Ametek Sorensen DC Series, Руководство по эксплуатации

Страница: 34 / 94

Installation Sorensen DCS-E Series 3kW Supplies
2-10 M362295-01 Rev D
2.7 LOAD CONNECTION
This section provides recommendations for load wiring and connecting as they apply to both
single and multiple load configurations.
2.7.1 Load Wiring
When connecting load wiring to the power supply, you must consider the following factors:
•
the current carrying capacity of the wire,
•
the maximum load wiring length for operation with sense lines, and
•
noise and impedance effects of the load lines.
C
URRENT
C
ARRYING
C
APACITY
As a minimum, load wiring must have a current capacity greater than the output current rating
of the power supply. This ensures that the wiring will not be damaged even if the load is
shorted.
The table below shows the maximum current rating, based on 450 amps per square centimeter,
for various gauges of wire rated for 105°C operation. Operation at the maximum current rating
results in approximately a 30-degree temperature rise for a wire operating in free air. Where
load wiring must operate in areas with elevated ambient temperatures or bundled with other
wiring, larger gauges or higher temperature-rated wiring should be used.
AWG Maximum Current AWG Maximum Current
16 7 4 106
14 11 2 170
12 18 1 209
10 23 1/0 270
8 39 2/0 330
6 67 3/0 350
L
OAD
W
IRING
L
ENGTH FOR
O
PERATION WITH
S
ENSE
L
INES
For applications using remote sensing, the voltage drop across each load line must be limited to
1V or less. Figure 2-8 shows the maximum allowable wire length that may be used for a given
load current and wire size to ensure that this limit is not exceeded.