Parker Hannifin S.p.A. - Divisione S.B.C. LVD User’s Manual
16
2.5 Power connections
For the motor cable
Choose between a cable for fixed or floating installation. The cable must be shielded and
suitably sized in terms of insulation and wire sections. Reticulated polypropylene is the
preferred insulation material. Length (max. 35 m); note that conductor-conductor capacitance
must not exceed 8 nF. Minimum wire size is 1.5 mm
2
for
LVD1,
LVD2
and
LVD5,
2.5 mm
2
for
LVD10
and 4 mm
2
for
LVD15
For the mains power cable
Power cables must not be screened. Minimum wire size is 1.5 mm
2
for
LVD1,
LVD2
and
LVD5,
2.5 mm
2
for
LVD10
and 4 mm
2
for
LVD15.
Input fuses must be rated as follows:
MODEL
slo-blo fuses (A)
LVD1
6
LVD2
6
LVD5
10
LVD10
16
LVD15
20
The fuses can be replaced with a thermal-magnetic circuit breaker selected in relation to the
power cables utilised.
Resolver cable
The cable must be composed of 3 twisted pairs with individual screens and one common
screen. Conductor-conductor capacitance for the length of cable utilised must not exceed 10
nF; wire section must be at least 0.35 mm
2
. Maximum permissible length is 35 m.
24V Power supply
It must deliver at least 2A for each drive connected, with 1Vpp max ripple voltage.
It must be reserved to the drive supply only. In fact, the condivision with e.g. brakes, relais
etc. may generate electrical noises and or malfunctions.
Connection of an EMI filter (if required)
If the 230V mains connection is direct, the length of the wire connecting
LVD
and filter
must be no more than 50 cm to obtain the maximum efficiency.
If an autotransformer is utilised, the filter can be installed either up- or down-line; in this
latter case the cable utilised for the connection between autotransformer and
LVD
must be
screened.
Earth connections
The length of individual wires connected to earth must be kept as short as possible; it is
therefore advisable to use an earth busbar located as near as possible to the drive.