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ST300 Online Soft Starter control panel (online soft starter cabinet)

ST300 online soft Starter cabinet is new generation soft starter panel, that with completely function, easy operation, no need commissioning, minimum the maintenance. This products break through traditional soft starter cabinet configuring, which need built in soft starter and by pass inside with high cost.

ST300 online soft starter control panel cabinet is a economic , practical and convenience one, very popular in various industrial application filed.


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v Provide soft starter and motor protector function, equipped online protection function, 3 input and 3 output design.

v Reduce the motor starting current, and reduce the investing cost of power distributor capability.

v Reduce machine starting stress to extend machine working service lifespan.

v No request the secondary wiring, configure multiple protection function, reliability function and long service time is available.

v LCD Chinese and English display for easy operating, testing and maintain.

v Compatibility with kinds of communication mode.

v Fully digital control system with kinds starting mode

v Apply micro control unit, fuzzy control and big current 0 point separate technology.

v Strong load adaptability and strong EMC capability, high running reliability

v Easy operation and maintaining.

v No using the Ac contactor to enhance the reliability.

v Accept widely voltage input, ±15% tolerance.

v Strong motor protection

v Built it MCCB, also configure short circuit protection.

v Configure interval delay starting function to avoiding start frequently.

v Input and output phase missing protection.

v Online running monitoring.


Three-phase power supply: AC380V, 440V 690V, 11kw to 600kw

ST300Description
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 ModeOperation 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.
TST300perature-30 +55 oC
Humidity90%RH without dew condensation.
Vibration<0.5G
StructureProtection ClassIP20
Cooling PatternNatural wind cooling.



ST300 Online Soft Starter control panel (online soft starter cabinet)


ST300 Online Soft Starter control panel (online soft starter cabinet)