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ATS/Voltage
InfraStruXure Power Generation System 35
ATS Setup
Press ENTER when the selector arrow rests at the ATS Setup item to change the following settings:
Transfer Points The voltage-sensing point at which you would transfer to the other source, based on
voltage and frequency.
• S1-Utility: The input voltage reading for Source 1.
• Low: The low voltage limit that causes the ATS to switch from Source 1 to Source 2.
Press
ENTER to change this setting.
• High: The high voltage limit that causes the ATS to switch from Source 1 to Source 2.
Press
ENTER to change this setting.
• Other Settings: The settings on this screen determine when the source is OK, and
define the quality of the source. Press
ENTER when the selector arrow rests at this item
to change the following settings or thresholds:
–Freq: The frequency cannot vary beyond this configured range (+/– x.xx Hz).
–Phase Balance: The percent voltage difference between two phases cannot exceed
this configured setting (%).
–Phase Sequence: The phase rotation (default is A-B-C) must match this configured
setting.
Transfer Setup The following settings can be changed in this menu:
• Open Xfers: Defines how long BOTH the Source 1 and Source 2 switches will be OFF
(open) during an open transfer (see page 8 for a definition of open transfers).
• Allow Closed: Enables/disables closed transfers (see page 8 for a definition of closed
transfers).
• Max Sync: The maximum time allotted for the ATS to attempt a closed transfer before
it performs an open transfer.
• ATS Delay Settings: The time delay settings that affect transfers and retransfers.
–Gen Start: The amount of time allotted between when the generator receives a start
signal and when the generator starts (default is 0).
–Line Stable: If the ATS switches to Source 2 after a failure in Source 1, and Source 1
is restored, the Line Stable setting is the amount of time (in seconds) allotted for
Source 1 to become acceptable before the ATS returns to it (default is 3 minutes).
–Min on Gen: The minimum time the generator must run before the ATS retransfers to
utility (default is 15 minutes).