Brake Resistor And Resistor Cable; Checking The Compatibility With It (Ungrounded) Systems; Installation Alternatives - ABB ACS880-04 Hardware Manual

Brake resistor and resistor cable


Check the insulation of the brake resistor assembly (if present) as follows:
1. Stop the drive and do the steps in section
18 before you start the work.
2. Check that the resistor cable is connected to the resistor, and disconnected from the
drive output terminals R+ and R-.
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 by
using a measuring voltage of 1 kV DC. The insulation resistance must be higher than
1 Mohm.
ohm

Checking the compatibility with IT (ungrounded) systems

EMC filters +E200 and +E202 are not suitable for use in an IT (ungrounded) system. If the
drive is equipped with filter +E200, disconnect the filter grounding wire before connecting
the drive to the supply network. Insulate the end of the wire and attach it. The wire is
located behind the middle front cover.
WARNING! If a drive with EMC filter +E200 or +E202 is installed on an IT system
(an ungrounded power system or a high resistance-grounded [over 30 ohm]
power system), the system will be connected to earth potential through the EMC
filter capacitors of the drive. This can cause danger, or damage the drive.

Installation alternatives

You can install the drive module into a cabinet using different procedures depending on the
drive configuration. Obey the general power and control cable installation instructions that
we give in this chapter and see the installation example of your drive configuration in the
following chapters.
Precautions before electrical work
R+
R-
PE
Installation instructions 93
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