NF DP420LS Instruction Manual page 179

4. Advanced Operation
3. To unbalance the phase, set the phase in the [L1-L2] and [L1-L3] items. When the setting is
completed, close the window.
4. To unbalance the phase voltage, press the [Osc] soft-key and select [5: Target Phs], and then
select the phase to set the phase voltage. Or perform the Shortcut operation
switch the phase to set. Set the phase voltage in [ACV].
-------- Notes ------------------------------------------------------------------------------------------------------------
 When the unbalanced mode is switched to the balanced mode, the AC voltage of each phase
becomes equal to the setting value of the L1 phase. The phase setting value is the value of the
balanced mode (180 degrees for single-phase three-wire output, and 120 degrees and 240
degrees for three-phase output).
 Switching between the unbalanced mode and balanced mode is possible even in the output on
state.
 Depending on combined condition of the phase angle setting and load, an error message (ID:
53 Power Unit DCPS Overvoltage) may be displayed and the output may be turned off.
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160 PROGRAMMABLE AC POWER SOURCE
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