￭
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 18) 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
This section is applicable to the IEC drive types.
￭
EMC filter
The drive has an internal EMC filter as standard. You can install a drive that has
the internal EMC filter connected to a symmetrically grounded TN-S system
(center-grounded wye). For other systems, refer to Compatibility of EMC filter and
ground-to-phase varistor with the grounding system (page 66).
Note: If you disconnect the EMC filter, the electromagnetic compatibility of the
drive decreases.
Electrical installation – IEC 65
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