Guidelines For Installing The Drive To A Tt System - ABB ACS580 Series Hardware Manual

178 Electrical installation – North America
2) Metal screw must not be used.
3) Frames R4 and R5 are evaluated for use on corner-grounded delta networks by UL standards. (R4 and
R5 frames are not to be used on IEC installations of corner grounded networks.)
Note: The VAR screw on R1...R3 also connects the EMC (AC) circuit internally within
the drive.
Note: Failure to remove a metal screw, when indicated in the table above, may
result in drive failure.
The table below shows the EMC filter and varistor screw kit parts by drive frame
size.
Frame size
R1...R3
R4 v2
R4...R9 Plastic EMC (DC), plastic EMC (AC)
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Guidelines for installing the drive to a TT system

The drive can be installed to a TT system under these conditions:
1. Residual current device has been installed in the supply system.
2. EMC filter has been disconnected by removing the metal screw. Otherwise
EMC filter leakage current will cause residual current device to trip. For R1...R3,
the metal VAR screw must be removed or replaced with plastic. For R4...R9,
the metal VAR screw must be installed.
Frame EMC filter screws
size
R1...R3
R4 v2
R4...R9 None or plastic (EMC DC or AC)
EMC filter screws
Plastic EMC (DC)
None or plastic
Ground-to-phase varistor screws
Ground-to-phase varistor (VAR) screw
Remove the metal screw
L1
L2
L3
N
Drive
Metal VAR
Metal VAR
Metal