36A.But do not forget that some washing machines and other appliances have their engines, and they have a so-called inrush current, which when running a lot more than the specified capacity of the device.But machine manufacturers are well aware of this and therefore have breakers setting current.

Choose machine is not so difficult, the following rules:

• The main characteristic of this machine for the rated current, measured in amperes.Range from 6 to 100A.
• momentary current value at which the machine will not operate.This, in a simple way, the current jumps to which is sensitive switch.turn off the device belongs to three denominations: "B", "C", "the D".denomination "B" to the weakest races.
• Descriptions of the switch should be reflected on the rating plate of the machine.
• switches divided in phases.
• advised to choose life once more switches the nominal value "C".One to put on the input current, remaining separate from each other in the course of current and accession instruments.

15 kW electric motor current

There are many types of engines 15 kW current, but they all have different characteristics.Consider the examples of such engines.

The most common here are examples of such engines:

• 4AM160S4 asynchronous motor 380-660V 15/1460;
• motor 15 kW 1500 min;
• motor 15kW at 3000 rpm and 15 minutes AIR160S2 kW 1500 AIR160S4;
• motor AIR160S2 15.0 kW 3000 AIR 160 S2;
• 15kW electric motor 1000 rev min AIR160M6.

all share two characteristics, it is the power of 15 kW and trёhfaznost, and the type of engine - induction and of course the presence of the contactor.Other characteristics, such as speed, rotor type and mark all differ.Electric motors of this type are designed to perform work on a network with an alternating current frequency of 50 Hz and produced at such nominal voltage:

• 220;
• 380 V / 220 V;
• 380;
• 660;
• 380 V / 660 V.

More options selection and information about machines for electric motors, see the video on the next tab.