The modern enterprise cannot do without the use of cutting-edge technologies in the field of process automation and security provision. Without equipment that automates various operations, an enterprise risks losing competitiveness in the contemporary market. In the absence of such devices, the demand for labor increases, along with wear and accident rates of existing capacities. An important aspect of reducing depreciation costs and repair expenses is the implementation of soft starters (SS).
Problems of Operating Electric Motors
One of the main problems of modern electric motors is the high inrush current. Although there have been various theoretical solutions for reducing startup current, their practical application has been rare due to unreliability or high cost.
However, the situation has radically changed recently. Thanks to the development of microprocessors and the latest advancements in power electronics, devices known as soft starters have emerged.
Soft starters (SS) significantly increase the operational lifespan of induction motors and reduce the risk of breakdown during operation, as they eliminate destructive processes that occur during motor startup, such as insulation breakdowns and reduced bearing lifespan.
PURPOSE OF SOFT STARTERS
SS controls the voltage, gradually increasing it during the rotor's acceleration process. Thus, the electric motor slowly speeds up to its nominal revolutions, which significantly reduces inrush currents and prevents negative processes inside the motor. The starting voltage is 30 to 60 percent of the nominal.
Therefore, SS solves the following tasks:
- elimination of rotor jerks during startup;
- smooth and careful transition to nominal speed;
- extension of motor's operational lifespan;
- reduction of inrush currents by 3-4 times.
Installing SS on all powerful motors at the enterprise is a good idea.
SS also allow motors to be started in automatic mode, which reduces the time spent by personnel on these operations.
The most reliable soft starters are considered to be from companies like Schneider and Eaton, which offer an excellent price-to-quality ratio. It is most convenient to select and purchase the necessary model from the company Chastotnik, where specialists will also assist with the installation and configuration of the equipment for your motors.