VFD 300 N/T Series – Three Phase 380V Input / Three Phase 380V Output
The VFD 300 N/T Series is our full-range three-phase industrial frequency inverter, covering power range from 0.75kW to 720kW. Featuring advanced vector control technology, it delivers precise motor control for demanding industrial applications.
Key Features
- Output Frequency: 0-600Hz
- Overload Capacity: 150% rated current for 1 minute, 180% for 3 seconds
- Control Method: Optimized space voltage vector SVPWM control
- Control Mode: Sensorless vector control with optimal low-frequency dead zone compensation
- Frequency Resolution: Digital 0.01Hz; Analog max frequency ×0.025%
- Starting Frequency: 0.0-10.0Hz
- Torque Boost: Automatic / Manual 0.1%-30.0%
- Built-in PID closed-loop control
- Multi-speed operation via built-in PLC or control terminals
- RS485 communication support
- PV Power Tracking: CVT mode, MPPT mode
- Comprehensive protection: overcurrent, overvoltage, undervoltage, overheat, overload
Model Specifications (300N – Plastic Shell / 300T – Iron Shell)
| Model | Rated Current | Dimensions (H×W×D mm) | IGBT |
|---|---|---|---|
| 300N-0.75KWG-3 | 2.5A | 165×98×128 | Single Tube |
| 300N-1.5KWG-3 | 3.7A | 165×98×128 | Single Tube |
| 300N-2.2KWG-3 | 5A | 165×98×128 | Single Tube |
| 300N-3KWG-3 | 6.8A | 165×98×128 | Single Tube |
| 300N-4KWG-3 | 9A | 165×98×128 | Single Tube |
| 300N-5.5KWG-3 | 13A | 187×100×137.5 | Single Tube |
| 300N-7.5KWG-3 | 17A | 187×100×137.5 | Single Tube |
| 300N-11KWG-3 | 25A | 220×130×177.5 | Single Tube |
| 300N-15KWG-3 | 32A | 220×130×177.5 | Single Tube |
| 300T-11KWG-3 | 25A | 280×150×196 | Module |
| 300T-15KWG-3 | 32A | 280×150×196 | Module |
| 300T-18.5KWG-3 | 37A | 330×170×235 | Module |
| 300N-22KWG-3 | 45A | 380×215×215 | Module |
| 300T-30KWG-3 | 60A | 380×215×215 | Module |
| 300T-37KWG-3 | 75A | 380×215×215 | Module |
| 300-45KWG-3 | 90A | 510×260×260 | Module |
| 300-55KWG-3 | 110A | 535×260×272 | Module |
| 300T-75KWG-3 | 150A | 535×260×272 | Module |
| 300T-90KWG-3 | 176A | 600×340×280 | Module |
| 300-110KWG-3 | 210A | 600×340×280 | Module |
| 300-132KWG-3 | 250A | 800×380×310 | Module |
| 300-160KWG-3 | 300A | 800×380×310 | Module |
| 300-185KWG-3 | 340A | 800×380×310 | Module |
| 300-200KWG-3 | 380A | 920×500×315 | Module |
| 300-220KWG-3 | 415A | 920×500×315 | Module |
| 300-230KWG-3 | 470A | 1050×650×360 | Module |
| 300-285KWG-3 | 520A | 1050×650×360 | Module |
| 300-315KWG-3 | 600A | 1050×650×360 | Module |
| 300-355KWG-3 | 640A | 1250×850×350 | Module |
| 300-400KWG-3 | 690A | 1250×850×350 | Module |
| 300-450KWG-3 | 820A | 1250×850×350 | Module |
| 300-500KWG-3 | 860A | 1350×1000×390 | Module |
| 300-550KWG-3 | 920A | 1350×1000×390 | Module |
| 300-630KWG-3 | 1100A | 1350×1000×390 | Module |
| 300-720KWG-3 | 1220A | 1350×1000×390 | Module |
Electrical Specifications
| Parameter | Specification |
|---|---|
| Input Voltage | Three Phase 380V 50/60Hz |
| Output Voltage | Three Phase 0-380V |
| Output Frequency | 0-600Hz |
| Operating Voltage | Three-phase 380V Input / Three-phase 380V Output |
300N: Plastic shell models (0.75kW-22kW), compact design
300T: Iron shell models (11kW-37kW), enhanced durability
300: Cabinet-type models (45kW-720kW), industrial grade
Why Choose VFD300 N/T Series?
Variable speed control eliminates energy waste from constant-speed motors. ROI typically achieved within 12-18 months.
MPPT/CVT dual-mode solar tracking drives pumps directly from panels — no batteries, no grid connection needed.
Soft start/stop eliminates mechanical stress on pumps, conveyors, and fans. Extended equipment lifespan.
IP20/IP54 options, -10°C to 50°C operation, coated PCBs. Deploy in mines, farms, and factories worldwide.
Quick Selection Guide — N/T Series
| Your Application | Recommended Model | Key Tip |
|---|---|---|
| Solar Water Pump | PV Type | Oversize PV array by 20-30%; use MPPT mode |
| Water Pump / HVAC | P Type | Variable torque; PID built-in for pressure control |
| Conveyor / Mixer / Crusher | G Type | Constant torque; size up 1 level for heavy loads |
| CNC Spindle | G Type | High frequency resolution 0.01Hz; braking unit recommended |
| High Altitude (>1000m) | Derate 1%/100m | Above 4000m, contact our engineers for customization |
Quick Specs at a Glance
| Input Voltage | 3PH AC 380V (-15%) ~ 440V (+10%) |
| Output Voltage | 3PH AC 0 ~ 440V |
| Power Range | 0.75kW – 800kW |
| Output Frequency | 0 – 600Hz |
| Control Mode | Sensorless Vector / V/F |
| Overload Capacity | G: 150%/60s, P: 120%/60s |
| Protection | OC, OV, UV, OH, OL, Phase Loss, Ground Fault |
| Special Feature | MPPT/CVT Solar Tracking (PV Type) |
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Output Frequency | 0-600Hz |
| Carrier Frequency | 1.0-15.0kHz, automatically adjusts based on temperature and load |
| Control Method | Optimized space voltage vector SVPWM control |
| Control Mode | Sensorless vector control with optimal low-frequency dead zone compensation |
| V/F Control | Linear, multi-point, square root (selectable) |
| Frequency Resolution | Digital setting: 0.01Hz; Analog setting: max frequency × 0.025% |
| Starting Frequency | 0.0-10.0Hz |
| Starting Torque | 0.5Hz / 180% (Sensorless Vector Control); 1Hz / 180% (V/F) |
| Torque Boost | Automatic torque boost; Manual torque boost 0.1%-30.0% |
| Speed Control Accuracy | ±0.5% of maximum speed (Sensorless Vector Control) |
| Speed Adjustment Range | 1:100 (Sensorless Vector Control) |
| Overload Capacity (G-type) | 150% rated current for 1 minute, 180% rated current for 3 seconds |
| Overload Capacity (P-type) | 120% rated current for 60 seconds, 150% rated current for 10 seconds |
| Acceleration/Deceleration | Linear or S-curve, 4 sets of accel/decel time (0.1-3600s) |
| DC Braking | DC braking at start and stop |
| Jog Operation | Jog frequency: 0.0Hz to max frequency; Jog accel/decel time: 0.1-3600s |
| Built-in PID | Closed-loop control for pressure, flow, temperature regulation |
| Multi-speed Operation | Up to 16-speed via built-in PLC or control terminals |
| Run Command Channel | Control panel, control terminals, RS485 communication |
| Frequency Setting | Digital keypad, analog input (AI1/AI2), RS485, multi-speed, simple PLC, PID |
| Digital Input | 5 programmable digital inputs (DI1-DI5), DI5 supports 20kHz high-speed pulse input |
| Analog Input | 2 channels (AI1, AI2): 0-20mA / 0-10V selectable |
| Analog Output | 2 channels (AO1, AO2): 0-20mA or 0-10V selectable |
| Relay Output | 2 relays: NO/NC, rated AC250V 3A / DC30V 1A |
| Communication | RS485 Modbus RTU (standard) |
| Protection | Overcurrent, overvoltage, undervoltage, overheat, overload, input/output phase loss, motor overheat (PTC), ground fault |
| PV Power Tracking | CVT mode, MPPT mode |
| Display | LED display showing set frequency, output frequency, output voltage, output current, etc. |
| Operating Temperature | -10°C to +50°C (derating above 40°C) |
| Storage Temperature | -20°C to +60°C |
| Humidity | ≤95% RH, non-condensing |
| Altitude | ≤1000m (derate 1% per 100m above 1000m) |
| Protection Degree | IP20 (standard); IP54 available on request |
| Installation | Wall mount or flange mount |
| Cooling | Forced air cooling |
| Quality Assurance | 100% full-load aging test before shipment |
Model Naming Convention
SHZK VFD300 models follow a standardized naming system for easy identification:
XXX – 055 G B – T4 – L
| Position | Code | Description |
|---|---|---|
| Series | 300 | VFD300 Series |
| Power Rating | 007 | 0.75 kW |
| 015 | 1.5 kW | |
| 055 | 5.5 kW | |
| 720 | 72 kW | |
| 800 | 80 kW | |
| Motor Type | G | General purpose (standard industrial) |
| P | Fan & Pump type (light-duty, 120% overload) | |
| PV | Solar/PV dedicated (MPPT/CVT solar tracking) | |
| Braking Unit | B | With built-in braking unit |
| (blank) | Without braking unit | |
| Voltage Class | T4 | 3PH AC 380-480V Input / 3PH 0-480V Output |
| T2 | 3PH AC 200-240V Input / 3PH 0-240V Output | |
| S2 | 1PH AC 200-240V Input / 3PH 0-240V Output | |
| S3 | 1PH AC 200-240V Input / 3PH 0-400V Output | |
| H2 | 1PH AC 200-240V Input / 1PH 0-240V Output | |
| Reactor Option | (blank) | No reactor |
| -L | With AC output reactor | |
| -T | With DC reactor |
Available Configurations
| Configuration | Model Suffix | Best For |
|---|---|---|
| General Industrial | G | Conveyors, CNC, mixers, general machinery |
| Fan & Pump (Energy Saving) | P | Centrifugal pumps, HVAC fans, blowers (lower overload, optimized for variable torque loads) |
| Solar/PV Dedicated | PV | Solar water pumping, agricultural irrigation, off-grid water supply (MPPT + CVT dual-mode solar tracking) |
Optional Accessories
- Braking Unit (B): Built-in braking resistor for applications requiring fast deceleration (cranes, hoists, elevators)
- AC Output Reactor (-L): Recommended for long motor cable runs (>50m) or multiple motors on one VFD
- DC Reactor (-T): Improves power factor and reduces harmonic distortion for large installations
- Communication Cards: Profibus-DP and Profinet modules available on request for SCADA integration
Applications
Heavy industry, mining equipment, large conveyors, HVAC systems, water treatment, oil & gas, manufacturing lines, and PV solar pump systems.
OEM & ODM available. Contact us for pricing and technical support.
Control Circuit Wiring Diagrams
The following diagrams show the control circuit terminal layout and wiring for each main board type used in the 300 Series. The board type varies by model and power rating.
Main Circuit Terminal Layout
Main Circuit Terminal Layout (R/L1, S/L2, T — PP, PB — U, V, W — G, E)
A-Type (0.75-11kW) Main Board Wiring Diagram
B-Type (Mid Power) Main Board Wiring Diagram
C-Type (Mid Power) Main Board Wiring Diagram
D-Type (High Power) Main Board Wiring Diagram
E-Type (Max Power) Main Board Wiring Diagram
Wiring Notes
- Analog voltage signals require shielded cables; wiring distance should not exceed 20m.
- In severe interference environments, equip analog signal source side with filter capacitor or ferrite core.
- Terminal assignments may vary by model — refer to actual product labeling.
FAQ About VFD 300 N/T Series
What is the difference between VFD, AC drive, and frequency inverter?
VFD (Variable Frequency Drive), AC drive, and frequency inverter are different names for the same device. They all control the speed of an AC motor by varying the frequency and voltage of the power supplied. “VFD” is most common in North America, “AC drive” is widely used globally, and “frequency inverter” is common in Europe and Southeast Asia.
What applications is the N/T series suitable for?
The N/T series three-phase VFD is ideal for pumps, fans, HVAC systems, air compressors, conveyors, mixers, crushers, and other industrial equipment requiring precise speed control and energy savings.
How to choose the right VFD for my motor?
Match the VFD rated power to your motor power rating. For pump and fan applications, you can often use a VFD one size smaller. For constant torque loads like conveyors, match exactly. Consider input voltage, output current, and application requirements. Contact our technical team for sizing assistance.