Installation In A Corner-Grounded Network; Grounding - Danfoss VACON NXS Series Operating Manual

Operating Guide | VACON® NXS/NXP Air-cooled
A
C
A The PE conductor and the shield
C The shield
Illustration 16: Cables with PE Conductors
In all the enclosure sizes, to comply with the EMC standards, use the default values of the switching frequencies.
When using 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
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 that is a minimum of 120 R
SC

6.2.1 Installation in a Corner-grounded Network

Corner-grounding can be used with the drive types (FR4 to FR9) with a rating of 3–300 A with a 208–240 V mains, and 261–730 A with a
380–500 V mains. In these conditions, change the EMC protection level to C4. See the instructions in
Do not use corner-grounding with the drive types (FR4 to FR8) with a rating of 3–205 A with a 380–500 V mains or with a 525–690 V
mains.
Corner-grounding is permitted for the FR4–FR9 drives (main voltage 208–240 V) up to 3000 m and for the FR9–FR11 drives (main
voltage 380–500 V) up to 2000 m.

6.3 Grounding

Ground the AC drive in accordance with applicable standards and directives.
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.
Danfoss A/S © 2020.02
B
. If necessary, contact the mains operator.
SCE
B The PE conductors
SC
C A U T I O N
Electrical Installation
must be a minimum of 120 R
6.6 Installation in an IT
AQ275638903263en-000301 / DPD00910| 45
at the
SCE
System.