Powerful performance in extreme conditions
With one of the best power/size ratios, VACON® NXP Liquid Cooled drives are ideal for applications where space is at a premium or air cooling is difficult. Heavy industries with harsh operating conditions, such as in marine, offshore and mining environments benefit from the drive’s compact design and robust reliability.

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Like you, we've relied on VACON® drives forever. That shared legacy is why we built the iC7-Marine: the drive to power your future ambition.
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Liquid-cooled AC drives can be used in many combinations, from a single dedicated frequency converter to large-scale common DC bus systems. Packed with features, these fully standardized drives maximize the utilization of space while minimizing overall lifecycle costs.
As a high degree of protection (IP54 or higher) can easily be achieved with these drives, they can be installed almost anywhere in a plant or on a vessel. This eliminates the load on air-conditioning systems in electrical rooms reducing costs and installation time, and makes them ideal for retrofitting.
Servicing is fast and easy. Features such as safe torque off (STO) and safe stop 1 (SS1) improve safety, and conformal coated circuit boards enhance reliability.
NXA, NXN, NXB and NXI configurations
Active Front-end (NXA), Non-regenerative Front-end (NXN), Brake Chopper (NXB) and Inverter (NXI) configurations are available.
For more information about these configurations please refer to the VACON® NXP Common DC Bus selection guide.
Power range
- 3 x 400-500 V...132-4100 kW
- 3 x 525-690 V...110-5300 kW
Features and benefits
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Floor space requirements and infrastructure needs are reduced as the compact design needs no air ducts
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Investment savings as no large air-conditioning systems are needed due to minimal dissipation of heat loss to the air
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Fulfills all relevant international standards and global requirements including marine, safety, EMC and harmonics approvals
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Virtually silent operation as large cooling fans are not needed
Documents

iC7-Marine: Where your ambition has no limits
Space is precious - use it well. iC7-Marine modules are ultra-compact, occupying 40% less space in the e-room for a wealth of new opportunities.
See iC7-Marine benefits
| Type | Name | Language | Valid for | Updated | Download | File type |
|---|---|---|---|---|---|---|
| Brochure | Chemicals | English | Multiple | 21 Nov, 2021 | 10.5 MB | |
| Application guide | Encoder-less Safety using DOLD Module | English | Multiple | 14 Apr, 2017 | 5.9 MB | |
| Case story | Maximum Power for excavating uphill tunnels | English | Multiple | 24 Aug, 2023 | 6.9 MB | |
| Brochure | Mining and mineral processing | English | Multiple | 11 Nov, 2021 | 44.2 MB | |
| Application guide | VACON Condition-based Monitoring | English | Multiple | 23 Feb, 2023 | 1.2 MB | |
| Fact sheet | VACON NXP drive anti-sway functionality | English | Multiple | 27 Feb, 2023 | 569.0 KB | |
| Operating guide | VACON-NX-Line-Voltage-Measurement-OG | English | Multiple | 27 Mar, 2023 | 13.0 MB | |
| Design guide | VACON® Hybridization Design Guide | English | Multiple | 14 Jan, 2017 | 3.8 MB | |
| Application guide | VACON® NX All in One Application Guide | English | Multiple | 03 Jun, 2025 | 7.5 MB | |
| Application guide | VACON® NX BCU ABFIFF01V126 Appl. Man | English | Multiple | 28 Nov, 2023 | 745.3 KB | |
| Operating guide | VACON® NX Liquid Cooled Drives User Manual | English | Multiple | 10 Dec, 2025 | 22.3 MB | |
| Application guide | VACON® NX Marine APFIFF09V242 Appl. Man | English | Multiple | 28 Nov, 2023 | 3.3 MB | |
| Application guide | VACON® NX Sys Interf. APFIFF10V244 ApplM | English | Multiple | 14 Apr, 2019 | 808.0 KB | |
| Operating guide | VACON® NXP Advanced Safety Options | English | Multiple | 12 Sept, 2024 | 14.1 MB | |
| Application guide | VACON® NXP CraneContr APFIFF20v099 ApplM | English | Multiple | 14 Jan, 2021 | 2.7 MB | |
| Application guide | VACON® NXP Funct. Safety App.G for Lifts | English | Multiple | 14 Nov, 2019 | 1.4 MB | |
| Application guide | VACON® NXP HighSpeed APFIFF41V323 Manual | English | Multiple | 14 Jan, 2021 | 2.1 MB | |
| Application guide | VACON® NXP LineSynchII APFIFF44V120 AppM | English | Multiple | 14 Jun, 2021 | 1.9 MB | |
| Application guide | VACON® NXP Shaft Sync APFIFF11 Appl Man | English | Multiple | 14 Dec, 2015 | 1.1 MB | |
| Application guide | VACON® NXP SIA II APFIFF40V111 ApplM | English | Multiple | 28 Nov, 2023 | 3.0 MB | |
| Application guide | VACON® NXS-P FireM.PID ASFIFF11V210 AppM | English | Multiple | 14 Dec, 2015 | 229.5 KB | |
| White paper | Why supply land-based power | English | Multiple | 28 Feb, 2023 | 10.6 MB |
3D models and drawings
| Type | Name | Language | Updated | Download | File type |
|---|
Software
| Type | Software Characteristic | Name | Version | Language | Released | Status | Download | File type |
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Related applications
Compressors, wind turbines, extruders, pumps, fans, conveyors, crushers, thrusters, and propulsion, test-bench, crane, winch and power-conversion systems.

To optimize crane performance, Danfoss offers flexible control strategies combined with energy efficiency, operating within stringent safety requirements.

By controlling industrial pumps with a Danfoss AC drive you can help optimize processes and significantly reduce energy and maintenance costs.

Draw upon expertise from Danfoss to optimize energy storage solutions on board vessels, and shore power supplies for quieter and cleaner harbours.

For more efficient operation and greater freedom in ship design, consider an electric-based main propulsion with engineering from Danfoss.
Troubleshooting
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Need answers fast? Ask MyDrive® Assistant for help with your drive MyDrive® Assistant helps you to find information, answer common questions, or troubleshoot your motor drives and power converters. |

Fuel your ambition with iC7-Marine
Propelling peak performance, iC7-Marine is the unique maritime-dedicated drive ready to future-proof your vessels.
Get the iC7-Marine details
Case studies

Liquid-cooled VACON® active front-end drives control Tata Steel grabber crane, and the reliability of these AC drives is vital.

CMAL ferries use 38% less fuel than conventional vessels and emissions are reduced by a similar amount.

The Telstar saves 20% on operating costs compared to traditional tugboats.

Venturing into hybrid propulsion was a bold step for the Vranken family’s dry cargo bulk carrier business, which serves the inland waterways of the Rhine. It has paid off fast, delivering rock-bottom operating costs, thanks to an innovative diesel-electric propulsion system.

In 2009, Viking River Cruises commissioned the MV Viking Legend, the world’s first river cruiser with an energy and drive system based on a highly efficient DC bus. Since then they have built up a fleet of more than 50 hybrid ships.

On board the MS Nadorias, the huge potential in converting to hybrid is no longer a vision but a reality. A hybrid retrofit has given this inland container carrier a huge 15% saving not only in fuel, but also in CO2 emission. Since the main diesel engine now runs much less, there is 60% less maintenance cost and higher uptime than for its identical sister ship.
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