SJR3 3000 Soft starter Series

Professional soft starter and frequency inverter supplier and manufacturer in China

37KW 660V soft starter China

Contact Information

Product Overview

The SJR3-3000 series has a built-in bypass motor soft start and integrated bypass contactor, which greatly reduces the construction cost of the application. It is different from the installation and wiring maintenance of the external soft start, which is different from the conventional soft start. It is also different from the high heat conflict of the thyristor online soft start. This series also supports the bus function of Modbus protocol to support large-scale industrial control layout. 

Product Features

Easy to control: support a variety of communication protocols; operation panel can be used outside; programmable output: 4-20MA DC analog output

Long life: compared to intense heating, heavy harmonic pollution and high module consumption caused by online module, this type of soft starter has a longer using life and more safety

Liquid crystal display: this display is more intuitive and convenient.

No need for control circuitry: it greatly slashes the material cost 

Space saving: compared with star-delta starter and self coupling decompression starter, the built-in bypass greatly reduces space requirement for the cabinet, so the user can arrange the electrical equipment in higher density, thereby reducing the cost

Labor saving: compared with star-delta starter and self coupling decompression starter, greatly cut down the design and installation time for no need of deploying line circuitry.


Electrical parameters of SJR3 series softstarter

Three-phase power supply Voltage(AC) 380V±15%(220V and 660V optional)
Frequency  50Hz/60Hz
Applicable motor Squirrel cage three-phase asynchronous motor
Starting frequency  When the motor is fully loaded, it shall not start more than 4 times per hour;
Less than 10 times per hour with no or little load
Protective class IP20
Anti shock  Accorded with IEC68-2-27:15g, 11ms
Seismic capacity Vibration intensity is 0.5G or less at an altitude less than 3000 meters
Ambient temperature The capacity needn't be reduced when the working temperature is between 0℃ and
40℃(At the temperature between 40℃ and 60℃, the current should be decreased 2% whenever the temperature is 1℃ higher.)
Storage temperature -25℃~70℃
Ambient moisture 93% no condensation or drip, in line with IEC68-2-3
Maximum working  The capacity will not be reduced when the working height is less than 1000 meters( If 
is higher than 1000 meters, the current will be decreased 5% whenever it is 100 meters higher.)
Cooling means  Natural cold wind
Installation angle  Vertical installation and the angle of tilt should be in the range of ±10°

Physical display of SJR3-3000 series softstarter

The list of rated power for SJR3-3000 series

The list of rated power of SJR3-3000 series 

Appearance of SJR3 series ac motor softstarter


Application area of SJR3 series softstarter

  NO. Title Download Link
1. SJR3-3000 series motor soft starter Download Link
2. Instruction Manual-SJR3-3000 Download Link

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