Residual Current Device - Danfoss vlt aqua Design Manual

5 How to Install

5.12.1 Residual Current Device

You can use RCD relays, multiple protective grounding or grounding as extra protection, provided that local safety regulations are complied with.
If a ground fault appears, a DC content may develop in the faulty current.
If RCD relays are used, you must observe local regulations. Relays must be suitable for protection of 3-phase equipment with a bridge rectifier and for
a brief discharge on power-up see section
5
5-58
Ground Leakage Current
for further information.
MG.20.N5.22 - VLT
®
is a registered Danfoss trademark
®
VLT AQUA Drive Design Guide