Product description

SMGRQ series of intelligent motor soft starter is the use of power electronics technology, microprocessor technology and modern control theory of production technology with the current international advanced level of the new starter The product can effectively limit the induction motor starting voltage and current. Can be widely used in fans, pumps, shredders, ball mill, mixer, transmission and compressor heavy equipment, star / delta conversion, since the lotus root buck, magnetic step-down start-up equipment such as the ideal step-down products.

This product meets: GB14048.6 standard

Structural features

○ Six kinds of starting modes: ① Current limiting mode starting ② Voltage mode starting ③ Jumping plus current limiting mode starting ④ Sudden voltage mode start ⑤ Current ramp mode start ⑥ Double closed loop mode start. The voltage ramps the starting mode to obtain the maximum output torque. The current limiting start-up mode provides maximum limiting start-up current, providing a smooth and gradual start-up of the motor.

○ Parking mode: voltage ramp soft stop, free stop.

Programmable delay start mode, programmable interlock control, programmable fault contact output relay (passive contact).

○ No phase sequence requirement for input power.

○ start time, stop time can be programmed to modify.

○ With a variety of protection features: over-current, three-phase current imbalance, overheating, input phase loss, output phase loss, over voltage, under voltage, motor overload, stalled and other protection.

○ Dynamic fault memory function, easy to find the cause of the failure can record up to nine faults

○ Find on-line running apparent power, running overload ratio.

○ Modbus field bus function, full dynamic control monitoring starter, easy to network.

○ Chinese character display: LCD screen display a variety of operating parameters, programming and fault status with text prompts.

Working principle

SMGRQ control core is the microprocessor DSP. The microprocessor control system can start and protect the motor. DSP microprocessor phase angle trigger control to reduce the voltage applied to the motor, and then by controlling the voltage and current on the motor, smooth increase in motor torque, until the motor accelerates to full speed operation. This type of starting reduces the starting current of the motor, reduces the impact on the grid and the motor itself, and reduces the mechanical impact on the mechanical devices connected to the motor to prolong the life of the device and reduce malfunctions and downtime.

Typical Applications

○ pump one by one soft stop function to stop the water hammer to ease the pump appears, saving the cost of system maintenance.

○ Ball mill one by one voltage ramp start, reduce the gear torque wear and tear, reduce maintenance workload, not only saves time, but also save money.

○ fan 11 to reduce belt wear and mechanical shock, saving the cost of maintenance.

○ compressor one by one use of current limiting, to achieve a smooth start, reducing motor heating, extend the service life.

○ Belt conveyor through the soft start to achieve a smooth and gradual start process, to avoid product displacement and liquid spill.

○ products are widely used in thermal power, water, transmission and distribution equipment, metallurgy, chemicals, mining, construction and other industries.

Performance

○ meet the standards: GB14048.6-2008 5.5-600kw China Compulsory Certification 3C products.

○ Protection class: IP20 (IP40 can be protocol).

○ seismic capacity: 3000 meters above sea level, the vibration device 0.5G or more.

○ Impact resistance: 15kg11ms.

○ Ambient temperature: -30-55 ℃.

○ Humidity: 95% non-condensing or dripping. KJR3000A series of soft starter for AC 50Hz, ~ 220V, 400V, 660V, 1140V, 5.5 ~ 600kw

System control function

○ intelligent: with programmable input and output contacts, built-in intelligent load of various procedures, judged to drag the system operating conditions.

Fieldbus Modbus can meet the individual needs of users.

○ comes with Chinese menu to achieve man-machine dialogue, set a variety of parameters and programming.

○ Analog current signal 4-20mA and 0-20mA.

○ With keyboard control and remote control switching function, in order to ensure the safety of equipment maintenance personnel.

○ delay relay function, delay relay output contact time programmable.

○ fault output relay, if the system fails this relay action, fault shutdown from the reset programmable.

○ Self-control bypass contactor output relay, when the start process is complete, the relay action.

○ Delay start function, can set 0 ~ 999S delay start, and a countdown display I two-line control mode is valid).

○ can achieve a soft start drag more than one motor.

Fieldbus function

○ Fieldbus Modbus protocol: The machine can use the built-in RS485 interface module, in line with the standard Modbus protocol, which features:

The user can select the appropriate baud rate according to the communication distance.

Up to 64 soft starters can be controlled.

Standard Modbus customization is user-friendly.

The RS485 module is completely isolated from the control micro- controller to ensure that the communication does not interfere with the normal operation of the device.

Keyboard description

Basic Wiring Schematic

Product Structure Dimension Chart (mm)