VACON® NXP Liquid Cooled Common DC Bus

Easy integration – ultimate flexibility

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.

The VACON® NXP range of common Liquid Cooled DC bus drive products includes front-end units, inverters and brake-chopper units. They ensure all energy within a system is effectively utilized and redistributed.

Common DC bus components can be used in many different combinations. In a regenerative DC bus system, the front-end unit generates power back to the mains network. This is suitable for processes where braking is needed often and the braking power is relatively high. In a non-regenerative system, braking power is redistributed to other drives in the system and possible excess power can be dissipated as heat using an optional brake chopper and brake resistors. This is ideal for small production lines where braking is needed less often.

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.

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.

Discontinued enclosure sizes

Enclosure sizes CH3 and CH4 have reached the Limited phase of their lifecycle and were discontinued in 2021. In this phase, Danfoss offers assistance using services such as DrivePro® Spare Parts, DrivePro® Retrofit, and in some cases, DrivePro® Preventive Maintenance.

Supply voltages and power range

• 3 x 400-500 V...7.5-4100 kW
• 3 x 525-690 V...110-5300 kW

Features and benefits

Reduced energy costs as regenerative filter feeds excess braking energy back into network

Investment costs are low as a result of reduced power cabling and installation time

Cost and space savings as optimized module design reduces need for additional engineering and cabinet space

Lower system complexity thanks to five built-in expansion slots for additional I/O, fieldbus and functional safety boards

Improvements in drive line-up tolerance to voltage dips/sags and minimized harmonic distortion are possible as a result of the active front-end unit

Easy installation of compact option boards