FST-3000 Built-in Bypass Soft Starter 5.5-630KW
The FST-3000 series soft starter (5.5-630KW) is a new generation built-in bypass motor starter for 3-phase AC motors. Integrating bypass contactor and thermal relay, it significantly reduces equipment cost and panel size compared to traditional external bypass soft starters. This intelligent soft starter features strong anti-interference capability, comprehensive protection functions, multiple start/stop modes (current limiting, voltage ramp, DC braking), and remote communication support. With LCD display showing real-time current, voltage, and fault information, it is ideal for pumps, fans, compressors, and conveyors in textile, paper, cement, and food processing industries.
Power range
5.5kw~630kw
Input voltage
380V 3 phase to 3 phase
Product Overview
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Textile
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Paper Making
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Sand Making
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Machine Tools
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Packaging
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Food
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Fans
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Pumps
- Built-in bypass contactor and thermal relay, reducing cost and size;
- Multiple starting modes: current limiting, voltage ramp, kick start, jog start;
- Multiple stop modes: free stop, soft stop, DC braking;
- Comprehensive protection: input/output phase loss, overload, overcurrent, imbalance, over/under voltage, overheating;
- Large LCD display with Chinese/English interface;
- Remote communication protocols support;
- Strong anti-interference performance.
A. Soft Starter Principle Explanation: "The FST-3000 soft starter employs thyristor-based voltage control technology, gradually increasing the motor voltage during startup. Compared to direct starting, inrush current is reduced by 60-70%. The built-in bypass contactor automatically short-circuits the thyristor after startup, eliminating heat generation and improving efficiency..."
B. Detailed Application Scenarios: "Suitable for equipment requiring soft starting to prevent mechanical stress and water hammer, such as centrifugal pumps, fan systems, compressors, and conveyor belts. Also suitable for textile machinery, paper mills, cement plants, and food processing equipment..."
C. Comparison with Frequency Converters: "Unlike frequency converters, the FST-3000 soft starter is designed for motor starting applications that do not require speed control. It provides a cost-effective soft start/stop solution while maintaining grid frequency operation..."
Technical Specifications
| Control power supply | AC 380V(-10% ~ 15% ), 50hz/60hz (provided internally, users do notneed to connect externally) | |
| Input power supply | AC 380V(﹣10%~15%),50Hz/60Hz | |
| Applicable motor | General squirrel cage AC asynchronous motor | |
| Starting mode | Current limiting starting; Voltage ramp start; Sudden tripping current limiting start; Jump voltage ramp start; Inching start;Swing start | |
| Stop mode | Free shutdown; Soft shutdown; DC brake stop | |
| Relay output | Two way programmable output relay | |
| Starting frequency | Not more than 15 times in an hour | |
| Protection function | Input phase loss, startup overload, operation overload, overcurrent, current imbalance, overvoltage, undervoltage, overheating, output phase loss, etc | |
| Display | Large screen LCD, Chinese and English display modes. Display current three-phase output current, grid voltage, fault type, system parameters and operating parameters | |
| Degree of protection | IP20 (55kW and below) /IP00 (75kW and above) | |
| Cooling mode | Forced air cooling / natural cooling | |
| Installation method | Wall mounted | |
| Environment condition | Equipment site | Indoor, no direct sunlight, no dust, corrosive gas, flammable gas, oil mist, water vapor, dripping water or salt, etc |
| ambient temperature | -25℃~+40℃ | |
| ambient humidity | Below 90% (no condensation) | |
| Vibration intensity | Below 0.5g (acceleration) | |
| Altitude | Below 1000m (derating is required if the altitude exceeds 1000m) | |
| Adapter motor | 15~320KW | |
Model Selection Guide
| Model no. | Power |
Rated current |
Input voltage | Size(mm) | Installation size(mm) | G.W | N.W |
| FST-3005 | 5.5Kw | 10 | 380V | 185*348*210 | 140*305 | 8.1KG | 6.1KG |
| FST-3007 | 7.5Kw | 15 | 380V | 185*348*210 | 140*305 | 8.2KG | 6.2KG |
| FST-3011 | 11Kw | 24 | 380V | 185*348*210 | 140*305 | 8.3KG | 6.3KG |
| FST-3015 | 15Kw | 30 | 380V | 185*348*210 | 140*305 | 8.45KG | 6.45KG |
| FST-3018 | 18.5Kw | 37 | 380V | 185*348*210 | 140*305 | 8.5KG | 6.5KG |
| FST-3022 | 22Kw | 45 | 380V | 185*348*210 | 140*305 | 8.55KG | 6.55KG |
| FST-3030 | 30Kw | 60 | 380V | 185*348*210 | 140*305 | 8.6KG | 6.6KG |
| FST-3037 | 37Kw | 75 | 380V | 185*348*210 | 140*305 | 8.65KG | 6.65KG |
| FST-3045 | 45Kw | 90 | 380V | 185*348*210 | 140*305 | 8.65KG | 6.65KG |
| FST-3055 | 55Kw | 110 | 380V | 185*348*210 | 140*305 | 8.7KG | 6.7KG |
| FST-3075 | 75Kw | 150 | 380V | 185*348*210 | 140*305 | 8.8KG | 6.8KG |
| FST-3090 | 90Kw | 180 | 380V | 300*605*250 | 215*536 | 30KG | 23.5KG |
| FST-3110 | 110Kw | 230 | 380V | 300*605*250 | 215*536 | 30.1KG | 23.6KG |
| FST-3132 | 132Kw | 250 | 380V | 300*605*250 | 215*536 | 30.3KG | 23.8KG |
| FST-3160 | 160Kw | 300 | 380V | 300*605*250 | 215*536 | 30.4KG | 23.9KG |
| FST-3185 | 185Kw | 360 | 380V | 300*605*250 | 215*536 | 30.5KG | 24KG |
| FST-3200 | 200Kw | 400 | 380V | 340*661*260 | 265*590 | 42.2KG | 31.2KG |
| FST-3225 | 250Kw | 480 | 380V | 340*661*260 | 265*590 | 42.3KG | 31.3KG |
| FST-3280 | 280Kw | 560 | 380V | 340*661*260 | 265*590 | 42.5KG | 31.5KG |
| FST-3315 | 315Kw | 640 | 380V | 340*661*260 | 265*590 | 42.6KG | 31.6KG |
| FST-3355 | 355Kw | 700 | 380V | 340*661*260 | 265*590 | 42.8KG | 31.8KG |
| FST-3400 | 400Kw | 790 | 380V | 340*661*260 | 265*590 | 42.9KG | 31.9KG |
| FST-3500 | 500Kw | 1000 | 380V | 340*661*260 | 265*590 | 43KG | 32KG |
| FST-3630 | 630Kw | 1200 | 380V | 340*661*260 | 265*590 | 43.2KG | 32.2KG |
| Model no. | Current | Power | ||
| 220V | 380V | 660V | ||
| FST-3018 | 38A | 9Kw | 18.5Kw | 30Kw |
| FST-3022 | 44A | 11Kw | 22Kw | 37Kw |
| FST-3030 | 60A | 15Kw | 30Kw | 45Kw |
| FST-3037 | 74A | 18.5Kw | 37Kw | 55Kw |
| FST-3045 | 100A | 22Kw | 45Kw | 75Kw |
| FST-3055 | 110A | 30Kw | 55Kw | 90Kw |
| FST-3075 | 150A | 37Kw | 75Kw | 110Kw |
| FST-3090 | 160A | 45Kw | 90Kw | 132Kw |
| FST-3110 | 200A | 55Kw | 110Kw | 160Kw |
| FST-3132 | 250A | 75Kw | 132Kw | 200Kw |
| FST-3160 | 300A | 90Kw | 160Kw | 250Kw |
| FST-3200 | 360A | 110Kw | 200Kw | 355Kw |
| FST-3250 | 480A | 132Kw | 250Kw | 400Kw |
| FST-3315 | 590A | 160Kw | 315Kw | 560Kw |
| FST-3355 | 660A | - | 355Kw | 630Kw |
| FST-3400 | 790A | 200Kw | 400Kw | 710Kw |
| FST-3500 | 1000A | 250Kw | 500Kw | 900Kw |
| FST-3630 | 1200A | 355Kw | 630Kw | - |
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