When To Connect Emc Filter Or Disconnect Ground-To-Phase Varistor: Tn-S, It, Corner-Grounded Delta And Midpoint-Grounded Delta Systems - ABB ACH580-01 Hardware Manual


When to connect EMC filter or disconnect ground-to-phase varistor:
TN-S, IT, corner-grounded delta and midpoint-grounded delta
systems
Frame Screw
size label
R1...R3 EMC (DC) Plastic
VAR
3)
R4...R9 EMC (AC) Plastic
EMC (DC) Plastic
VAR
A
Drive
A
Drive
1)
You can install metal screw and connect the EMC filter if you are concerned with EMC issues.
2)
Metal screw must not be used, plastic screw may be maintained or removed from the AC
EMC circuit.
3)
Frames R4 and R5 are evaluated for use on corner-grounded delta networks by
Configure the EMC filter based on the electrical system of
the installation site
Factory Symmetrically
default grounded TN
screw systems (TN-S
material systems), ie.
center-grounded-
wye (A)
Can install the
metal screw
Metal Maintain the metal
screw
Can install the
metal screw
Can install the
metal screw
Metal Maintain the metal
screw
L1
L2
L3
N
PE
L1
L2
L3
N
PE
Electrical installation – North America 171
Corner-grounded
delta (B1) and
midpoint-
grounded (B2)
delta systems
Maintain the plastic
1) 2)
screw
Remove the metal
screw
Maintain the plastic
1) 2)
screw
Maintain the plastic
1) 2)
screw
Maintain the metal
screw
B1
L1
L2
L3
PE
Drive
B2
L1
L2
L3
PE
Drive
IT systems
(ungrounded or
high-resistance
grounded [>30
ohms]) (C)
Maintain the plastic
2)
screw
Remove the metal
screw
Maintain the plastic
2)
screw
Maintain the plastic
2)
screw
Remove the metal
screw
C
L1
L2
L3
Drive
UL
NEC