￭
Measuring the insulation resistance of the brake resistor circuit
WARNING!
Obey the safety instructions of the drive. If you ignore them, injury or
death, or damage to the equipment can occur. If you are not a qualified
electrical professional, do not do installation, commissioning or
maintenance work.
1. Stop the drive and do the steps in section Electrical safety
precautions (page 16) 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
￭
EMC filter
The drive has an internal EMC filter as standard. You can install the drive to a
symmetrically grounded TN-S system. If you install the drive to another system,
you must disconnect the EMC filter.
Note: If you disconnect the EMC filter, the electromagnetic compatibility of the
drive decreases.
WARNING!
Do not install a drive with the internal EMC filter connected to a grounding
system that the EMC filter is not compatible with (for example, an IT system).
The supply network becomes connected to ground potential through the
internal EMC filter capacitors, which can cause danger or damage to the
drive.
Electrical installation 63
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