ACH580 Installation, Operation and Maintenance Manual
17
ACH580-01 Installation
WARNING!
Do not install the drive with the EMC filter(s) or VAR circuit enabled to an
electrical power system that the filter is not rated for or unknown. This can cause
danger and/or damage the drive.
NOTE:
When the internal EMC filter(s) is disconnected, the EMC protection of the
drive is considerably reduced.
Identifying different types of electrical power systems:
The power network can be determined with a RMS multimeter. Once identified, the
EMC and VAR
screws
may be properly configured for that power system.
Table: Power system identification
1. Input voltage line to line (UL-L)
2. Input voltage line 1 to ground (UL1-G)
3. Input voltage line 2 to ground (UL2-G)
4. Input voltage line 3 to ground (UL3-G)
T - Terra (ground)
N - Neutral
C - Combined
S - Separate
I - Isolated
TN-S = Tera Neutral - Separate
Earth and Neutral have separate conductors (3 wire single phase L, N, E).
IT = Isolated Neutral
Earth is either ungrounded or high-resistive (>30 ohms) non-symmetrical earth path.
TT = Tera Tera
Earth at source and Earth a Destination (no earth conductor between source and
consumer, the soil is used as the earth return path.
U
L-L
U
L1-G
U
L2-G
U
L3-G
Electrical power system type
Figure
X
0.58x
0.58x
0.58x
TN System
(Symmetrically grounded wye)
A
X
1.0x
1.0x
0
Corner-grounded Delta System
(non-symmetrical)
B
X
0.866x
0.5x
0.5x
Midpoint-grounded Delta System
(non-symmetrical)
C
X
Varying
level
versus
time
Varying
level
versus
time
Varying
level
versus
time
IT System
(ungrounded or high-resistance-grounded [>30 ohms])
non-symmetrical
D
X
Varying
level
versus
time
Varying
level
versus
time
Varying
level
versus
time
TT System
(the protective earth connection for the customer is
provided by a local earth electrode, and there is another
independently installed at the generator.
E
ACH580_Inst_Op_Maint_Rev G.book Page 17