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    75 hp (55 kW) Soft starter, 110 A, 3ph 220v/380v/480v

    5 out of 5 based on 4 reviews | Write a review
    High quality 75 hp soft starter, 55 kW three phase 220v, 380v, 480v AC motor soft starter to protect motor from inrush current impact, buy it from manufacturer directly with wholesale price.
    SKU: GS-055
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    75 hp motor soft starter, 55 kW three phase 220v, 380v, 480v, 690v for choice.

    Model GS2-055 (220v, 240v), GS3-055 (380v, 400v, 415v), GS4-055 (460v, 480v), GS6-055 (575v, 690v).
    Capacity 75 hp (55 kw)
    Current 110 amps at 380v/480v, 230 amps at 220v, 70 amps at 690v
    Weight 5 kgs
    Dimension 270*146*160 mm
    Input Voltage Three-phase 240v, 440v, 480v, 660v AC
    Frequency 50Hz/ 60Hz
    Adaptive Motor Squirrel-cage three-phase asynchronous motor
    Starting Times It is recommended not to exceed 20 times per hour.
    485 Communication DB9 interface, male plug, ① is RS485+, ⑥ is RS485-
    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 of the soft starter.
    12. Load short circuit protection.
    13. Auto restart or incorrect wiring protection.
    14. Incorrect wiring protection of external control stop terminals.
    Ambient Place to be used Indoor location with good ventilation free from corrosive gas and conductive dust.
    Altitude Below 1000M. It has to increase the soft starter rate power when the altitude is more than 1000M.
    Temperature -30 +55 oC
    Humidity 90%RH without dew condensation.
    Vibration <0.5G
    Structure Enclosure IP 20
    Cooling Natural wind cooling.



    55KW Soft Starters Details

    Soft starter starting fault and its handling method part 1

    1. When the user using the soft starter, the display screen has no display or there is messy code and the soft starter does not work. The causes for the malfunction may be:
      In the use process, the vibrations of the soft starter caused by the external components make the internal connection of the soft starter loose. (Open the soft starter cover to re-insert the screen connection.)
      Soft starter control board failure. (Connect with the manufacturers to replace the control panel.)
    2. When the soft starter is in the starting load, there is overtime starting phenomenon. The soft starter stops working and the motor is free to stop. The causes for the malfunction are:
      Parameter settings are unreasonable. (Reset the parameters, appropriately rise the starting voltage and appropriately lengthen the time.)
      Start at full load. (Minimize the load when starting.)
    3. In the starting process, if there is superheat malfunction, the light is on, and the soft starter to stop working:
      Frequent start results in excess temperature, causes soft starter overheating protection action. (The number of starts of the soft starter shall be controlled at no more than 6 times per hour, especially pay attention to the heavy load.)
      During the starting process, the protective element is actuated so that the contactor cannot be bypassed and the soft starter is operated for a long time, causing a protective action. (Check the peripheral circuit.)
      The heavy load and the over-length starting time cause overheating protection. (When starting, reduce the load as much as possible.)
      Soft starter parameter setting is unreasonable. Time is too long, and the starting voltage is too low. (Increase the starting voltage.)
      The soft starter's cooling fan is damaged and does not work properly. (Replace the fan.)
    4. In the use process of the users, there are phenomena that the starting is completed and the bypass contactor does not have pull-in phenomena. The causes for the malfunction may be:
      In the starting process, the protection device is malfunctioning due to the setting. (The protective device can be reset.)
      In the debugging, the soft starter parameter settings are unreasonable. (Mainly for the soft starter below 75hp, reset the parameters of the soft starter.)
      Poor control line contact. (Check control line.)

    Soft Starter Works with a Bypass Contactor

    Soft starter works with a bypass contactor saving energy by eliminating thyristor losses during the run. The bypass contactor shunts the current flowing through the soft starter switch circuit to reduce heat accumulation in the soft starter power electronics during motor operation. This provides maximum efficiency and prolongs the life of soft-start switching components because they only work during the start and stop cycles of the motor.

    How to Change the Soft Starter Rated Current

    Existing reviews of 75 hp (55 kW) Soft starter, 110 A, 3ph 220v/380v/480v
    I am using your soft starter on an irrigation pump.
    I will use my contactor from my pump to start the soft starter. When my pump contactor kicks in the soft starter starts when I push the run button it ramps up for a few seconds and shut down. the contactor is still on. I need it start when the pump contactor kicks in and stay running until the pump has finished. I am not using a bypass contactor. can you help with this installation?
    From: rayparker | Date: 29/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The soft starter needs to be used with a bypass contactor. You need a 160A bypass contactor with a coil voltage of ≤250VAC.  You can refer to our demo video:
    We need help soft starter wiring for remote start
    We need help wiring for remote start.
    We tried the way it is in your schematic and it comes on without hitting remote start.
    From: norbert | Date: 07/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Regarding the external remote control of the soft starter, you need to change the FB to 1 or 2 to enable external control of start and stop.
    I need a bypass contactor.
    I am trying to locate the bypass contactor that is needed for soft motor starter Model: EM-GS4-055.
    From: Della | Date: 27/07/2022
    Was this review helpful? Yes No (0/0)
    ATO Responded
    For soft motor starter Model: EM-GS4-055, we recommend using 150A bypass contactor ATO-ACCON-150A, pls see specs and price on: -ac-contactor
    High quality 75hp soft starter
    I am looking at your “75 hp soft starters“, what is the input current reduction using the soft starter? Your spec does not say if it reduces 20%, 50%, or what? Some soft starters reduce current to 200% nominal (300% inrush vs 600%). What do yours do?
    From: Mroz | Date: 20/07/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    For using our 75 hp soft starter, the inrush current would be 200%-400% nominal current, when using different motor capacity loads.
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