AMETEK PLA-PLW - Manual (Page 45)

AC INPUT CONNECTOR AND VOLTAGE SELECTION
To prevent damage to the electronic load, turn off AC power to the unit before changing from one AC input voltage range
to another. Example 115Vac to 230Vac.
eLOAD series has an auto range selection function. This function allows you to connect to either low or high AC input
voltage without making any adjustment to the unit.
AC INPUT CORD
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The AC input cord is the disconnect device for the electronic load. The plug must be readily identifiable to the operator.
The input cord must be no longer than 3 m (9.84 feet).
The AC input cord we recommend is specified in Table 2.3, “AC Cord Specification”.
If you require a special cord, call our sales representative.
TABLE 2.3 AC CORD SPECIFICATION
WIRE SIZE
TYPE OF CONDUCTOR RATINGS LENGTH (feet)
DIMENSIONS AWG
16/3 SJT 105 qC 6
18/3 SJT 105 qC 6
LOAD WIRING
To select wiring for connecting the load to the electronic load, consider the following factors:
x Insulation rating of the wire
x Current carrying capacity of the wire
x Maximum load wiring length for operation with sense lines
x Noise and impedance effects of the load lines
CURRENT CARRYING CAPACITY: 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. Table 2.4
shows the maximum current rating, based on 450 A/cm², for various gauges of wire rate for 105
qC operations. Operate at
the maximum current rating results in an approximately 30 qC 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, use larger gauges or
wiring rated for higher temperature.
TABLE 2.4 CURRENT CARRYING CAPACITY FOR LOAD WIRING
WIRE SIZE (AWG) MAXIMUM CURRENT (A)
2/0 303
1/0 247
1 192
2 155
4 97
6 61
8 36
10 21
12 16
14 10
WARNING
CAUTION
2-5