Installation
Load Connection
Load Wiring Length for Operation with Sense Lines For applications using remote sensing, you must limit the voltage drop across each load wire. Figure 2.3 shows some maximum allowable wire lengths for a given load current and wire size. We recommend that you use the larger load wiring to ensure a smaller voltage drop (1 V typical maximum), although units will compensate for up to 5 V drop in each line. See also “Local and Remote Sensing” on page 53.
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WIRE LENGTH (FEET)
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|
| WIRE GAUGE (AWG) | ||||
16 | 14 | 12 10 | 8 | 6 | 4 | 2 | 1 1/0 2/0 |
100
90
80
70
60
50
40
30
20
10
1 | 2 | 3 | 8 7 6 5 4 | 9 | 20 | 30 | 80 70 60 50 40 | 90 | 200 | 300 | 400 | 500 | 1000 |
10 | 100 |
LOAD CURRENT (AMPS)
Figure 2.3 Maximum Load Wire Length for 1 V Line Drop
Noise and Impedance Effects To minimize noise pickup or radiation, use shielded pair wiring of the shortest possible length for load wires. Connect the shield to the chassis via a rear panel mounting screw. Where shielding is impossible or impractical, simply twisting the wires together will offer some noise immunity. When using local sense connections, use the largest practical wire size to minimize the effects of load line impedance on the regulation of the supply.
Making Load
Connections
CAUTION
When making connections to the bus bars, ensure that each terminal's mounting hardware and wiring assembly are placed to avoid touching the other terminal and shorting the power supply output. Heavy connecting cables must have some form of strain relief to avoid loosening the connections or bending the bus bars.
Make load connections at the rear of the power supply at the positive and negative output bus bars or to the
46 | Operating Manual for XFR 2.8kW Series Power Supply |
