Starting rheostats are used in electrical systems to control the starting current of electric motors and reduce the load on the electrical network.
Depending on the type of machine being driven and the environmental conditions at the installation site, the most suitable type of starting rheostat can be selected:
Starting rheostats are manufactured individually in accordance with the customer's technical specifications.
Air-cooled starting resistors provide step-by-step starting of asynchronous electric motors with phase rotors with a capacity of up to 6.4 MW.
They consist of resistive blocks mounted in a housing with IP00, IP21, IP23 protection rating. Other types of housings can be manufactured depending on customer requirements. Additionally, they can be equipped with a special step control system installed in a separate distribution cabinet.
Advantages of air-cooled starting rheostats:
Areas of application:
An oil rheostat provides step-by-step motor start-up by removing step resistors from the rotor circuit as it accelerates. Suitable for use in mechanisms with high-power motors where frequent starts are not required.
The resistive blocks are assembled from cast iron resistive elements and are located in a tank with transformer oil, which acts as an insulator and a medium that absorbs the heat generated by the resistors during the starting process.
Oil starting rheostats allow engines with a power of up to 6400 kW to be started.
Advantages of oil starting rheostats:
Areas of application:
Liquid starting rheostats provide smooth, stepless starting of motors.
This system is mainly used where the process does not require speed control, but the application requires a very high starting torque. The robust design guarantees high operational reliability and a long service life.
The resistor and heat storage medium is an electrolyte (a solution of Na2CO3 in water).
A system of movable electrodes controlled by a programmable controller allows the resistance of the rheostat to be smoothly reduced as the motor accelerates.
Liquid starting rheostats allow motors with a power of up to 13,500 kW to be started.
Advantages of liquid starting rheostats:
Areas of application:
