Brake Resistor Assembly For R0; Checking The Compatibility With It (Ungrounded) And Corner-Grounded Tn Systems - ABB ACS580-01 Hardware Manual


Brake resistor assembly for R0...R3
Check the insulation of the brake resistor assembly (if present) as follows:
1. Check that the resistor cable is connected to the resistor, and disconnected from
the drive output terminals R+ and R-.
2. At the drive end, connect the R+ and R- conductors of the resistor cable together.
Measure the insulation resistance between the combined conductors and the PE
conductor by using a measuring voltage of 1 kV DC. The insulation resistance
must be higher than 1 Mohm.
Checking the compatibility with IT (ungrounded) and
corner-grounded TN systems
The internal EMC filter is not suitable for use on an IT (ungrounded) system or on a
corner-grounded TN system. Disconnect the EMC filter before connecting the drive to
the supply network. Check the table on page 76.
WARNING! Do not install the drive with the internal EMC filter connected on an
IT system (an ungrounded power system or a high-resistance-grounded [over
30 ohms] power system), otherwise the system will be connected to ground potential
through the EMC filter capacitors of the drive. This can cause danger, or damage the
drive.
Do not install the drive with the internal EMC filter connected on a corner-grounded
TN system, otherwise the drive will be damaged.
Note: When the internal EMC filter is disconnected, the drive EMC compatibility is
considerably reduced. See section
page 150.
1000 V DC,
ohm
> 1 Mohm
EMC compatibility and motor cable length
Electrical installation 75
R+
R-
PE
on