Electromagnetic starterElectromagnetic starter 380V is a specialized relay and performs the function of controlling the operation of a three-phase asynchronous motor. It does its job when the stator windings are connected to the network and the current is broken in them without first introducing additional resistances into the circuit.

The operation control of a three-phase asynchronous motor is performed by the device by means of only three action: starting the engine directly, stopping it, and very important protection against possible overloads.


  • 1 The main parameters of electromagnetic actuators
  • 2 What is the starter
  • 3 Wear resistance of starters
  • 4 Main characteristics of the device
  • 5 Modes of operation of the device
  • 6 Connecting an electromagnetic starter 380v
  • 7 The difference devices on 220V and 380V
  • 8 findings

The main parameters of electromagnetic actuators

In accordance with the main function of this device, its main element, and in some cases the only one, is a three-pole electromagnetic contactor of alternating current. All are connected with it The main parameters of the starter:

  • switching capacity
  • rated current and rated voltage of the switched circuit
  • mechanical and switching durability.

Electromagnetic starters, as well as contactors, are indispensable devices in power load control circuits.

What is the starter

To better understand the operation of the 380V electromagnetic starter, its mechanism and device should be considered in more detail. Knowledge of the elements of the device will allow in future work to answer questions or to avoid unpleasant situations.

So what does it consist of? The answer is very simple. Can highlight Three main elements:

  • Electromagnetic Series StartersPower contacts. As a rule, there are no more than three of them. These contacts perform the function of switching the power load. It is necessary to mention that the rated current of the device refers specifically to them.
  • Electromagnetic coil. This element is designed to control the operation of the starter and it is designed for 220v or 380v. In our case, this is 380v.
  • Additional contact. This element plays its role in the construction of the control scheme. In devices designed for large rated currents, there may be several types of such elements: closing or opening. Also an additional contact indicates the status of the starter.

Wear resistance of starters

The starters are subject to fairly high demands on the factor of their wear resistance, since they are elements of automatic control systems. Exists three wear classes in such devices, and they are denoted by the letters A, B and B.

In order to better understand this aspect, you should understand what the device has, for example, class A. The fact is that the device with the highest degree of wear resistance belongs to class A. A starter with the lowest, respectively, to class B. You can learn about the class to which a particular electromagnetic starter belongs, from its technical characteristics, which must be indicated in its data.

Main characteristics of the device

Starter deviceThe main characteristics This device are:

  • the maximum allowable value of the switched current and voltage
  • maximum current of additional contacts
  • power consumption of the control coil, the operating voltage (mainly it is 220v or 380v)
  • provided number of on / off cycles. This value characterizes the durability of the device.

Modes of operation of the device

Electromagnetic starter 380v, as well as devices that support other voltages, has several modes of operation, characterized by different duration of its activity. There are four of these modes: short-term, inter-short-term, intermittent-long, long.

Connecting an electromagnetic starter 380v

To connect this device, follow the procedure itself. examine all connection diagrams and understand the work of the starters. Design features of the device can serve as an auxiliary factor when connecting it. Schemes may seem extremely complicated, but for all the seeming complexity, the whole procedure is quite simple, even if the user has never done this before and has never made such connections. carried out.

The starters can carry out reverse and non-reversible switching on of electric motors, and have different versions. The last factor depends on the operating conditions of the device.

The difference devices on 220V and 380V

Differences actuator devicesAs mentioned above, electromagnetic coil starters can be on 220v or 380v. There are devices with coils that support other voltages, but we will not consider them, since they are quite rare.

The difference in connecting these devices to 220V and 380V is in their inclusion in the circuit. If the user is in an unpleasant situation, when all of his wiring diagrams are intended for 220v electromagnetic starters, and the electromagnetic starter 380v fell into the hands, then his mood may deteriorate, and there will be a need to look for another device. This is if the user does not understand this issue.

In fact, the situation is completely harmless and not even worth the spent nerves. There will be no difficulties in the event of such an issue in the connection process. The fact is that the solution is very simple. All that is needed is the bottom (according to the existing scheme) output of the coil of the electromagnetic starter 380V connect to phase L2 or phase L3and not to zero, as in the case of connecting the device to 220V.

By the way, it should be mentioned the interesting fact that the use of such a connection is even more interesting and preferable for the user. The presence of the electromagnetic starter 380v in the circuit allows you to create a circuit without any scratch. This means that, apart from the controls, the whole three phases go and come to the engine.


The 380V electromagnetic starter is a very important link in the circuit, since it is this element that performs the control of a three-phase asynchronous motor. It is very important to mention that in addition to the start and stop functions, the device performs another important function - motor overload protection.

Connection diagrams of this device are quite simple and even a user who has not had any experience with such devices can handle them.

All the technical characteristics indicated in the article above can be found in the data attached to this. device, so it’s not difficult to learn about the class of the device and the voltage at which it works electromagnetic coil.

Inclusion in the circuit of the device at 380v in some cases seems to be more preferable than using a similar device, but at 220v. There are no difficulties in changing the chain.

All schemes for connecting with ease can be found on the Internet and be guided by them without any help. The connection process is simple, however, this is already mentioned above in the article, so that the user can cope with everything. So good luck.