American Power Conversion 250 A - Manual (Page 44)

ATS/Voltage
34 InfraStruXure Power Generation System
S2-Generator
One of the following is displayed to describe the condition of the input from Source 2.
OK Source 2 is acceptable, as defined in the Transfer Points menu (the generator is
running).
OFF The generator is not running.
BAD Source 2 is not acceptable, as defined in the Transfer Points menu, even though the ATS
is commanding the generator to run.
Press E NTER when the selector arrow rests at the S2-Generator item to display the following:
L1-2, L2-3, L3-1 The Source 2 line-to-line input voltage.
L1, L2, L3 The Source 2 line-to-neutral input voltage. These readings are only displayed on Wye
systems.
Frequency The frequency of the Source 2 input, in hertz (Hz).
Qual Describes the quality of the input from Source 2. One of the following conditions is
displayed:
• Source Good: The source is acceptable, as defined in the Transfer Points menu.
• Low Voltage: The input voltage is below the configured Low voltage Transfer Point
on one or more of the phases.
• High Voltage: The input voltage exceeds the configured High voltage Transfer Point
on one or more of the phases.
• Phase Imbalance: The percent voltage difference between two phases, as defined by
the Phase Balance setting in the Transfer Points menu, has been exceeded.
• Freq Range: The frequency is outside the configured Freq range, as defined in the
Transfer Points menu.
• Bad Rotation: The phase rotation does not match the configured Phase Sequence, as
defined in the Transfer Points menu.
Phase Sequence Lists the phase rotation (e.g., A-B-C) of the Source 2 input.