1000 V DC,
>
100 Mohm
U1-PE, V1-PE, W1-PE
M
3~
U1
V1
W1
PE
ohm
￭ Measuring the insulation 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 or
maintenance work.
1.
Stop the drive and do the steps in section Electrical safety precautions (page 17)
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
1 kV DC,
> 1 Mohm
Grounding system compatibility check
The standard drive 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 filter and
ground-to-phase varistor. See ACS880 frames R1 to R11 EMC filter and ground-to-phase
varistor disconnecting instructions (3AUA0000125152 [English]).
Electrical installation – IEC 91
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