Key facts
- Power range: 0.75 kW to 800 kW
- Input: three-phase 380-480V; output: three-phase 380-480V
- Series name: SHZK 300N T4 (main industrial three-phase 380V AC drive)
- Control: sensorless vector control (SVC) and V/F control, built-in PID and multi-speed / simple PLC
- Communication: Modbus RTU over RS485; enclosure IP20 standard, IP54 optional
- Certifications: CE (EU LVD 2014/35/EU and EMC 2014/30/EU), ISO 9001:2015, RoHS
- OEM/ODM supported (logo, packaging, voltage, firmware); sample orders accepted
- Factory: Yueqing, Zhejiang, China; contact mail@shzkvfd.com or WhatsApp +86 13757750205
300N T4 Series – Three Phase 380V Input / Three Phase 380V Output
The 300N T4 Series is our full-range three-phase industrial frequency inverter, covering power range from 0.75kW to 800kW. Featuring advanced vector control technology, it delivers precise motor control for demanding industrial applications.
Key Features
- Output Frequency: 0-500Hz
- 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
| Model | Rated Current | Dimensions (H×W×D mm) | Shell / Braking |
|---|---|---|---|
| 300N-0.75G-T4 | 2.5A | 165×98×128 | Plastic |
| 300N-0.75GB-T4 | 2.5A | 165×98×128 | Plastic (with braking) |
| 300N-1.5G-T4 | 3.7A | 166×91×126 | Plastic |
| 300N-1.5GB-T4 | 3.7A | 166×91×126 | Plastic (with braking) |
| 300N-2.2G-T4 | 5A | 166×91×126 | Plastic |
| 300N-2.2GB-T4 | 5A | 166×91×126 | Plastic (with braking) |
| 300N-3G-T4 | 6.8A | 185×99×131 | Plastic |
| 300N-3GB-T4 | 6.8A | 185×99×131 | Plastic (with braking) |
| 300N-4G-T4 | 9A | 185×99×131 | Plastic |
| 300N-4GB-T4 | 9A | 185×99×131 | Plastic (with braking) |
| 300N-5.5G-T4 | 13A | 187×100×137.5 | Plastic |
| 300N-5.5GB-T4 | 13A | 187×100×137.5 | Plastic (with braking) |
| 300N-7.5G-T4 | 17A | 220×127×172 | Plastic |
| 300N-7.5GB-T4 | 17A | 220×127×172 | Plastic (with braking) |
| 300N-11G-T4 | 25A | 220×127×172 | Plastic |
| 300N-11GB-T4 | 25A | 220×127×172 | Plastic (with braking) |
| 300N-15G-T4 | 32A | 280×150×196 | Plastic |
| 300N-15GB-T4 | 32A | 280×150×196 | Plastic (with braking) |
| 300N-18.5G-T4 | 37A | 280×150×196 | Iron |
| 300N-18.5GB-T4 | 37A | 280×150×196 | Iron (with braking) |
| 300N-22G-T4 | 45A | 330×170×235 | Iron |
| 300N-22GB-T4 | 45A | 330×170×235 | Iron (with braking) |
| 300N-30G-T4 | 60A | 380×215×215 | Iron |
| 300N-30GB-T4 | 60A | 380×215×215 | Iron (with braking) |
| 300N-37G-T4 | 75A | 380×215×215 | Iron |
| 300N-37GB-T4 | 75A | 380×215×215 | Iron (with braking) |
| 300N-45G-T4 | 90A | 510×260×260 | Iron |
| 300N-45GB-T4 | 90A | 510×260×260 | Iron (with braking) |
| 300N-55G-T4 | 110A | 510×260×260 | Iron |
| 300N-55GB-T4 | 110A | 510×260×260 | Iron (with braking) |
| 300N-75G-T4 | 150A | 535×260×272 | Iron |
| 300N-75GB-T4 | 150A | 535×260×272 | Iron (with braking) |
| 300N-90G-T4 | 176A | 535×260×272 | Iron |
| 300N-90GB-T4 | 176A | 535×260×272 | Iron (with braking) |
| 300N-110G-T4 | 210A | 600×340×280 | Iron |
| 300N-110GB-T4 | 210A | 600×340×280 | Iron (with braking) |
| 300N-132G-T4 | 250A | 800×380×310 | Iron |
| 300N-132GB-T4 | 250A | 800×380×310 | Iron (with braking) |
| 300N-160G-T4 | 300A | 800×380×310 | Iron |
| 300N-160GB-T4 | 300A | 800×380×310 | Iron (with braking) |
| 300N-185G-T4 | 340A | 800×380×310 | Iron Cabinet |
| 300N-185GB-T4 | 340A | 800×380×310 | Iron Cabinet (with braking) |
| 300N-200G-T4 | 380A | 800×380×310 | Iron Cabinet |
| 300N-200GB-T4 | 380A | 800×380×310 | Iron Cabinet (with braking) |
| 300N-220G-T4 | 415A | 920×500×315 | Iron Cabinet |
| 300N-220GB-T4 | 415A | 920×500×315 | Iron Cabinet (with braking) |
| 300N-250G-T4 | 470A | 920×500×315 | Iron Cabinet |
| 300N-250GB-T4 | 470A | 920×500×315 | Iron Cabinet (with braking) |
| 300N-285G-T4 | 520A | 920×500×315 | Iron Cabinet |
| 300N-285GB-T4 | 520A | 920×500×315 | Iron Cabinet (with braking) |
| 300N-315G-T4 | 600A | 1050×650×360 | Iron Cabinet |
| 300N-315GB-T4 | 600A | 1050×650×360 | Iron Cabinet (with braking) |
| 300N-355G-T4 | 640A | 1050×650×360 | Iron Cabinet |
| 300N-355GB-T4 | 640A | 1050×650×360 | Iron Cabinet (with braking) |
| 300N-400G-T4 | 690A | 1250×850×350 | Iron Cabinet |
| 300N-400GB-T4 | 690A | 1250×850×350 | Iron Cabinet (with braking) |
| 300N-450G-T4 | 820A | 1250×850×350 | Iron Cabinet |
| 300N-450GB-T4 | 820A | 1250×850×350 | Iron Cabinet (with braking) |
| 300N-500G-T4 | 860A | 1250×850×350 | Iron Cabinet |
| 300N-500GB-T4 | 860A | 1250×850×350 | Iron Cabinet (with braking) |
| 300N-550G-T4 | 920A | 1350×1000×390 | Iron Cabinet |
| 300N-550GB-T4 | 920A | 1350×1000×390 | Iron Cabinet (with braking) |
| 300N-630G-T4 | 1100A | 1350×1000×390 | Iron Cabinet |
| 300N-630GB-T4 | 1100A | 1350×1000×390 | Iron Cabinet (with braking) |
| 300N-720G-T4 | 1220A | 1350×1000×390 | Iron Cabinet |
| 300N-720GB-T4 | 1220A | 1350×1000×390 | Iron Cabinet (with braking) |
| 300N-800G-T4 | 1350A | 1350×1000×390 | Iron Cabinet |
| 300N-800GB-T4 | 1350A | 1350×1000×390 | Iron Cabinet (with braking) |
Notes: G = General purpose (150% overload, standard unit). GB = General purpose with built-in braking unit. P = Fan and pump type (120% overload). Choose G or GB per your braking requirements. Dimensions H×W×D in mm.
Notes: Model with B suffix includes a built-in braking unit; model without B is standard. G = General purpose (150% overload), P = Fan and pump type (120% overload). Dimensions H×W×D in mm.
Notes: G = General purpose (150% overload), P = Fan and pump type (120% overload), B suffix = built-in braking unit. Dimensions H×W×D in mm.
Enclosure Options — S / Y / D / Z
This series offers four enclosure styles — S, Y, D and Z. For ratings up to 11 kW, all four are made of durable plastic housing, and the drive electronics inside are identical — only the housing shape, form factor and dimensions differ, so you can pick the enclosure that best fits your installation.
Compact Enclosure
Compact, lightweight plastic housing for small power ratings — ideal for tight panel spaces.
Black Enclosure
Black plastic moulded housing — a clean, discreet look with identical performance.
Rugged Plastic Enclosure
Robust, rugged plastic enclosure with a sturdy industrial appearance.
Standard Enclosure
Standard plastic housing for ratings up to 11 kW with consistent performance.
Enclosure selection manuals (dimensions, panel cut-outs & terminals):
Electrical Specifications
| Parameter | Specification |
|---|---|
| Input Voltage | Three Phase 380-480V 50/60Hz |
| Output Voltage | Three Phase 0-480V |
| Output Frequency | 0-500Hz |
| Operating Voltage | Three-phase 380-480V Input / Three-phase 0-480V Output |
Plastic Shell: Compact design for 0.75kW-11kW models
Iron Shell: Enhanced durability for 15kW-800kW models
Why Choose 300N T4 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 — T4 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 | 0-500Hz |
| 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 300N models follow a standardized naming system for easy identification:
300N-055GB-T4
| Position | Code | Description |
|---|---|---|
| Series | 300N | 300N Series |
| Motor adapter power | 0.75 / 1.5 / 2.2 / 5.5 / 7.5 / 18.5 | Decimal ratings are written as-is, in kW |
| 003 / 011 / 055 / 800 | Whole-number ratings use three digits: 003 = 3 kW, 011 = 11 kW, 055 = 55 kW, 800 = 800 kW | |
| Full range | 0.75 kW – 800 kW across the 300N platform | |
| Motor type | G | Heavy load (constant torque) — standard industrial drives |
| P | Fan / pump type (light duty) — used on S3 models | |
| PV | Photovoltaic DC input with CVT / MPPT tracking — PV-T2 / PV-T4 | |
| 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 |
Common 300N variants
| Variant | Meaning | Used in |
|---|---|---|
| G | Heavy load (constant torque), without built-in braking unit | H2; T2 from 15 kW; T4 from 30 kW |
| GB | Heavy load (constant torque) with built-in braking unit | S2; T2 up to 11 kW; T4 up to 22 kW |
| PB | Fan / pump type (light duty) with built-in braking unit | S3, all ratings |
| PV | Photovoltaic DC input with CVT / MPPT tracking | PV-T2 / PV-T4, all ratings |
Match the Z-Series Selection Manual Part Number
The SHZK 300N Z-series selection manual (2026.07) uses a simplified part-number format that maps directly onto the model codes below. If you are reading a part number such as 300N-5.5KWG-3 or 300T-37KWG-3, here is what each field means and how it converts to the specification table in this guide.
| Part-number field | Example value | Meaning |
|---|---|---|
| 300N | 300N | Series prefix. Every SHZK 300N drive carries the same 300N prefix. |
| Power (kW) | 5.5 | Rated motor power in kilowatts (0.75–720 kW in the manual). |
| KW | KW | Constant-torque “general purpose” duty (G rating, 150%/60 s). |
| G | G | Motor type G (same as this guide; P = fan & pump). |
| -3 / -S2 / -S3 / -H2 | -3 | Voltage & phasing class: -3 = 3PH 380V (T4), -S2 = 1PH 220→3PH 220V, -S3 = 1PH 220→3PH 380V, -H2 = 1PH 220→1PH 220V. |
Example: 300N-5.5KWG-3 = a plastic-housing 5.5 kW general-purpose drive, three-phase 380 V input/output — exactly the T4 configuration in the specification table above. See the control terminal layout (A–E) guide to identify the board on your unit.
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.
Inside the 300N T4: Structure, Quality & Certification
Built in our own SHZK production line, the 300N T4 combines a precision power stage with factory-tested reliability. Every unit is 100% full-load aged and QA-inspected before shipping.
✅ CE Certified — compliant with EU Low Voltage Directive 2014/35/EU and EMC Directive 2014/30/EU. Certificate no. M.2026.206.C145141 (UDEM, valid 2026–2031). Download CE certificate →
Precision power stage — IGBT modules and a layered control PCB.
Efficient cooling — finned heat sink and power module design for sustained torque.
Vector control board — precise speed & torque regulation logic.
Scalable footprint — compare unit sizes from 1.5 kW to 11 kW and beyond.
Factory & Quality Assurance
SMT surface-mount production and 100% full-load aging before delivery — backed by CE, RoHS & ISO 9001 manufacturing.
OEM / ODM Ready
Custom branding, packaging and parameter presets from a MOQ of 50 units — for system integrators and panel builders.
Download T4 Technical Documentation (PDF)
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 300N T4 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 T4 Series suitable for?
The 300N T4 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.
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