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The technicians of Yueqing Qide Electric are the early leaders in developing liquid resistance starters. This product can improve the starting performance of large and medium-sized wound AC motors. It is a new starter developed by The liquid resistor is inserted in series into the loop and the resistance value is automatically and steplessly adjusted to always meet the requirements of the mechanical characteristics of the motor on the resistance value in series. This allows the motor to achieve a smooth start without impact while obtaining maximum starting torque and minimum starting current. The rear rotor circuit is automatically shorted.
Suitable for ball mills, fans, rolling mills, water pumps and other heavy-load winding AC asynchronous motors in the building materials, chemical, metallurgy and other industries. It solves the problem of over-speeding of large and medium-sized motors. This product has been used as the latest replacement product of the starter in More than a thousand companies across the country use its excellent starting performance and are generally well received by users.
Working Principle
A three-phase star-connected liquid resistor is inserted in series into the rotor circuit of the controlled wound-type asynchronous motor. The liquid resistor is automatically put in when the motor is started and the liquid resistor is switched on within a predetermined time. The value changes from large to small, so that the motor can start smoothly without impact when it is close to the rated current and maximum torque. The start end contactor short-circuit the rotor circuit.
This starting control device does not have high requirements on the power grid and will not produce harmonics to affect the power grid.
Especially suitable for heavy load starting.
★Starting current is small and constant, general starting current. Times the rated current reduces the motor starting temperature rise and effectively extends the service life of the motor
★There is almost no voltage drop during the starting process, no impact on the power grid and no impact on other electrical equipment
★The smooth starting process has no impact on mechanical equipment The impact extends the service life of the machine
★Can be started continuously - overcoming the problem of frequency-sensitive starters being unable to start continuously
★Can be started at low voltage: when the motor is on, the motor is on. Can start smoothly
★Simple structure, reliable installation, easy maintenance and all operations are automated
★Has various protection functions such as starting timeout, loss of pressure, over-travel, over-temperature, low liquid level, etc.
★ The electro-hydraulic box is made of imported polypropylene material and adopts one-time molding or melt welding to avoid cracks that are easy to occur in bonding. The polypropylene material can withstand high temperatures of ℃ for a long time, ensuring the service life of the electro-hydraulic box
★The electro-hydraulic box adopts three-dimensional The structural form of partially connected phases can completely balance the three-phase resistance, thereby ensuring the balance of motor starting and the smoothness of the starting process
★The screw rod adopts a trapezoidal thread to make the transmission mechanism run smoothly, ensuring the smoothness of motor starting and Guarantee the service life of the screw rod
★The main circuit on the star point contactor adopts the triangle connection method to reduce the current flowing through each main contact by more than % to ensure the service life of the star point contactor
★This starting control device occupies The site is small, the starting current is small, the starting is smooth and impact-free, and the external connections and fault links are reduced. Reliable operation and convenient operation
★The heating type suitable for areas with low temperatures is designed with low-temperature automatic heating and overheating automatic cut-off functions.
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