1000 V DC,
> 100 Mohm
U1-PE, V1-PE, W1-PE
ohm
M
3~
U1
V1
W1
PE
￭ Brake resistor assembly for R1…R3
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 22)
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
The standard drive can be an be installed to a symmetrically grounded TN-S system.
For other systems, see sections EMC filter and Ground-to-phase varistors (page 116)
below.
￭ EMC filter
A drive with EMC filter connected can be installed to a symmetrically grounded TN-S
system. If you install the drive to another system, you may need to disconnect the EMC
Electrical installation – IEC 115
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