7.5 INSTALLATION IN A CORNER-GROUNDED NETWORK
You can use corner grounding with the enclosed drive sizes MR8-MR12 with a 380-480 V
mains and with a 208-240 V mains. In these conditions, you must change the EMC protection
level to C4. See the instructions in chapter 7.6 Installation in an IT system.
7.6 INSTALLATION IN AN IT SYSTEM
If your mains is impedance-grounded (IT), the AC drive must have the EMC protection level
C4. If your drive has the EMC protection level C3, it is necessary to change it to C4. To do this,
remove the EMC jumper.
WARNING!
Do not make changes in the AC drive when it is connected to mains. The
components of the drive are live when the drive is connected to mains.
CAUTION!
Before you connect the AC drive to mains, make sure that the EMC level of the drive
is correct. An incorrect EMC level can cause damage to the drive.
7.6.1 THE EMC JUMPER IN MR8
Change the EMC protection of the AC drive from level C3 to level C4.
1 Open the cover of the AC drive.
2 Find the EMC box. To get access to the EMC
jumper, remove the cover of the EMC box.
A. The EMC jumper
3 Remove the EMC jumper. Attach the cover of the
EMC box again.
COMMISSIONING AND ADDITIONAL INSTRUCTIONS VACON · 87
LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/
7
To Next Page
Loading...
