ABB ACH580 Series Installation, Operation And Maintenance Manual page 15

ACH580 Ultra-Low Harmonic Drives Installation, Operation and Maintenance Manual
When to disconnect EMC filter or ground-to-phase varistor: TN-S, IT,
Corner-grounded delta, and Midpoint-grounded delta systems
Frame
size
R3
R6
R8
Note 1:Frames R3 and R6 are evaluated for use on Corner-grounded and Midpoint-grounded delta
systems by UL standards. Disconnect EMC DC screw. Do not disconnect EMC AC or VAR screws.
Frames R3 and R6 are not evaluated by IEC standards for use on Corner-grounded or
Midpoint-grounded systems.
Frame Size
* VAR screw also functions as the EMC AC screw in R8.
Symmetrically grounded
1
TN-S systems
Do not disconnect EMC or
VAR screws
Do not disconnect EMC or
VAR screws
Do not disconnect EMC or
VAR screws
1
L1
L2
L3
N
PE
Drive
EMC and varistor screws for R3, R6, and R8 Frames
EMC filter screws
R3
R6 EMC AC, EMC DC
R8
Corner-grounded and
Midpoint-grounded delta
2
systems
Do not disconnect EMC or
VAR screws
See Note 1 below.
Disconnect EMC and VAR
screws
2
L1
L2
L3
PE
Drive
2
L1
L2
L3
PE
Drive
EMC
EMC DC
ACH580 Ultra-Low Harmonic Drives Installation
IT systems (ungrounded or
high-resistance grounded
[>30 ohms])
Disconnect EMC and VAR
screws.
Disconnect EMC AC, EMC DC
and VAR screws.
Disconnect EMC and VAR
screws.
3
L1
L2
L3
Drive
Ground-to-phase varistor screws
VAR
VAR
VAR*
15
3