FST-585 Series Vector VFD 0.4kW-11kW | High Performance SVC AC Drive for Pump, Fan & General Automation
FST-585 Series Vector VFD
,SVC AC Drive for Pump
,Universal VFD with warranty
The AnyHz FST-585 series is a high-performance vector variable frequency drive engineered for industrial motor control from 0.4kW to 11kW. Supporting both open-loop sensorless vector control (SVC) and V/F control, this universal frequency inverter delivers 180% starting torque at 0.5Hz and a 1:100 speed range, making it ideal for pumps, fans, conveyors, compressors, mixers, and general automation machinery.
Available in single-phase 220V (2S) and three-phase 380V (4T) configurations, the FST-585 vector VFD features a built-in PID controller, 16-segment multi-speed operation, standard RS485 Modbus RTU communication, and optional built-in braking unit (B suffix). Whether you need a pump VFD for constant pressure water supply or a fan frequency drive for HVAC energy savings, the FST-585 provides reliable, cost-effective performance with comprehensive protection.
Why Choose FST-585 Series Vector VFD?
- Dual Control Modes: Switch between open-loop SVC (high torque precision) and V/F control (general purpose) to match your load.
- High Starting Torque: 180% rated torque at 0.5Hz (SVC) ensures smooth startup of heavy loads without stall.
- Wide Speed Range: 1:100 speed regulation with ±0.5% steady-state accuracy for precise process control.
- Built-in PID Controller: Standard closed-loop control for pressure/flow/temperature—no external controller needed for pump and fan systems.
- 16-Segment Multi-Speed: Built-in simple PLC or terminal control supports up to 16-step speed operation.
- G-Type & P-Type Selection: G-type for constant torque general loads (150% overload 60s); P-type for pump/fan variable torque loads (120% overload 60s).
- Optional Built-in Braking: Models with "B" suffix include integrated braking unit for fast deceleration and lifting applications.
- RS485 Modbus Communication: Standard serial port for remote monitoring, parameter setting, and SCADA integration.
- Automatic Voltage Regulation (AVR): Maintains stable output voltage when grid input fluctuates.
- Transient Power Loss Ride-Through: "Non-stop at instant stop" utilizes load inertia to maintain operation during brief power dips.
- Comprehensive Protection: Overcurrent, overvoltage, undervoltage, overload, input/output phase loss, module overheat, motor short-circuit, and external fault detection.
FST-585 Series Technical Specifications
Electrical Data
| Input Voltage | Model | Power (kW) | Input Current (A) | Output Current (A) | Motor (kW) |
|---|---|---|---|---|---|
| 1-Phase 220V ±10% | FST-585-2S0.4GB | 0.4 | 5.4 | 2.1 | 0.4 |
| FST-585-2S0.75GB | 0.75 | 8.2 | 3.8 | 0.75 | |
| FST-585-2S1.5GB | 1.5 | 14 | 7.0 | 1.5 | |
| FST-585-2S2.2GB | 2.2 | 23 | 9.0 | 2.2 | |
| 3-Phase 380V ±15% | FST-585-4T0.75GB | 0.75 | 3.4 | 2.1 | 0.75 |
| FST-585-4T1.5GB | 1.5 | 5.0 | 3.8 | 1.5 | |
| FST-585-4T2.2G/3.7PB | 2.2 / 3.7 | 5.8 | 5.1 / 9.0 | 2.2 / 3.7 | |
| FST-585-4T3.7G/5.5PB | 3.7 / 5.5 | 10.5 | 9.0 / 13 | 3.7 / 5.5 | |
| FST-585-4T5.5G/7.5PB | 5.5 / 7.5 | 14.6 | 13 / 17 | 5.5 / 7.5 | |
| FST-585-4T7.5G/11PB | 7.5 / 11 | 20.5 | 17 / 25 | 7.5 / 11 |
General Specifications
| Item | Specification |
|---|---|
| Control Method | Open-loop Vector Control (SVC) / V/F Control |
| Speed Range | 1:100 (SVC) |
| Starting Torque | 180% at 0.5Hz (SVC) |
| Speed Accuracy | ±0.5% (SVC) |
| Torque Accuracy | ±5% (SVC) |
| Overload Capacity | G-Type: 150% 60s / 180% 3s; P-Type: 120% 60s / 150% 3s |
| Output Frequency | SVC: 0-320Hz; V/F: 0-3200Hz |
| Carrier Frequency | 0.75kHz - 15kHz (auto-adjust by load and temperature) |
| Frequency Resolution | Digital: 0.01Hz; Analog: 0.025% of max frequency |
| V/F Curve | Linear, Multi-point, Custom V/F curve |
| Torque Boost | Auto torque boost; Manual 0.1% - 30.0% |
| Accel/Decel Time | 0.0 - 3200.0s (4 groups, linear or S-curve) |
| Analog Input | AI1: 0-10V / 4-20mA (selectable via P4-37); Impedance: 22kΩ (V) / 500Ω (A) |
| Digital Input | 4 channels (X1-X4, X4 supports HDI pulse up to 50kHz); Level: 5V-30V |
| Relay Output | KA-KC (NO): AC250V 3A / DC30V 1A |
| Analog Output | AO1: 0-10V / 0-20mA |
| Communication | RS485, Modbus RTU protocol |
| Protection | Overcurrent, overvoltage, undervoltage, overload, input/output phase loss, module overheat, motor short-circuit, external fault |
| Ambient Temperature | -10℃ ~ +40℃ (derate above 40℃ up to 50℃) |
| Humidity | <95% RH, no condensation |
| Altitude | ≤1000m (derate 10% per additional 1000m) |
| Vibration | <5.9m/s² (0.6g) |
| Cooling | Forced air cooling |
| Protection Rating | IP20 |
FST-585 Series Dimensions & Mounting
0.75kW - 2.2kW Models
- Front Panel: 72mm × 146mm
- Mounting Depth: 114mm (109mm body)
- Compact book-style design for tight electrical panels
3.7kW - 5.5kW Models
- Front Panel: 87mm × 185mm
- Mounting Depth: 135mm (130mm body)
- Enhanced heatsink with forced air cooling
Removable Keypad Bracket
- Bracket Size: 64mm × 44mm
- Optional extension cable for door mounting
- Easy parameter adjustment outside the enclosure
FST-585 Series Product Details
Intelligent LED Keypad Panel
5-digit LED display with RUN, L/R, F/R status indicators. Features potentiometer, PRG/ENT/MFK keys, and removable design with optional external bracket.
Power & Control Terminals
Clear color-coded RST (input) and UVW (output) power terminals. Control side includes +10V, +24V, AI1, X1-X4, RS485 (A+/B-), and relay KA-KC.
Coated PCBA Protection
Industrial-grade coated printed circuit board provides extra moisture and dust resistance for harsh environments.
Efficient Heat Dissipation
High-performance cooling fan on 3.7kW+ models. Optimized air channel design keeps IGBT and rectifier modules within safe temperatures.
High Performance IGBT
Quality IGBT power modules deliver stable PWM output with low harmonic distortion, reducing motor heating and noise.
Standard Wiring Diagram
Supports 3-phase 380V input, motor U/V/W output, DC braking resistor (PB terminal on B models), and full signal isolation.
FST-585 Series Applications
Water Pump & Constant Pressure Supply
Built-in PID and sleep/wake function make the FST-585 an excellent pump VFD for booster stations and irrigation. Save 20-30% energy while eliminating water hammer.
Recommended: FST-585-4T1.5GB, FST-585-4T2.2G/3.7PB, FST-585-4T3.7G/5.5PB
HVAC & Fan Control
Auto-adjustable carrier frequency (0.75-15kHz) ensures quiet operation in air handling units and cooling towers. P-type models are optimized for quadratic torque loads.
Recommended: FST-585-4T0.75GB, FST-585-4T1.5GB, FST-585-4T2.2G/3.7PB
Conveyor & Material Handling
Precise SVC speed control and optional braking unit (B models) ensure smooth start/stop for conveyor belts and lifting equipment.
Recommended: FST-585-4T0.75GB, FST-585-4T1.5GB, FST-585-4T7.5G/11PB
General Industrial Machinery
Reliable performance for mixers, grinders, textile machines, packaging equipment, and machine tools requiring stable torque across the full speed range.
Recommended: FST-585-2S0.4GB to FST-585-4T7.5G/11PB (full range)
FST-585 Series vs Standard V/F Inverter
| Feature | AnyHz FST-585 Vector VFD | Standard V/F Inverter | Impact |
|---|---|---|---|
| Control Mode | SVC + V/F dual mode | V/F only | ✓ Better low-speed torque and precision |
| Starting Torque | 180% at 0.5Hz | ~100% at 5Hz | ✓ Heavy-load startup without stall |
| Built-in PID | Standard | Optional / Extra cost | ✓ Save $50-100 on external controller |
| Multi-Speed | 16 segments (PLC or terminal) | 4-8 segments | ✓ More flexible process control |
| Communication | RS485 + Modbus RTU | Basic or none | ✓ Ready for SCADA and remote monitoring |
| Braking Unit | Built-in on "B" models | External only | ✓ Reduced wiring and panel space |
| Transient Power Loss | Non-stop ride-through | Immediate trip | ✓ Avoid unnecessary downtime |
Frequently Asked Questions
What is the difference between G-type and P-type in FST-585 series?
G-type (General Load): Designed for constant torque applications such as conveyors, mixers, and machine tools with 150% overload capacity for 60 seconds. P-type (Pump/Fan Load): Optimized for variable torque applications like water pumps and HVAC fans with 120% overload capacity for 60 seconds. P-type models typically allow one frame size to drive a larger motor (e.g., 7.5G/11PB means G-type for 7.5kW or P-type for 11kW).
Does FST-585 support single-phase 220V input?
Yes. The FST-585-2S series supports single-phase 220V ±10% input and is available in 0.4kW, 0.75kW, 1.5kW, and 2.2kW. These are ideal for residential water pumps, small workshops, and regions with single-phase power supply.
Can I use FST-585 for constant pressure water supply?
Absolutely. The FST-585 features a built-in PID controller and sleep/wake function. Simply connect a 0-10V or 4-20mA pressure sensor to AI1, set the target pressure via parameters, and the drive will automatically adjust pump speed to maintain constant pressure.
What does the "B" suffix mean in the model number?
The "B" suffix indicates the model includes a built-in braking unit. This is essential for applications requiring fast deceleration, such as lifting equipment, centrifuges, and high-inertia loads. Without the B suffix, you would need to install an external braking unit and resistor.
Is motor parameter auto-tuning required?
For V/F control mode, no tuning is required—just set basic motor parameters. For SVC (sensorless vector) mode, we recommend performing static or dynamic auto-tuning (P1-37 parameter) to achieve the best torque response and speed accuracy. The procedure takes only a few minutes via the keypad.
Need a Quote for FST-585 Series Vector VFD?
Contact AnyHz today for competitive pricing, technical support, and OEM/ODM services. We offer fast delivery from stock and 18-month warranty on all FST-585 series drives.
Get FST-585 Series Quote →The AnyHz FST-585 series is a high-performance vector variable frequency drive engineered for industrial motor control from 0.4kW to 11kW. Supporting both open-loop sensorless vector control (SVC) and V/F control, this universal frequency inverter delivers 180% starting torque at
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