Danfoss VLT AutomationDrive FC 361 N110 User Manual

130BB956.12
THDv=0%
THDv=5%
Leakage current
Illustration 7.12 Line Distortion Inuences 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 ground
connection requirements:
•
Ground wire (terminal 95) of at least 10 mm
2
(8 AWG) cross-section.
•
2 separate ground wires both complying with the
dimensioning rules.
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.
•
Use RCDs with a delay to prevent faults due to
transient ground currents.
•
Dimension RCDs according to the system
congu-
ration and environmental considerations.
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.
130BB958.12
f
sw
Cable
150 Hz
3rd harmonics
50 Hz
Mains
RCD with low f
cut-
RCD with high f
cut-
Leakage current
Frequency
Illustration 7.13 Main Contributions to Leakage Current
The amount of leakage current detected by the RCD
depends on the cut-o frequency of the RCD.
130BB957.11
Leakage current [mA]
100 Hz
2 kHz
100 kHz
Illustration 7.14 Inuence of the RCD Cut-o Frequency on
Leakage Current
Electrical Installation Con... VLT® AutomationDrive FC 361
48 Danfoss A/S © 03/2019 All rights reserved. MG06K102
77

Danfoss VLT AutomationDrive FC 361 N110 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 361 N110
Category	DC Drives
Language	English