Installation and Operation Sorensen DCS Series 1kW and 1.2kW Supplies
2-8 M362500-01 Rev K
2.6 Standard Operation
Reliable performance of the DCS power supply can be obtained if certain basic precautions are
taken when connecting it for use on the lab bench or installing it in a system.
To obtain a stable, low noise output, careful attention should be paid to factors such as
conductor ratings, system grounding techniques and the way in which the load and remote
sensing connections are made.
2.6.1 Load Conductor Ratings
Table 2–1 lists the maximum allowable load wiring length (in feet) for a specified wire gauge and
power supply model operating at full rated output. The lengths indicated are based on PVC
insulated wire with a maximum operating temperature of 105°C. To overcome impedance and
coupling effects, which can degrade the power supply performance, use leads of the largest
gauge and shortest length possible.
Wire Size (AWG)
Model 2 4 6 8 10 12 14 16 18
8V 19 12 – – – – – – –
10V 19 12 – – – – – – –
20V 30 30 30 23 – – – – –
33V 30 30 30 30 22 14 – – –
40V 30 30 30 30 30 18 – – –
50V 30 30 30 30 30 23 13 – –
60V 30 30 30 30 30 26 16 10 –
80V 30 30 30 30 30 30 22 20 –
100V 30 30 30 30 30 30 22 20 –
150V 30 30 30 30 30 30 28 26 –
300V 30 30 30 30 30 30 30 30 –
600V 30 30 30 30 30 30 30 30 30
Table 2–1 Wire Size and Length
2.6.2 Load Connection and Grounding
Proper connection of distributed loads is an important aspect of power supply application. A
common mistake is to connect leads from the power supply to one load, from that load to the
next load, and so on for each load in the system. In this parallel power distribution method,
the voltage at each load depends on the current drawn by the other loads and DC ground loops
are developed. Except for low current applications, this method should not be used.
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