In all the enclosure sizes, to comply with the EMC standards, use the default values of the switching frequencies.
If installing a safety switch, make sure that the EMC protection continues from the start of the cables until their ends.
The drive must obey the standard IEC 61000-3-12. To obey it, the short circuit power S
SC
must be a minimum of 120 R
SCE
at the
interface point between mains and the public mains. Make sure to connect the drive and the motor to mains with a short circuit power
S
SC
that is a minimum of 120 R
SCE
. If necessary, contact the mains operator.
6.2.1 Installation in a Corner-grounded Network
Corner grounding can be used in these conditions:
•
Enclosure sizes MR4-MR6 with mains voltage 208–240 V up to 2000 m
•
Enclosure sizes MR7-MR9 with a rating of 75–310 A and with mains voltage 208–240 V
Enclosure sizes MR7-MR9 with a rating of 72–385 A and with mains voltage 380–500 V
Do not use corner grounding in these conditions:
•
Enclosure sizes MR4-MR6 with a rating of 3.4–61 A and with mains voltage 380–500 V
•
Drives with mains voltage 525–600 V or 525–690 V
When using corner grounding, the drive must have EMC protection level C4. To change the EMC protection level from C2 or C3 to C4,
see instructions in
6.6 Installation in an IT System
.
6.3 Grounding
Ground the AC drive in accordance with applicable standards and directives.
CAUTION
DAMAGE TO THE AC DRIVE FROM INSUFFICIENT GROUNDING
Not using a grounding conductor can damage the drive.
-
Make sure that the AC drive is always grounded with a grounding conductor that is connected to the grounding terminal
that is identified with the PE symbol.
WARNING
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the drive properly can result in death or serious injury.
-
Ensure the correct grounding of the equipment by a certified electrical installer.
The standard EN 61800-5-1 tells that 1 or more of these conditions for the protective circuit must be true.
The connection must be fixed.
•
The protective earthing conductor must have a cross-sectional area of minimum 10 mm
2
Cu or 16 mm
2
Al. OR
•
There must be an automatic disconnection of the mains, if the protective earthing conductor breaks. OR
•
There must be a terminal for a second protective earthing conductor in the same cross-sectional area as the first protective
earthing conductor.
Electrical Installation
Operating Guide | VACON® 100 Wall-mounted Drives
AQ298036140958en-000101 / DPD01711| 35
Danfoss A/S © 2019.05
Summary of Contents for VACON 100 flow
Page 2: ......