Electromagnetic starters 220 V are switching type devices that are designed to start the engine. They are also responsible for its protection. The characteristics of electromagnetic starters are quite different.
Some modifications are able to work in an alternating current network. 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, as a rule, are used in the industrial field. You can meet them on drilling and milling machines. They are also suitable for motors with squirrel-cage rotors. The connection of an electromagnetic starter, as a rule, is carried out through a conventional relay. In this case, the rectifier will need an open type with high current conductivity.
If we consider a 5 kW motor, 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 casesconnection of starters of this type is carried out through converters. In this case, kenotrons are used. They are produced in 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.
Device of two-phase models
Models of this type are suitable for engines with manual starters. The 220V electromagnetic starter is connected to the DIN rail through a single-pole transceiver. An expander will be required with broadband transistors. In some cases, dinistors are used.
If we consider low power motors, then you can connect the starter without an expander. In this case, the output resistance indicator fluctuates around 30 ohms. On average, the threshold voltage on the winding does not exceed 15 watts. Insulators will be used for safe use of the starter.
Connecting three-phase devices
Models of this type can only work in a DC network. Suitable three-phase starter (electromagnetic) 220V for motors with squirrel-cage rotors. Also, devices are actively used for drilling machines and a variety of presses. On average, the threshold voltage indicator 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 engine withrotor of 3 kW, then the connection is made through a relay with a current conductivity of 5.7 microns. On average, the output resistance parameter is 45 ohms. If we talk about engines with a power of 10 kW or more, then the starters are connected with the participation of powerful dinistors. It is also important to note that insulators are applied with windings. The threshold voltage parameter is 30 W. 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 produced with terminal boxes. Devices are used in presses and machine tools. The standard starter wiring diagram assumes the use of a single-pole transceiver. The rectifier is rarely used in this case. If we talk about a 5 kW motor, then the dinistor is selected as an expansion type. In this case, the output impedance of the starter does not exceed 40 ohms. In turn, the threshold voltage is at the level of 35 watts. As a rule, the overload indicator does not exceed 3.5 A.
If we consider 15 kW motors, they are connected only through switched expanders. As a rule, they are sold with high bandwidth. In this case, the limiting voltage on the winding fluctuates around 40W. In turn, the output impedance does not exceed 14 ohms. The overload rate depends on the motor protection system.
Application of startersinduction motors
Starters for asynchronous motors are available with moving and fixed type contacts. As a rule, the device is connected via a low-wire modulator. In this case, the relay is not used. The threshold voltage parameter does not exceed 10 W. In turn, the output resistance on the winding is at least 20 ohms. However, it is important to consider the power of the engine.
If we talk about modifications to 5 kW, then kenotrons are used to stabilize the operation of the device. Some starters are equipped with dinistors, which are fixed on the terminal boxes. In this case, the threshold voltage parameter is approximately 40 W. In turn, the output impedance is 35 ohms.
Features of high-voltage motor starting models
Starters of this type are produced only with moving contacts. The scope of devices is very extensive. Many modifications are connected to the motors through terminal boxes, which are located at the bottom of the structures. Zener diodes are used to stabilize the control process. If we talk about starters with a protection system, then they use insulators.
ABB series model
Starter (electromagnetic) 220V of this series has a high overload parameter. The device is used only for asynchronous motors. For drive mechanisms, the models are ideal. The modification is directly connected through low-wire relays. Rectifiers are most oftenopen types are used. Switched expanders are used to control motors. 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 Launcher
Starter (electromagnetic) 220V of this type is capable of operating in a DC network. The overload parameter is 20 A. If we talk about 5 kW motors, then the device is connected through a relay. Dinistor is allowed to use only expansion type. After fixing the terminal box, the insulator is fixed. This electromagnetic starter costs (market price) in the region of 16 thousand rubles.
Devices for marine vessels
Marine starters feature wire plate contacts. In this case, the transceivers are used with plates. Orthogonal type modulators are used to connect devices. Insulators are needed for stable operation.
Kenotron for starter (electromagnetic) 220V is only suitable for pulse type. If we talk about medium power motors, then the threshold voltage indicator fluctuates around 40 watts. The direct output impedance is about 22 ohms. The overload rate depends solely on the degree of protection of the engine.
Modifications for 25 A
The electromagnetic starter 220V 25A is produced, as a rule, with moving contacts. Many modifications are equipped with high-qualityprotection systems. These devices are suitable for synchronous motors of various capacities. If we consider configurations for 5 kW, then the connection is made through a conventional relay. Zener diodes are used to protect the device.
In some cases compact orthogonal type modulators are used. If we talk about high power motors, 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 no more than 30 watts. The output impedance for starters of this type does not exceed 14 ohms.
Characteristics of 40 A models
Electromagnetic starter 220V 40A is often found on the market. Terminal boxes in many modifications are made with a protection system. The throughput of 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 W.
If we consider modifications for stepper motors, then expansion dinistors 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 W.
