Danfoss VLT AutomationDrive FC 360 Design Manual page 64

Design Guide | VLT® AutomationDrive FC 360
Leakage current
Figure 29: Line Distortion Influences Leakage Current
If the leakage current exceeds 3.5 mA, compliance with EN/IEC61800-5-1 (power drive system product standard) requires special care.
Reinforce grounding with the following protective earth connection requirements:
Ground wire (terminal 95) of at least 10 mm
l
2 separate ground wires both complying with the dimensioning rules.
l
See EN/IEC61800-5-1 and EN 50178 for further information.
Using RCDs
Where residual current devices (RCDs), also known as Ground Leakage Circuit Breakers, are used, comply with the following:
Use RCDs of type B only as they can detect AC and DC currents.
l
Use RCDs with a delay to prevent faults due to transient ground currents.
l
Dimension RCDs according to the system configuration and environmental considerations.
l
The leakage current includes several frequencies originating from both the mains frequency and the switching frequency. Whether the
switching frequency is detected depends on the type of RCD used.
62
| Danfoss A/S © 2024.01
THDv= 0%
THDv= 5%
2
(8 AWG) cross-section.
AJ435824192086en-000101 / 130R1295