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The Anyhz FST-3000 is a new generation built-in bypass soft starter designed for 3-phase AC induction motors from 5.5kW to 630kW. This innovative motor soft starter integrates the bypass contactor and thermal overload relay internally—eliminating external components, reducing panel size by 40%, and simplifying installation.
Unlike traditional soft starters that require separate bypass contactors, the FST-3000's built-in bypass design automatically transfers the motor to line power after starting, minimizing heat generation and energy loss during run mode. With 6 intelligent starting modes, comprehensive protection functions, and LCD display with Chinese/English interface, this electronic soft starter provides smooth, controlled acceleration while reducing starting current by 60-70%—protecting mechanical equipment and extending motor life.
Why Choose FST-3000 Soft Starters?
All-in-One Design: Built-in bypass contactor + thermal relay reduces external wiring and panel space by 40%
6 Starting Modes: Current limiting, voltage ramp, kick start, and more for any soft starter application
Smart Stop Functions: Free stop, soft stop, and DC braking for controlled deceleration
Easy Operation: Large LCD display shows current, voltage, faults, and parameters in Chinese or English
Communication Ready: Modbus RTU standard for remote monitoring and SCADA integration
Wide Power Range: 5.5kW to 630kW covers applications from pumps to large compressors
High Efficiency: >99.5% efficiency in bypass mode with near-zero power loss
Advanced Soft Starter Technology
Built-in Bypass Contactor
The integrated bypass contactor eliminates the need for external contactors and wiring traditionally required with motor soft starters. After the motor reaches full speed, the internal contactor automatically bypasses the thyristor power stage, running the motor directly on line power.
Electromechanical bypass contactor rated for continuous duty
Automatic transfer at 95-98% of nominal speed
Zero power loss in bypass mode (vs 2-4% with solid-state only)
Thyristor protection during bypass operation
Integrated Thermal Overload Relay
The built-in electronic thermal relay provides Class 10 motor protection without external overload relays. Using advanced thermal modeling algorithms, this intelligent soft starter calculates motor heating based on actual current and time.
Class 10A, 10, 20, 30 trip curves selectable
Phase imbalance and single-phasing protection
Ground fault detection (GF option)
PTC/NTC thermistor input for bearing/winding protection
Six Intelligent Starting Modes
The FST-3000 soft starter offers six starting modes to match any application requirement: Current limiting start for maximum current control; Voltage ramp start for smooth acceleration; Kick start for high-friction loads; Current ramp start for precise torque control; Jog/inching for positioning; and Swing start for conveyor applications.
Current limiting: 50-600% FLA adjustable
Voltage ramp: 1-120 seconds ramp time
Kick start: 0-2 seconds at 70-90% voltage
Soft stop: 1-60 seconds deceleration control
DC braking: 0-20 seconds for fast stopping
Soft Starter Applications
Centrifugal Pumps
Centrifugal pumps benefit from soft starting by eliminating water hammer and pressure surges that damage pipes and valves. The current limiting start reduces inrush to 3-4× FLA (vs 6-8× with direct-on-line), preventing voltage dips that affect other equipment.
Key benefits: Eliminates water hammer, prevents pressure surges, dry-run protection, voltage dip mitigation Typical configuration: 15kW-315kW for municipal and industrial pumps Recommended soft starter models: FST-3015 (15kW), FST-3075 (75kW), FST-3155 (160kW)
Fans & Blowers
Large fans and blowers have high inertia that causes belt squeal and mechanical stress during direct starting. The voltage ramp start of this motor soft starter provides smooth acceleration, eliminating belt slip and extending bearing life.
Key benefits: Eliminates belt squeal, reduces bearing stress, smooth acceleration, adjustable ramp time Typical configuration: 22kW-500kW for HVAC and industrial fans Recommended soft starter models: FST-3022 (22kW), FST-3110 (110kW), FST-3500 (500kW)
Air Compressors
Air compressors require high starting torque to overcome initial compression. The kick start mode of this electronic soft starter provides the initial torque boost, then transitions to smooth ramping—eliminating mechanical shock that damages couplings and gears.
Conveyors and crushers with high inertia require controlled acceleration to prevent material spillage and mechanical stress. The swing start mode is specifically designed for these soft starter applications.
Key benefits: Controlled acceleration, prevents material spillage, reduces belt wear Typical configuration: 45kW-630kW for mining and material handling Recommended soft starter models: FST-3045 (45kW), FST-3160 (160kW), FST-3630 (630kW)
Soft Starter Technical Specifications
Power Range & Model Selection
Model
Power (380V)
Rated Current
Dimensions (mm)
Weight (kg)
FST-3005
5.5kW
10A
185×348×210
8.1
FST-3007
7.5kW
15A
185×348×210
8.2
FST-3011
11kW
24A
185×348×210
8.3
FST-3015
15kW
30A
185×348×210
8.45
FST-3018
18.5kW
37A
185×348×210
8.5
FST-3022
22kW
45A
185×348×210
8.55
FST-3030
30kW
60A
185×348×210
8.6
FST-3037
37kW
75A
185×348×210
8.65
FST-3045
45kW
90A
185×348×210
8.65
FST-3055
55kW
110A
185×348×210
8.7
FST-3075
75kW
150A
185×348×210
8.8
FST-3090
90kW
180A
300×605×250
30.0
FST-3110
110kW
230A
300×605×250
30.1
FST-3132
132kW
250A
300×605×250
30.3
FST-3160
160kW
300A
300×605×250
30.4
FST-3185
185kW
360A
300×605×250
30.5
FST-3200
200kW
400A
340×661×260
42.2
FST-3225
250kW
480A
340×661×260
42.3
FST-3280
280kW
560A
340×661×260
42.5
FST-3315
315kW
640A
340×661×260
42.6
FST-3355
355kW
700A
340×661×260
42.8
FST-3400
400kW
790A
340×661×260
42.9
FST-3500
500kW
1000A
340×661×260
43.0
FST-3630
630kW
1200A
340×661×260
43.2
Electrical Specifications
Control Power: AC 380V (-10% to +15%), 50/60Hz (internal, no external connection needed)
Input Power: AC 380V (-10% to +15%), 50/60Hz
Motor Type: General squirrel cage 3-phase AC induction motor
Starting Current: 2-4× FLA (adjustable 50-600%)
Starting Torque: 0-90% of DOL torque (adjustable)
Acceleration Time: 1-120 seconds (adjustable)
Starting Frequency: Max 15 starts per hour (standard duty)
Display: Large LCD, Chinese/English, shows current, voltage, faults, parameters
Communication: Modbus RTU standard
Installation: Wall-mounted
Environment: -25℃ to +40℃, humidity <90% (no condensation), altitude <1000m
Soft Starter Customer Success Stories
"We replaced 12 external-bypass soft starters with FST-3000 units in our water treatment plant. The built-in design saved us 30% panel space and 2 hours wiring time per unit. The LCD display makes troubleshooting easy—technicians can see exactly what's happening without a manual. Starting current dropped from 7× to 3× FLA, eliminating voltage dips that were affecting our SCADA system." — Li Wei, Electrical Engineer, Guangdong Water Authority
"The FST-3000's kick start mode was perfect for our air compressors. It provides the initial torque to overcome compression, then ramps smoothly. We've eliminated the mechanical shock that was damaging couplings, and the soft stop prevents reverse rotation. After 18 months of 24/7 operation, zero failures." — Wang Tao, Maintenance Manager, Shandong Chemical Plant
Anyhertz Drive(Shenzhen) Co., Ltd.(hereinafter referred to as "Anyhz") is a leading China frequency converter manufacturer established in 2005. We specialize in high-end magnetic flux vector VFDs with independent intellectual property rights. Our company has been committed to the research and develo... Anyhertz Drive(Shenzhen) Co., Ltd.(hereinafter referred to as "Anyhz") is a leading China frequency converter manufacturer established in 2005. We specialize in high-end magnetic flux vector VFDs with independent intellectual property rights. Our company has been committed to the research and develo...
