Industrial VFD, AC Drive & Frequency Inverter Products
SHZK professional variable frequency drives for every industrial application — pumps, fans, HVAC, compressors, conveyors and more.
Key facts
- Full VFD power range: 0.75 kW to 800 kW
- Seven drive lines: 300N H2, S2, S3, T2, T4, PV-T2 and PV-T4, plus the ZKRZ-N soft starter series
- Input options: single-phase 220V, three-phase 220V and three-phase 380-480V; solar PV DC input for PV models
- Dedicated drives for water pumps, HVAC, conveyors, solar pumping, crane and hoist, air compressors and CNC spindles
- Power-rating index pages cover 0.75 kW to 800 kW (34 ratings)
- 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
SHZK VFD Series
Five drive families covering single-phase and three-phase, 0.75 kW to 800 kW — matched to your input supply and motor.
300N T4 Series
Full-range industrial inverter for pumps, fans, HVAC and conveyors. Heavy-duty (G) and built-in braking (GB) variants across 34 ratings.
300N T2 Series
Three-phase 220V input and output AC drive for low-voltage industrial motor systems, 16 ratings from 0.75 kW to 75 kW.
300N S2 Series
Runs a 3-phase 220V motor from a single-phase supply. Ideal for small workshops and light machines. Higher ratings available on request.
300N S3 Series
Drive 380V three-phase motors from a single-phase 220V supply without a grid upgrade, 10 ratings up to 18.5 kW.
300N H2 Series
Compact single-phase input and single-phase output speed controller for small motors. Higher ratings available on request.
Solar / PV Series
MPPT / CVT solar DC-input drives for grid-free pumping and irrigation
300N PV-T4 Series
MPPT / CVT solar DC-input drive, 34 ratings from 0.75 kW to 800 kW, for grid-free pumping and irrigation.
300N PV-T2 Series
MPPT / CVT solar DC-input drive with 3-phase 220V output, 16 ratings from 0.75 kW to 75 kW.
Soft Starter
Online intelligent motor soft starters and cabinets
ZKRZ-N Series Soft Starter
Online intelligent soft starter and cabinet for smooth motor start-up and protection of pumps, fans, conveyors and crushers.
Dedicated VFD by Application
Industry-specific VFD solutions optimized for your equipment
Crane & Hoist VFD
Heavy-duty drives for overhead cranes, gantry cranes, and material hoists. 150% overload, anti-load drop protection.
Air Compressor VFD
Purpose-built for rotary screw compressors. PID pressure control, auto sleep, 20-45% energy savings.
CNC & Machine Tool VFD
High-precision spindle drives for CNC lathes, milling machines, and grinders. Vector control, compact design.
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Why Choose SHZK as Your VFD Supplier?
- VFD Manufacturer in China — Factory-direct pricing, no middlemen
- Full Range — 0.75kW to 800kW, single-phase and three-phase
- CE Certified (LVD + EMC) — UDEM certificate no. M.2026.206.C145141; ISO 9001 quality management system
- Global Supply — Serving customers in Southeast Asia, Middle East, South America and worldwide
- Technical Support — Professional engineering team for选型 and after-sales service
Looking for a Reliable VFD / AC Drive Supplier?
Contact us today for competitive pricing and professional technical support.
Technical Manual & Selection Guide
Free engineering documentation for the SHZK 300N series — wiring, terminals, parameters and the full model selection table.
300N User Manual
Complete installation, wiring and parameter reference for the 300N series.
300N Z-Series Selection Manual
Dimensional drawings and selection data for the Z-series board types.
What Our Customers Say
“We replaced our old brand drives with SHZK 300N T4 75kW units for our water treatment plant. After 14 months of continuous operation — zero trips, zero failures. The PID pressure control is rock solid.”
— Ahmed K.
Water Treatment Plant, UAE | 300N T4 75kW
“Our energy consumption dropped by 30% after installing SHZK VFDs on our pump system. The S3 series lets us run 380V three-phase motors from our single-phase 220V supply — perfect for our small workshop. Paid for itself in about 15 months.”
— Ricardo M.
Textile Factory, Brazil | 300N S3 5.5kW
“We ordered 200 units of the H2 series for our packaging line project. SHZK handled the OEM branding perfectly and delivered on schedule. The compact size of the H2 fits perfectly into our tight control cabinets.”
— James L.
System Integrator, Philippines | 300N H2 (OEM Order)
“The solar irrigation setup with SHZK 300N PV-T4 MPPT mode works flawlessly. Our borehole pump runs from 6am to 6pm without any grid power. Installation was straightforward — the manual is clear and the terminal layout is intuitive.”
— Ibrahim S.
Agricultural Farm, Nigeria | 300N T4 15kW
Real Project Cases
How SHZK 300N drives solve real-world challenges across industries
Frequently Asked Questions
How do I choose the right VFD for my application?
Selecting the right VFD depends on three key factors: motor power, input voltage, and load characteristics.
- Three-phase 380V supply → 300N T4 Series (0.75-800kW)
- Single-phase 220V supply, three-phase motor → S2 Series (220V output) or S3 Series (380V output)
- Single-phase motor control → H2 Series (0.75-3kW)
- Heavy-duty loads (cranes, hoists, conveyors) → Choose G-type with 150% overload
- Light-duty loads (fans, pumps) → P-type with 120% overload is sufficient
- Solar irrigation → PV-T4 / PV-T2 Series with MPPT/CVT solar tracking mode
Contact us for a free application consultation.
Why does my VFD trip during startup?
Common causes of VFD tripping during startup include:
- Overcurrent trip: The motor is starting under heavy load. Try increasing the acceleration time or selecting a VFD with a higher power rating.
- Overvoltage trip: Check input voltage stability. If the supply voltage is too high, install an input reactor.
- Overload trip: The load exceeds the VFD’s rated capacity. Verify motor nameplate current matches VFD rated output current.
- Phase loss: Check all three-phase connections are secure.
For persistent issues, our technical team can diagnose remotely.
Do I need to oversize the VFD for heavy-duty loads?
Yes, for applications that start under load or have frequent starts and stops, it is recommended to select a VFD rated one size above the motor nameplate power. This provides additional torque margin and prevents repeated overcurrent trips.
Heavy-duty applications include: cranes and hoists, belt conveyors under load, mixers, crushers, extruders, and centrifugal pumps with high static head.
Our 300N T4 Series offers G-type (heavy-duty) models with 150% rated current for 60 seconds and 180% for 3 seconds — specifically designed for these demanding conditions.
How can a VFD help reduce energy consumption?
A VFD reduces energy consumption by adjusting motor speed to match actual process demand instead of running at full speed continuously. In pump and fan systems, even a 20% speed reduction can result in nearly 50% energy savings due to the cube law relationship between speed and power.
Our 300N series features built-in PID control, enabling automatic speed adjustment based on pressure or flow feedback, maximizing energy efficiency without manual intervention.
What communication protocols are supported?
All SHZK 300N series come with standard RS485 Modbus RTU communication. This allows integration with PLCs, SCADA systems, and building management systems for remote monitoring and control.
For projects requiring additional protocols such as Profibus or Profinet, please contact us for optional communication cards.
What certifications do your VFDs have?
SHZK VFDs comply with international quality and safety standards including CE marking (EU LVD 2014/35/EU & EMC 2014/30/EU, UDEM certificate no. M.2026.206.C145141) for European markets. Our manufacturing follows ISO9001 quality management system requirements.
All products undergo 100% full-load aging test before shipment. Additional certifications (TUV, UL, etc.) can be arranged upon request for large-volume orders.
What is your warranty and after-sales support?
We provide a 18-month warranty from the date of shipment. Our technical support team offers:
- Remote troubleshooting via phone, email, or video call
- Detailed installation manuals and wiring diagrams
- Parameter configuration guidance
- Spare parts availability
For warranty claims or technical support, email us at mail@shzkvfd.com.
Can you provide OEM/ODM customization?
Yes! We offer comprehensive OEM/ODM services including:
- Custom logo and branding on product casing
- Custom packaging design
- Firmware parameter customization
- Special input/output configurations
- MOQ as low as 50 units for custom branding
Contact our sales team to discuss your customization requirements.
VFD Guides & Technical Insights
Learn how to select, wire, tune and troubleshoot SHZK variable frequency drives — written by our applications engineers.
Product Details & Internal Components
High-quality components and precision manufacturing in every SHZK VFD
