Parker Hannifin S.p.A S.B.C. Division
SLVDN User’s Manual
Page 33 of 181
Note 1:
The EMC filter can be connected upstream or downstream from the auto-transformer. If it is
connected upstream, it may be necessary to use a shielded cable between the auto-transformer
and the SLVD-N. If it is connected downstream, the cable between the filter and the SLVD-N
must be as short as possible and it cannot exceed 30 cm.
Note 2:
Use the following formula to dimension the transformer:
(
)
Pt
Paz
n
=
⋅
+
⋅
+
17 80
173
2
.
.
where
Pt
is the power in VA of the transformer,
Paz
is the sum of the rated powers of the
motors in W and
n
is the number of powered drive units.
Direct connection to 230V
∼
power
(10, 15 and 17 versions have two PE pins)
Note 3:
The cable connecting the filter and the SLVD-N must be as short as possible
and in no case can it exceed 30 cm.
If the unit is connected directly to the mains, currents on the order of 100A may be required
when it is powered on for less than 3 ms. Therefore, protection fuses should be used. If many
units are installed in parallel, a sequential power supply procedure is recommended.
Mono phase connection
If a mono-phase connection is used (between L1-L2, or L2-L3, or L1-L3), a derating of the
power supplied by the SLVD-N converter is obtained (see the appendix).
