Despite the high quality of modern electric motors (25 years of operation without major repairs - a guarantee of well-known manufacturers), you can extend its service life, as well as reduce the cost of energy consumed by them, by installing a special device that allows:
- Carry out a smooth start of an asynchronous electric motor.
- Gradually decelerate and stop the power plant shaft.
This system, called altistart , is available in a wide variety of modifications. The most popular and demanded of them can be found using the online catalog on the website of the official distributor of Schneider Electric in Russia.
Schematic diagram of the soft starter
As shown by many years of practice and laboratory tests, the main reason for the premature failure of asynchronous electric motors is the action of a physical law, which states that the moment of force developed by an electric motor is proportional to the square of the voltage applied to it. In practice, it is conditioned by the fact that the following are created:
- Sudden jerking of the rotor when starting.
- Negative physical bending effects on the shaft when stopped.
Installed as an interrupter supplying voltage to the motor winding altistart allows for a gradual increase in current and voltage at start, as well as in reverse order for stop. At the same time, some models of soft starters are equipped with timers and software for setting the required operating modes of the electric motor. They have automatic protection and turn off the equipment in case of emergency.
You can familiarize yourself with the technical characteristics of devices for the soft start (stop) of asynchronous electric motors manufactured by Schneider Electric using the catalog of the supplier of this type of equipment to the domestic market. The presented models fully comply with the declared parameters and have a manufacturer's quality guarantee.
