The CGR1000 series digital soft starter for AC motors can be widely used in loads such as fans, water pumps, conveyors, and compressors.

The CGR1000 series digital soft starter for AC motors is a new type of starting device designed using power electronics technology, microprocessor technology, and modern control theory, achieving an internationally advanced level. This product effectively limits the starting current of asynchronous motors and can be widely applied to loads such as fans, water pumps, conveyors, and compressors, making it an ideal replacement for traditional starting devices like star/delta conversion, autotransformer reduction, and magnetic control reduction.

1. Function

　　Reduce the starting current of the motor, decrease distribution capacity, and avoid capacity expansion investment.

　　Reduce starting stress and extend the service life of the motor and related equipment.

　　Multiple starting modes and a wide range of current, voltage, and time settings can adapt to various load conditions and improve processes.

2. Features

　　The starting mode can be selected based on load characteristics, allowing the motor to achieve the best starting effect.

　　High technical performance simplifies the control circuit due to the use of high-performance microprocessors and powerful software support. Consistent, accurate, and operational performance can be achieved without adjusting circuit parameters.

　　High reliability: All electrical components of the CGR1000 series soft starter have undergone strict screening, and the control part of the entire machine has passed high-temperature cycling tests and vibration tests, ensuring high reliability of the products leaving the factory.

　　Optimized structure: The unique modular structure and top-entry, bottom-exit wiring method introduce anti-interference technology, rationally layout the control board, and use I²C bus for the keyboard, making it compact and easy to integrate.

　　Keyboard setting function: The user-friendly and intuitive operation display keyboard allows for setting and modifying parameters such as start, stop, operation, and protection based on the load.

　　Protection function: The CGR1000 series soft starter has protection functions for the motor's starting process, including phase loss, overload, overcurrent, overheating, and starting time limits.

　　Rated output current (power) setting.

　　When the nominal power of the soft starter is greater than the actual load power, the actual output current of the soft starter can be modified within a certain range to match the actual load current, ensuring the starting effect and reliability protection of the soft starter for the motor.

　　Excellent soft stop performance.

　　Once you set the soft stop function, it provides a soft stop effect whether during the starting process or in operation, especially suitable for assembly line filling production lines and loads like pumps.

3. Specification Nameplate

4. Usage conditions for conventional products:

　　Power supply: mains power, self-built power station, diesel generator set;

　　Three-phase AC: 380V (-20%, +15%), 50Hz;

　　Applicable motors: general squirrel-cage asynchronous motors (wound motors can be negotiated);

　　Starting frequency: standard products are recommended to start and stop no more than 15 times per hour (depending on the load);

　　Cooling method: 320kW and below power is natural air cooling, 400kW and above power is forced air cooling;

　　Usage conditions: The CGR1000 series soft starter must be connected with bypass contactors and necessary motor protection devices during use;

　　Protection level: IP00;

　　Environmental conditions: If the altitude exceeds 2000 meters, the capacity should be reduced accordingly;

　　Ambient temperature between -25℃ and +40℃;

　　Humidity not exceeding 95% (20℃±5℃), no condensation, no flammable, explosive, or corrosive gases,

　　no conductive dust; indoor installation with good ventilation; vibration less than 0.5G.

　　5. Working principle

　　The CGR1000 series motor soft starter uses three pairs of anti-parallel thyristors connected in series in the stator circuit of the AC motor. By utilizing the electronic switching action of the thyristors and controlling their trigger angle through a microprocessor, the degree of thyristor conduction is changed, thereby altering the input voltage of the motor to achieve the purpose of soft starting. Once the starting is complete, the soft starter outputs the rated voltage, at which point the bypass control output signal controls the three-phase bypass contactor KM to engage, connecting the motor to the power grid for operation.

6. Model specifications

　　Installation method and dimensions