Battery Parameters - Alpha Technologies CFR 600 Operator's Manual

5. RS-232 TERMINAL COMMUNICATION

5.8 Battery Parameters

"BATTERY PARAMETERS" provides UPS Battery Voltage, Charger
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Current, and Charger Status information.
Voltage
Voltage indicates the average DC voltage of UPS batteries. When the
UPS is running in "LINE PRESENT" mode and the batteries are charged, the
voltage will be approximately 27.6 VDC (equal to the charger's "FLOAT"
charge). When the UPS is running in "LINE FAILURE" mode, the battery
voltage will slowly decrease until the Battery Low Voltage Cutout is reached
(approximately 21.0 VDC). Once utility power is restored, after a prolonged
power outage, the battery voltage will slowly climb until the batteries are
recharged. Note: If external batteries are connected, their voltage will be
reflected as well.
Battery Current
When the UPS is running in "LINE PRESENT" mode, the average DC
charger current is displayed (i.e., 2.1 Amps). When the UPS is running in
"INVERTER" mode the battery charge current is zero (0).
Charger Status
When the UPS is in "LINE PRESENT" mode, the charger keeps the
batteries charged, indicated by "CHARGER STATUS ON". When the UPS is
in "LINE FAILURE" mode and running on the batteries, the charger immedi-
ately switches OFF, indicated by the display "CHARGER STATUS OFF".
Once utility power returns, or an alternative power source (generator) is
connected, the charger will switch ON and the DC current will slowly rise after
an initial 3 second "soft start" delay.
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