AMETEK Ls Series - Manual (Page 43)

User Manual Lx / Ls Series
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always required for single-phase output mode on a 9000Ls/2 and may be used if needed for the
EUT for all three-phase output modes.
The external sense inputs allow the power system output voltages to be monitored directly at the
load and must be connected at external sense connector. The external sense wires should be
run as a twisted pair for short lengths. Sense leads over three (3) feet long should be run as a
twisted shielded pair.
Note: The output of the power source is isolated from the input line and floating with
respect to chassis ground. If needed, either side (HI or LO) may be grounded.
The output power cables must be large enough to prevent a total voltage drop exceeding 1% of
the rated output voltage between the power source and the load. Note that wires must be sized
to accommodate the maximum current that is available. This may be a function of the voltage
range and phase mode of the Lx \ Ls model on hand. Always use the current available on the low
voltage range to size the wires.
Cable lengths must not exceed twenty-five (25) feet. For lengths greater than 25 feet, calculate
the voltage drop from the following formula:
2 X DISTANCE X CABLE RESISTANCE PER FT. X CURRENT = VOLT DROP
Note: Ensure that output cable lengths from Master and Auxiliary chassis to EUT are of
identical length.