6kV 10kV High Voltage VFD Medium Voltage Drive Industrial Motor Control 400-25000kVA

Anyhz 6kV/10kV high voltage VFDs deliver comprehensive medium voltage drive solutions from 400kVA to 25,000kVA for large industrial motors. Using advanced cell series multilevel (CSM) topology with low-voltage IGBT power cells in series, these MV drives produce perfect sinusoidal output voltage without harmonic filters—ensuring reliable operation in the harshest industrial environments.

Designed for critical applications in power generation, petrochemical, mining, metallurgy, and cement industries, our high voltage drives provide soft start, speed regulation, and intelligent control for asynchronous and synchronous AC motors up to 10kV. With > 96% efficiency and >0.95 power factor, achieve 20-40% energy savings on boiler feed pumps, ID/FD fans, compressors, and conveyors while reducing mechanical stress and maintenance costs.

• Cell Series Multilevel (CSM) Technology: Perfect sine wave output, no harmonic filters needed, compatible with existing motors
• Wide Power Range: 400kVA to 25,000kVA covers applications from small pumps to large compressors
• Dual Voltage Support: 6kV and 10kV models with -20% to +5% input voltage tolerance
• Universal Motor Control: Asynchronous and synchronous motors, vector and V/F control modes
• Advanced Protection: Unit bypass, neutral drift, instantaneous power outage ride-through
• High Efficiency: >96% efficiency, >0.95 power factor reduces energy costs
• Proven Reliability: 18 years of MV drive manufacturing experience, global installations

Our cell series multilevel topology uses multiple low-voltage IGBT power cells connected in series to generate medium voltage output. Each cell operates at standard 690V DC bus voltage, making maintenance safe and components readily available. The multilevel output produces a near-perfect sine wave with <1% THD—no output filters required, eliminating motor insulation stress and bearing currents common in traditional two-level MV drives.

• Modular design: individual cell replacement without stopping the system
• Low voltage IGBTs: proven reliability, lower cost, easy sourcing
• Perfect sine output: compatible with standard motors, no derating needed

Based on advanced motor mathematical modeling, our flux vector control precisely regulates motor magnetic flux for optimal torque production. This delivers ± 0.5% speed accuracy (open-loop) or ±0.1% (closed-loop)—essential for coordinated multi-motor systems like conveyor belts or rolling mills. The 150% torque limit ensures high overload capacity for crushers, mills, and other heavy-load applications.

• Automatic motor parameter identification
• Torque enhancement for startup and low-frequency operation
• Speed search restart for rotating motor catch

When a power cell fails, our intelligent bypass system isolates only the faulty cell and adjusts the output voltage neutral point—maintaining continuous operation at reduced capacity. Choose mechanical bypass for cost-sensitive applications or electronic bypass for zero-maintenance operation. This "fault-tolerant" design achieves 99.9% availability, critical for power generation and continuous process industries.

• Automatic fault detection and cell isolation
• Neutral drift compensation maintains voltage balance
• Continuous operation at reduced power until maintenance

Our patented neutral drift technology dynamically adjusts the output voltage neutral point when bypassing faulty cells. This maintains three-phase voltage symmetry and prevents motor unbalance currents—unlike competitor drives that simply shut down or create severe voltage imbalance. The result is graceful degradation rather than catastrophic failure.

• Automatic voltage balance compensation
• Motor protection from phase unbalance
• Extended operation until scheduled maintenance

Industrial power grids experience momentary outages. Our instantaneous power outage function maintains continuous operation during brief power dips. For longer outages, the high voltage power loss self-start automatically restarts the drive and motor after power recovery—essential for unmanned operations like remote pumping stations or mining conveyors.

• 0.5-second power ride-through standard
• Auto-restart with speed search (no mechanical shock)
• Synchronized switching to grid power (optional)

For multi-motor coordinated systems, master-slave control links multiple drives for load sharing or synchronized operation. The optional synchronous switching cabinet enables bumpless transfer between VFD control and direct grid power—critical for processes that cannot tolerate interruption, such as boiler feed pumps or blast furnace blowers.

• Master-slave for dual or multi-drive coordination
• Torque or speed coupling modes
• Zero-disturbance grid/VFD switching

Power Generation

Boiler feed pumps, induced draft (ID) fans, forced draft (FD) fans —the largest energy consumers in thermal power plants. Replacing throttle/damper control with VFD speed control delivers 20-40% energy savings while improving combustion efficiency and reducing mechanical wear.

Key benefits: Soft start eliminates motor inrush, precise airflow control, reduced bearing and seal wear

Typical configuration: 6kV, 1000-5000kVA for 1000-6000kW motors

Recommended models: 6kV/1600kVA for feed pumps, 6kV/2500kVA for FD/ID fans

Petrochemical & Refining

Compressors, pumps, and fans in refineries and chemical plants operate in hazardous environments with critical safety requirements. Our explosion-proof designs and fault-tolerant topology ensure reliable operation while meeting ATEX/IECEx standards.

Key benefits: Precise flow/pressure control, surge prevention for compressors, emergency shutdown capability

Typical configuration: 6kV/10kV, 800-8000kVA for compressors and large pumps

Recommended models: 10kV/2000kVA for ethylene compressors, 6kV/1200kVA for refinery pumps

Mining & Minerals

Conveyor belts, crushers, ball mills, and hoists require high starting torque and coordinated multi-motor control. Our 150% torque limit and master-slave function handle heavy loads while synchronized switching prevents material spillage during power transfers.

Key benefits: Soft start reduces belt stress, load sharing for multi-drive conveyors, high-altitude derating

Typical configuration: 6kV/10kV, 500-10000kVA for conveyors up to 10km long

Recommended models: 10kV/3150kVA for main conveyors, 6kV/1000kVA for crushers

Metallurgy & Steel

Blast furnace blowers, rolling mills, and fan systems demand extreme reliability and high overload capacity. The 120% overload for 120 seconds design handles surge loads while flux vector control maintains precise speed for product quality.

Key benefits: High overload capacity, precise tension control for rolling mills, grid disturbance ride-through

Typical configuration: 10kV, 2000-20000kVA for blowers and mill drives

Recommended models: 10kV/10000kVA for blast furnace blowers, 6kV/5000kVA for rolling mills

Cement & Building Materials

Kiln drives, cooler fans, and dust collectors operate in dusty, high-vibration environments. Our IP30 protection and forced air/water cooling options ensure reliable operation while precise speed control optimizes clinker quality and energy consumption.

Key benefits: Precise kiln rotation control, optimized cooler airflow, reduced dust collector energy

Typical configuration: 6kV/10kV, 630-6300kVA for kilns and fans

Recommended models: 10kV/2500kVA for kiln drives, 6kV/1600kVA for cooler fans

Water & Wastewater

Large pumping stations and treatment plant blowers require reliable 24/7 operation with energy efficiency. Our instantaneous power outage ride-through and auto-restart ensure continuous service while PID control maintains precise flow/pressure.

Key benefits: Soft start eliminates water hammer, precise pressure control, sleep mode for low-demand periods

Typical configuration: 6kV/10kV, 400-5000kVA for pumps up to 4000kW

Recommended models: 6kV/1000kVA for distribution pumps, 10kV/4000kVA for main intake pumps

• Input Voltage Range: 2.3kV - 11kV (-20% to +5%), 50/60Hz ±10%
• Output Voltage: 0 to rated input voltage
• Output Frequency: 0-80Hz (standard), up to 400Hz (custom)
• Efficiency: >96% (at rated load)
• Power Factor: >0.95 (input), >0.96 (at rated speed)
• THDi (Input Harmonics): <3% (with optional input filter)
• THDu (Output Harmonics): <1% (no filter required)
• Control Methods: V/F control, sensorless vector control (SVC), closed-loop vector control (FVC)
• Speed Accuracy: ±0.5% (SVC), ±0.1% (FVC with encoder)
• Overload Capacity: 120% for 120 seconds, 150% instantaneous (customizable)
• Torque Limit: 10% - 150% (programmable)

• Input Protection: Overvoltage, undervoltage, phase loss, phase reversal
• Output Protection: Overcurrent, short circuit, ground fault, motor overload
• Drive Protection: IGBT overheat, cell failure, fan failure, control power loss
• Special Functions: Unit bypass, neutral drift, instantaneous power outage ride-through, auto-restart
• Safety Standards: CE, GB/T 12668, IEEE 519 (harmonics)
• Explosion Proof: ATEX/IECEx options available

• Cooling Methods: Forced air cooling (AF), water cooling (WF), air-water cooling (AFWF)
• Operating Temperature: -5°C to +45°C (derate above 45°C)
• Storage/Transport: -25°C to +55°C
• Humidity: <95% RH, no condensation
• Altitude: ≤1000m (derate 1% per 100m above)
• Protection Class: IP30 (IP41/54 optional)
• Dust: Non-conductive, non-corrosive, <6.5mg/dm³
• Cabinet Color: RAL 7035 (custom colors available)

• Standard Communication: RS-485 Modbus RTU
• Optional Protocols: Profibus-DP, Modbus TCP/IP, EtherNet/IP, DeviceNet
• Analog I/O: 3 inputs (4-20mA), 4 outputs (4-20mA)
• Digital I/O: 14 inputs, 22 outputs (8 programmable)
• Control Power: 380VAC, 30kVA

Bottom line: Anyhz cell series multilevel technology delivers superior performance and reliability compared to traditional two-level MV drives. The perfect sine wave output protects your motors, intelligent bypass ensures continuous operation, and modular design simplifies maintenance—all at a competitive price point.

Compared to Robicon Perfect Harmony, ABB ACS5000/6000, and Rockwell PowerFlex 6000, Anyhz high voltage VFDs offer identical CSM topology and performance with more flexible voltage options (2.3kV-11kV) and localized technical support in Asia-Pacific regions. Our 18 years of MV drive manufacturing experience and 1000+ global installations demonstrate proven reliability for critical industrial applications.

★★★★★ 4.8/5 based on 156 MV drive installations worldwide

• Indonesia Coal Power Plant (2024): 6 units 10kV/10000kVA for 2*600MW boiler feed pumps and FD fans
• Saudi Arabia Petrochemical Complex (2023): 4 units 6kV/5000kVA for ethylene compressor trains
• Peru Copper Mine Expansion (2023): 8 units 10kV/8000kVA for 8km overland conveyor system
• Russia Steel Mill Modernization (2023): 3 units 10kV/20000kVA for blast furnace blowers
• Vietnam Cement Plant (2022): 2 units 6kV/4000kVA for kiln drives and cooler fans
• South Africa Water Project (2022): 5 units 6kV/2500kVA for large pumping station

Cell Series Multilevel (CSM) technology uses multiple low-voltage IGBT power cells (typically 690V DC bus) connected in series to produce medium voltage output (6kV/10kV). This creates a staircase waveform that approximates a perfect sine wave with <1% THD—far superior to traditional two-level drives that output square-like waves with 3-5% THD. Benefits include: no output filters needed, compatibility with standard motors (no derating), lower motor insulation stress, and elimination of bearing currents. Additionally, individual cell failure only reduces capacity rather than shutting down the entire drive.

Yes —this is a major advantage of CSM topology. The perfect sine wave output (<1% THD) means Anyhz MV drives are compatible with standard NEMA/IE motors without derating or special insulation. Unlike two-level drives that require "inverter-duty" motors with enhanced insulation, you can typically use your existing motors. However, for motors over 10 years old or previously damaged, we recommend insulation testing. Our engineers can assess motor compatibility during the proposal stage.

Anyhz drives feature intelligent unit bypass. When a cell fails, the drive automatically isolates only that cell and adjusts the output voltage neutral point (neutral drift technology) to maintain three-phase balance. The drive continues operating at slightly reduced capacity (typically 90-95% power). This "graceful degradation" allows you to schedule maintenance during planned shutdowns rather than emergency stops. For critical applications, we recommend N+1 redundant cell configuration for full power even with one cell failed.

Typical energy savings range from 20% to 40% depending on the application:

• Pumps with throttle control: 20-30% savings (follow affinity laws—savings increase with speed reduction)
• Fans with damper control: 25-35% savings (similar to pumps)
• Compressors with unloaders: 15-25% savings (depends on load profile)
• Conveyors with soft starters: 10-20% savings (mainly from soft start and load sharing)

For a 1000kW motor running 8000 hours/year, 30% savings = 2,400,000 kWh/year. At $0.08/kWh, that's $192,000 annual savings —often with 2-3 year payback including installation.

Yes, we provide ATEX and IECEx certified designs for Zone 1 and Zone 2 hazardous areas. Options include:

• Pressurized enclosures (Type Ex p) with clean air purge
• Increased safety enclosures (Type Ex e) for non-sparking components
• Intrinsic safety (Ex i) for control circuits
• Sealed cooling systems to prevent gas ingress

All explosion-proof drives undergo third-party certification and are labeled accordingly. Contact our hazardous area specialists for project-specific compliance requirements.

Standard lead times are 12-16 weeks for 6kV/10kV drives up to 10,000kVA, and 16-20 weeks for larger units or complex customizations (explosion-proof, water cooling, synchronous switching). We maintain strategic inventory of power cells and control modules to expedite emergency replacements. For critical projects, we offer air freight options to reduce total delivery time by 4-6 weeks. Contact our project team for current lead times and expedited delivery options.