PWM frequency inverter iC7-Aqua

three-phasevector controlModbus

Overview
The iC7-Aqua is a next-generation variable frequency drive (VFD) specifically engineered for water and wastewater applications to optimize pump control, improve system performance, reduce mechanical stress, and deliver significant energy savings. It supports municipal water distribution, wastewater treatment, desalination and industrial water purification. The product family includes standard and ULH (Ultra Low-Harmonic) variants for sensitive power grids.

Key benefits

• Save significant energy: meeting actual system demand by adjusting pump speed reduces energy consumption (e.g. reducing pump speed by ~20% can lead to large energy savings).
• Reduce mechanical wear: soft starting and stopping reduces water hammer and mechanical stress on pipes, valves and pumps.
• Improve process control: maintain constant pressure, flow or water level with high precision.
• Embedded pump protection: features such as dry-run detection, end-of-curve detection and pipe-fill/check-valve ramp protect pumps and piping.
• ULH variants: ultra-low harmonic drives for installations with strict harmonic distortion limits (protects sensitive equipment and can avoid extra power factor correction).
• Seamless integration: embedded fieldbus options and modern connectivity for easy integration into automation systems.

How a VFD works on a pump

• The VFD controls pump speed to match flow/pressure demands rather than running at fixed full speed.
• By adjusting speed, the drive reduces energy use, decreases mechanical stress, and improves operational control.

Supply voltage and power range
Standard drives: 3 x 380-480 V AC … 0.37-710 kW (0.5-1000 hp)
ULH drives: 380-480 V AC … 22-160 kW (30-250 hp)

Variants and targeted use

• Standard iC7-Aqua: general pump applications with full feature set for protection, energy optimization and system control.
• iC7-Aqua ULH (Ultra Low-Harmonic): for applications with sensitive power grids or strict harmonic limits; provides a clean power profile and maintains low THDi.

Highlights — control, safety and usability

• Dedicated pump and application protection: dry run detection, end-of-curve detection, pipe fill mode and check valve ramp to eliminate water hammer.
• Condition monitoring: integrated protection monitoring motor stator winding, vibration and load envelope to provide early warnings and reduce downtime.
• Energy and cost savings: flow compensation, sleep mode, multi-pump controller, Automatic Energy Optimization (AEO) and Automatic Motor Adaptation (AMA) for improved part-load efficiency.
• Intuitive commissioning and operation: graphical control panel with large display, setup assistants and MyDrive® Suite tools (monitoring, parameterization, troubleshooting).
• Seamless integration and security: embedded fieldbus options (EtherNet/IP, PROFINET, Modbus TCP, EtherCAT, Modbus RTU), hardware-level cybersecurity and integrated functional safety (STO) meeting high safety levels.

ULH (Ultra Low-Harmonic) specific advantages

• Maintains total harmonic current distortion (THDi) typically < 3% at full load (and low values at partial load), reducing disturbances to the power network.
• Power factor of 1.0 achievable, potentially removing the need for external power factor correction.
• Compact, fully integrated single-unit design that simplifies installation and reduces the need to oversize system components (transformers, switchgear).

Documentation & tools (selection)
Comprehensive product documentation, fact sheets, design guides and software tools are available for configuration, installation, monitoring and integration of the iC7-Aqua series.

Caractéristiques / spécifications techniques

• Product family: iC7-Aqua (standard and ULH variants)
• Supply voltage (standard): 3 x 380–480 V AC
• Power range (standard): 0.37–710 kW (0.5–1000 hp)
• Power range (ULH): 22–160 kW (30–250 hp)
• ULH THDi: typically < 3% at full load
• Power factor: up to 1.0 (ULH)
• Protection functions: dry-run detection, end-of-curve detection, pipe-fill mode, check valve ramp
• Condition monitoring: motor stator winding, vibration and load envelope monitoring
• Energy features: flow compensation, sleep mode, multi-pump controller, AEO, AMA
• Safety & security: integrated hardware-based cybersecurity, crypto chip, integrated functional safety (STO)
• Connectivity: embedded fieldbus options including EtherNet/IP, PROFINET, Modbus TCP, EtherCAT, Modbus RTU
• User interface: graphical control panel with large display and setup assistants
• Design: compact fully integrated units (3-wire in / 3-wire out for many variants)