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Ensure safe DC-grid selectivity

VACON® NXP DCGuard™ enables fast disconnection and full selectivity be­tween DC grids for all VACON® NXP series drives.

Utilizing DC grids rather than AC grids enables power distribution with lower power losses. However, ensuring selectivity and limited short circuit energy requires more sophisticated protection devices.

VACON® NXP DCGuard™ is a semiconduc­tor protection device that maintains the stability of the DC grid by detecting and cutting off any faulty DC currents, fast. It isolates the faulty part of the system within 5 microseconds, protecting the surrounding equipment and ensuring uninterrupted operation.

VACON® NXP DCGuard has DNV-GL, ABS, and Lloyd's Register type approvals, simplifying system approval for use in marine environments.

Current range

465-800 VDC………3-4140 A

640-1100 VDC…..….4-3100 A

Features and benefits

  • Correct system selectivity due to short circuit protection
  • No overvoltage spikes at current cut-off
  • Connect two different DC grids with voltage differences up to full DC voltage, thanks to controlled voltage ramp-up
  • Transmission cable overload protection
  • Reliable, proven technology

DC grids and selectivity using VACON® NXP DCGuard™

Utilizing DC grids instead of AC grids can improve system efficiency and system footprint by up to 20%. And there is a significant potential for energy saving especially when combining DC grids, energy storage and/or variable speed generators.


Type Name Language Valid for Updated Download File type
Certificate ISO 9001 Drives BV 500F1065en English Multiple 01 Jan, 2019 627.9 KB PDF
Certificate VACON NX ABS 19-LD1848307-PDA English Multiple 01 Mar, 2020 497.9 KB PDF
Certificate VACON NX ABS 19-LD1848307-PDA-DUP English Multiple 01 Sep, 2019 2.0 MB PDF
Certificate VACON NX ABS 19-LD1851904-PDA English Multiple 01 Jul, 2021 359.7 KB PDF
Certificate VACON NXP DC Guard CCS SW18Q00002_02 English Multiple 01 Jan, 2019 1.8 MB PDF
Certificate VACON NXP DC Guard CCS SW20PTA00002_02 English Multiple 01 Nov, 2020 250.2 KB PDF
Certificate VACON NXP DCGuard BV 52998_A0 English Multiple 01 Feb, 2019 420.7 KB PDF
Certificate VACON NXP DCGuard LR 18-00076 English Multiple 01 Nov, 2018 5.0 MB PDF
Application guide VACON® NXP DCGuard Application Guide English Multiple 27 Jul, 2022 2.0 MB PDF
Design guide VACON® NXP DCGuard Design Guide English Multiple 05 Dec, 2018 3.5 MB PDF
Operating guide VACON® NXP DCGuard Operating Guide English Multiple 13 Nov, 2018 2.4 MB PDF
Fact sheet VACON® NXP DCGuard™ English Multiple 05 Mar, 2019 517.3 KB PDF


Type Name Language Updated Version Status Download File type
Application Software VACON® NXP DCGuard Application 03 Jul, 2023 053 RL 2.3 MB ZIP
Fieldbus Configuration Files VACON® OPTEA SIMATIC PDM EDD 13 Nov, 2018 RL 461.7 KB ZIP