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ST200 online soft starter

ST200 motor soft starter is a new type motor starting and protection device that is integrated with power electronic technology, microprocessor and automatic control. This soft starter is able to steadily start and stop motor without step change so as to avoid mechanical or electric impact resulted from using conventional starting modes such as direct starting, star-delta starting and auto voltage reducing starting, and effectively reduce starting current and distribution capacity for fear of more investment on capacity expansion.

No need to built by pass contactor with SCR controlling new technology applying----innovation and cost saving.


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Fully and perfect protection function

Configure multiple motor protect function to ensure motor long term running well.


Multiple motor protection function

v Phase missing protection

v Over heat protection

v Over current and over load protection

v Output unbalance protection

v Under voltage and over voltage protection

v Load circuit protection

v Under load protection


Minimise fault Maintenance of online soft starter without built by pass contactor

v Free of the maintaining of contactors due to reduce the by pass contactor with SCR controlling new technology.

v Reduce the installation room

v Less the wiring and connection problST200

v Labor cost saving

v No contactor fault problST200


Three-phase power supply: AC380V, 690V, 11kw to 250kw.

Provide online soft starter  cabinet for above 320kw.

Applicable motor: General squirrel cage asynchronous motor.

ST200Description
Input Power SupplyInput VoltageThree-phase 380V/690 AC

Frequency50/60Hz
Adaptive MotorSquirrel-cage three-phase asynchronous motor
Starting TimesIt is recommended not to exceed 20 times per hour.
Control Mode(1) Operation panel control. (2) Operation panel + external control.
(3) External control. (4) External control + COM control.
(5) Operation panel + external + COM control. (6) Operation panel + COM control. (7) COM control. (8) No start or stop operation.
Start Mode(1) Current-limiting to start. (2) Voltage ramp to start. (3) Torque control + current-limiting to start. (4) Torque control + voltage ramp to start.
(5) Current ramp to start. (6) Voltage current-limiting double closed-loop start.
Stop Mode(1) Soft stop. (2) Free stop.
Protective Function(1) Open loop protection for external instantaneous stop terminals.
(2) Over-heat protection for soft starter.
(3) Protection for too long starting time.
(4) Input open phase protection.
(5) Output open phase protection.
(6) Unbalanced three-phase protection.
(7) starting over current protection.
(8) Running overload protection.
(9) Under voltage protection for power voltage. 
(10) Overvoltage protection for power voltage.
(11) Protection for fault parameter setting.
(12) Load short circuit protection.
(13) Auto restart or incorrect wiring protection.
(14)Incorrect wiring protection of external control stop terminals.
AmbientPlace to be usedIndoor location with good ventilation free from corrosive gas and conductive dust.
AltitudeBelow 1000M. It have to rise the rate power when the altitude is more than 1000M.
TST200perature-30 +55 oC
Humidity90%RH without dew condensation.
Vibration<0.5G
StructureProtection ClassIP20
Cooling PatternNatural wind cooling.



Dimensional drawing                              Mounting holes schST200atic
ModelPowerCurrentExternal Installation Dimensions (mm)N.W
Dimensions (mm)
(KW)(A)HWDH1W1d(Kg)
ST200-GW3-011112331514521529885M6<6
ST200-GW3-015153031514521529885M6<6
ST200-GW3-01818.53731514521529885M6<6
ST200-GW3-022224531514521529885M6<6
ST200-GW3-030306031514521529885M6<6
ST200-GW3-037377531514521529885M6<6
ST200-GW3-045459031514521529885M6<6
ST200-GW3-05555110360210255343150M8<14
ST200-GW3-07575150360210255343150M8<14
ST200-GW3-09090180360210255343150M8<14
ST200-GW3-115115230465330255440260M8<30
ST200-GW3-132132260465330255440260M8<30
ST200-GW3-160160320465330255440260M8<30
ST200-GW3-185185370562490295535335M8<60
ST200-GW3-200200400562490295535335M8<60





ST200 online soft starter