SECTION I
Theory of Operation
Page 1.3
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1.5 Batteries (continued)
The rectifier/charger normally provides a maintaining or “float” charge to
the batteries. Following periods of discharge when the batteries have supplied
power to the inverter, the rectifier/charger increases power to the batteries in order
to recharge them.
1.6 Control Logic and Control Circuitry
The control logic and circuitry of the UPS provide the operating logic and
system control for all functions ranging from limiting the rectifier/charger inrush
current by “walking” it in, to maintaining the inverter output voltage within rigid
specifications, to determining whether or not the static bypass switch should be
activated. The control logic is, for all practical purposes, the brain of the UPS.
1.7 Digital Monitoring Panel
The UPS is equipped with a standard Digital Monitoring Panel which
selectively monitors critical parameters of the UPS, using bright, easy-to-read
digital LED displays. In addition, detailed instructions guide the operator through
the UPS startup sequences. An alarm history can be called up on these digital
displays when desired.
In the event of an abnormal condition, an audible alarm sounds and the
corresponding red LED illuminates to identify the condition so that corrective
action can be taken. Alarm Silence and Emergency Power Off pushbuttons are
provided.
This panel is discussed in greater detail in Section III.
