ABB ACS 501 - ACS 501 - 007 to 040

Chapter 6 – Service and Maintenance
ACS 501 Installation & Start-up Manual 6-9
Insulation Test
1. Follow Resistance Test Steps 1 – 4, above.
2. Set the insulation tester to the 500 V DC range and test Capacitors C6
and C8 according to Table 6-2.
Table 6-2 Insulation Test Positions and Values
3. Continue with each measurement until the reading stabilizes or until the
reading suddenly falls.
4. If the reading suddenly falls, replace the capacitors. Contact your ABB
Technical Support.
ACS 501 – 007 to 040
Resistance Test
1. Disconnect and lock out power from the ACS 501.
WARNING! Wait at least five minutes after disconnecting power from the
drive before you attempt to service the drive. Bus capacitors in the
intermediate circuit must discharge before servicing the drive. Check for zero
volts at Terminals X50:21 – 29 and X2:(+) and (-) or between the input
terminal block X1 and Terminal Block X2:(+) if an internal brake option is
installed. Failure to check voltage may result in death or serious injury.
2. Check for zero volts at Terminals X50:21 – 29 and X2:(+) and (-) or
between the input terminal block X1 and Terminal Block X2:(+) if an
internal brake option is installed.
CAUTION: Electrostatic Discharge (ESD) can damage electronic circuits.
Do not handle any components without following the proper ESD
precautions.
Note: When disconnecting wires from components and terminals, mark the
wires to correspond to their component and terminal connections.
Drive Capacitor Meggar (+) Test Probe Meggar (-) Test Probe Reading, V DC
002 C6 Terminal X7 Card edge side of R3 500
C8 Card edge side of R3 Terminal X2:(-) 500
003 C6 Terminal X7 Card edge side of R3 500
C8 Card edge side of R3 Terminal X2:(-) 500
005 C6 Terminal X7 Card edge side of R3 500
C8 Card edge side of R3 Terminal X2:(-) 500