220 V electromagnetic starters are switching devices that are designed to start the engine. They are also responsible for his defense. The characteristics of electromagnetic starters are quite different.
Some modifications are able to work in AC networks. In order to understand this issue in more detail, you should consider the main types of devices.
Application of single-phase modifications
Starters of this type are usually used in the industrial field. You can meet them on drilling as well as milling machines. They are also suitable for squirrel cage motors. The connection of the electromagnetic starter, as a rule, is carried out through a conventional relay. In this case, the rectifier will require an open type with high current conductivity.
If we consider a 5 kW engine, then the output resistance parameter must be at least 50 ohms. In turn, the threshold voltage must be at the level of 25 watts. In some cases, the connection of starters of this type is carried out through converters. In this case, kenotrons are used. They are produced of pulse and frequency type. The first option is often used in drive mechanisms. If we consider frequency kenotrons, then they are installed on power supplies.
The device of two-phase models
Models of this type are suitable for engines with manual starters. An electromagnetic 220V starter is connected to the din rail via a single-pole transceiver. An expander is required with broadband transistors. In some cases, dinistors are used.
If we consider engines of low power, then you can connect the starter without an expander. In this case, the output resistance value fluctuates around 30 ohms. On average, the threshold voltage on the winding does not exceed 15 watts. For safe use of the starter, insulators are used.
Connection of devices of three-phase type
Models of this type can only work in DC networks. A three-phase starter (electromagnetic) 220V is suitable for motors with squirrel-cage rotors. Also, devices are actively used for drilling machines and various presses. On average, the threshold voltage does not exceed 20 watts. In terms of protection systems, starters are quite different. For the safety of using the device, zener diodes are used.
If we consider a standard motor with a 3 kW rotor, then the connection is via a relay with a current conductivity of 5.7 microns. The average output impedance is 45 ohms. If we talk about engines with a power of 10 kW or more, starters are connected with powerful dinistors. It is also important to note that insulators are used with a winding. The threshold voltage parameter is 30 watts. In turn, the output impedance of the circuit does not exceed 15 ohms. It should also be noted that the overload height depends on the class of the engine protection system.
Models for Synchronous Motors
220 V starters for synchronous motors are manufactured with terminal boxes. Applied devices in presses and machine tools. The standard starter connection scheme involves the use of a single-pole transceiver. The rectifier in this case is rarely used. If we talk about the 5 kW engine, then the dynistor is selected expansion type. In this case, the output resistance of the starter does not exceed 40 ohms. In turn, the threshold voltage is at 35 watts. As a rule, the overload indicator does not exceed 3.5 A.
If we consider the engines of 15 kW, then they are connected only through switched extenders. They are usually sold with high bandwidth. In this case, the limit voltage on the winding fluctuates around 40W. In turn, the output impedance does not exceed 14 ohms. The overload indicator depends on the engine protection system.
Application of asynchronous motor starters
Starters for induction motors are available with contacts of movable and fixed type. As a rule, the device is connected through a low-wire modulator. In this case, the relay is not used. The threshold voltage parameter does not exceed 10 watts. In turn, the output impedance on the winding is at least 20 ohms. However, it is important to consider engine power.
If we talk about modifications to 5 kW, then kenotrons are used to stabilize the operation of the device. Some starters are equipped with dynistors, which are fixed to the terminal boxes. In this case, the threshold voltage parameter is about 40 watts. In turn, the output impedance is 35 ohms.
Features of high-voltage engine starting models
Starters of this type are made only with moving contacts. The scope of the devices is very extensive. Many modifications are connected to the motors via terminal boxes, which are located at the bottom of the structures. To stabilize the control process, zener diodes are used. If we talk about starters with a protection system, then they use insulators.
ABB Series Model
The starter (electromagnetic) 220V of this series is characterized by a high overload parameter. The device is used only for induction motors. For drive mechanisms, the models are ideal. The modification is directly connected via low-wire relays. Rectifiers are most often used open type. To control the engines, switched expanders are used. If we consider an 8 kW motor, then the threshold voltage parameter fluctuates around 22 watts. As a rule, the output impedance does not exceed 12 ohms.
Schneider starter
The starter (electromagnetic) 220V of this type is able to work in a network with a direct current. The overload parameter is 20 A. If we talk about 5 kW engines, the device is connected via a relay. The dinistor is only allowed to be used for expansion. After fixing the terminal box, the insulator is fixed. This electromagnetic starter is worth (market price) in the region of 16 thousand rubles.
Devices for marine vessels
Starters for marine vessels are distinguished by contacts with wire plates. In this case, transceivers are used with plates. Orthogonal modulators are used to connect devices. For stability, insulators are needed.
The kenotron on the starter (electromagnetic) 220V is suitable only for pulse type. If we talk about medium-power engines, then the threshold voltage indicator fluctuates around 40 watts. The output impedance is about 22 ohms directly. The overload indicator depends solely on the degree of protection of the engine.
25 A Modifications
The electromagnetic starter 220V 25A is produced, as a rule, with moving contacts. Many modifications are equipped with high-quality protection systems. Suitable devices for synchronous motors of various powers. If we consider the configuration of 5 kW, then the connection is through a conventional relay. Zener diodes are used to protect the device.
In some cases, compact orthogonal modulators are used. If we talk about high power engines, then the relay should be taken together with the transistor. In this case, the dinistor will require a high wired type. On average, the threshold voltage parameter is not more than 30 watts. The output resistance of this type of starter does not exceed 14 ohms.
40 A model specifications
The electromagnetic starter 220V 40A is often found on the market. Terminal boxes in many versions are made with a protection system. The bandwidth of the devices fluctuates around 5.5 microns. To connect the device, terminal boxes with contacts are used. If we consider configurations for a collector motor, then the relay can be used with low current conductivity. In this case, the output impedance will be at least 15 ohms. In turn, the threshold voltage is 35 watts.
If we consider modifications for stepper motors, then expansion dynistors are used to connect devices. In this case, the relay is used with a high current conductivity of 6 microns. The output impedance in the circuit fluctuates around 40 ohms. The threshold voltage, in turn, does not exceed 28 watts.