Ground-To-Phase Varistors; When To Disconnect Emc Filter Or Ground-To-Phase Varistor: Tn-S, It, Corner-Grounded Delta And Midpoint-Grounded Delta Systems - ABB ACH580-01 Hardware Manual
Hide thumbs
Also See for ACH580-01:
- Quick installation and start-up manual (412 pages) ,
- Hardware manual (396 pages) ,
- Installation, operation and maintenance manual (90 pages)
Table of Contents
Advertisement
116 Electrical installation – IEC
filter. See sections
When to disconnect EMC filter or ground-to-phase varistor: TN-S,
IT, corner-grounded delta and midpoint-grounded delta systems (page
Guidelines for installing the drive to a TT system (page
WARNING!
Do not install the drive with the EMC filter connected to a system that the filter is
not suitable for. This can cause danger, or damage the drive.
Note: When the internal EMC filter is disconnected, the drive EMC compatibility is
considerably reduced. See
￭
Ground-to-phase varistors
A drive with the ground-to-phase varistor connected can be installed to a symmetrically
grounded TN-S system. If you install the drive to another system, you may need to
disconnect the varistor. See sections
varistor: TN-S, IT, corner-grounded delta and midpoint-grounded delta
systems (page
116), and
WARNING!
Do not install the drive with the ground-to-phase varistor connected to a system
that the varistor is not suitable for. If you do, the varistor circuit can be damaged.
￭
When to disconnect EMC filter or ground-to-phase varistor: TN-S, IT,
corner-grounded delta and midpoint-grounded delta systems
Requirements for disconnecting EMC filter and varistor and additional requirements for
different electrical power systems are given below.
Frame
Symmetrically groun-
size
ded TN systems (TN-S
systems) ie. center-
grounded wye (A)
R1...R3
Do not disconnect EMC
R4 v2
or VAR screws.
R4...R5
Do not disconnect EMC
or VAR screws.
R6...R9
Do not disconnect EMC
or VAR screws.
EMC compatibility and motor cable length (page
When to disconnect EMC filter or ground-to-phase
Guidelines for installing the drive to a TT system (page
Corner-grounded (B1) and
midpoint-grounded delta
systems (B2)
≤ 600 V
Disconnect EMC screw.
Do not disconnect VAR
screw.
1)
Not evaluated
Do not disconnect EMC AC
or VAR screws.
Disconnect EMC DC screw.
116), and
117).
IT systems (ungrounded or
high-resistance grounded
[>30 ohms]) (C)
Disconnect EMC and VAR
screws.
Disconnect EMC screws (2
pcs) and VAR screw.
Disconnect EMC screws (2
pcs) and VAR screw.
290).
117).
Advertisement
Table of Contents
