Cross-Sections Of The Power Cables And Sizes Of The Protective Devices - Santerno DCREG2 Series User Manual

DCREG2
DCREG4
3.27 CROSS-SECTIONS OF THE POWER CABLES AND SIZES
OF THE PROTECTIVE DEVICES
The minimum requirements of the power cables and the protective devices needed to protect the
system against short-circuits are given in the tables below. It is however recommended that the applicable
regulations in force be observed; also check if voltage drops occur for cable links longer than 100 m.
For the largest sizes of DCREG, special links with multiple conductors are provided for each
phase. For example, 2x120 in the column relating to the cable cross-section means that two 120 mm
parallel conductors are required for each phase.
Multiple conductors shall have the same length and must run parallel to each other, thus ensuring
even current delivery at any frequency value. Paths having the same length but a different shape deliver
uneven current at high frequency.
Also, do not exceed the screw torque for the terminals to the bar connections. For connections to
bars, the screw torque relates to the bolt tightening the cable lug to the copper bar. The cross-section
values given in the tables below apply to copper cables.
The links between the motor and the DCREG drive must have the same length and must follow
the same paths.
DCREG2
DCREG4
Model
.10
.20
.40
.70
1 .100 M8
.150
.180
.250
.350
.410
.500
2 M10
.600
.900
2A .1200 M12
CAUTION
CAUTION
NOTE
Cable Cross-section to
AC and DC Side
mm
Nm / lb/in
(AWG/kcmils)
2.5 (12AWG)
4 (10AWG)
10 (6AWG)
25 (4AWG)
16 / 142 50 (1/0AWG)
70 (2/0AWG)
95 (4/0AWG)
120 (250kcmils)
2x120 (2x250kcmils)
2x120 (2x250kcmils)
2x185 (2x350kcmils)
25 / 221
2x240 (2x500kcmils)
3x240 (3x500kcmils)
40 / 354 4x240 (4x500kcmils)
Always use the correct cable cross-sections and activate the protective
devices provided for DCREG. Failure to do so will cause the non-
compliance to standard regulations of the system where the DCREG is
installed.
Additional UL requirements: for the North American market, a 600 Vac
cable is accepted for up to 500 Vac. A 1000 Vac cable is required above
500 Vac (below 600 Vac).
The power cables must be rated for 75 °C (167 °F).
For details on wiring and safety devices for a DCREG MODULAR.S please
contact Elettronica Santerno.
Ultrafast fuses
AC Side
2
A
See RATINGS
tables
15P0059B3
USER MANUAL
Ultrafast fuses
AC1
DC Side
Contactor
AC Side
A
A (model)
See RATINGS 25 (AF09)
tables
25 (AF09)
50 (AF30)
100 (AF52)
125 (AF80)
200 (AF140)
225 (AF146)
275 (AF190)
400 (AF265)
500 (AF305)
600 (AF400)
700 (AF460)
1050 (AF750)
1650 (AF1650)
61/200
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