- Stock: In Stock
- Model: GS400
- Weight: 1.00
- SKU: GS400
High capacity 500 hp soft starter is designed to control motor soft starting and soft stopping. Factory price 400kW 3 phase 380V, 400V, 440V, 460V, or 480V AC motor soft starters are available online.
| Model | GS3-400 (380v, 400v, 440v), GS4-400 (460v, 480v) | ||
| Capacity | 500 hp (400 kw) | ||
| Current | 800 amps | ||
| Weight | 45 kgs | ||
| Dimension | 590*330*245 mm | ||
| Input | Voltage | Three-phase 240v, 400v, 480v, 690v 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 |
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| Start Mode |
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| Stop Mode |
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| Protective Function |
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| 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. | ||
Details
Tips: Why do we need soft starters?
The soft starter is essential because directly starting a large motor creates a massive inrush current—5 to 8 times the motor's full-load current—which causes a significant voltage dip on the electrical network, disrupting other equipment operating on the same power supply. Simultaneously, the immediate application of full torque delivers a sharp mechanical shock to the driven load, such as pumps, conveyors, or fans, violently jerking gears, belts, and shafts, which accelerates wear and can lead to premature failure. The soft starter eliminates this dual problem by gradually ramping up the voltage and torque, transforming a damaging, abrupt start into a smooth, controlled acceleration that protects both the electrical system and the mechanical equipment.