Guidelines For Installing The Drive To A Tt System - ABB ACH580-01 Hardware Manual

Frame Symmetrically groun-
size ded TN systems (TN-S
systems) ie. center-
grounded wye (A)
A
Drive
1) Frames R4 and R5 are not evaluated for use on corner-grounded systems or midpoint-grounded delta systems
by IEC standards.
Note: These are the EMC filter and varistor screws of different drive frame sizes.
Frame size
R1...R3
R4 v2
R4...R5
R6...R9
￭

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. These screws have been disconnected. Otherwise EMC filter and ground-to-phase
varistor capacitor leakage current will cause the residual current device to trip.
Corner-grounded (B1) and
midpoint-grounded delta
systems (B2)
≤ 600 V
L1
L2
L3
N
PE
EMC filter screws
EMC screw
Two EMC screws
Two EMC screws
Electrical installation – IEC 117
IT systems (ungrounded or
high-resistance grounded
[>30 ohms]) (C)
B1
L1
L2
L3
PE
Drive
B2
L1
L2
L3
PE
Drive
Ground-to-phase varistor screws
C
L1
L2
L3
Drive
VAR
VAR
VAR