1. Stop the drive and do the steps in section Electrical safety precautions (page 21)
before you start the work.
2. Make sure that the resistor cable is connected to the resistor and disconnected
from the drive output terminals.
3. At the drive end, connect the R+ and R- conductors of the resistor cable together.
Measure the insulation resistance between the conductors and the PE conductor
with a measuring voltage of 1000 V DC. The insulation resistance must be more
than 1 Mohm.
R-
R+
ohm
PE
1000 V DC,
> 1 Mohm
Grounding system compatibility check – IEC, not North
America
This section is valid for the IEC drive types.
Default wires – Global (IEC) except North AmericaFrame
VAREMC
ConnectedConnectedR10, R11
￭ EMC filter compatibility
The drive has an internal EMC filter (+E210) as standard. You can install the drive with
the EMC filter connected to a symmetrically grounded TN-S system, IT system,
corner-grounded delta, mid-point-grounded delta and TT system.
Note: If you disconnect the EMC filter, the electromagnetic compatibility of the drive
decreases.
￭ Ground-to-phase varistor compatibility
The drive is equipped with an internal ground-to-phase varistor as standard. You can
install the drive with the ground-to-phase varistor connected to a symmetrically
grounded TN-S system, corner-grounded delta and mid-point-grounded delta system.
If you install the drive to an IT system or a TT system, you need to disconnect the
varistor. See section Ground-to-phase varistor disconnecting instructions – IEC, not
North America (page 281).
Electrical installation 103
To Next Page
Loading...
