MGE UPS Systems 40-150kVA - Manual (Page 33)

Operation
3.0 Scope
Important information on the Comet 40-150kVA systems’ operation procedure sequences; for normal, on battery,
and bypass operation, with descriptions of the control and display indicators.
3.1 Power Flow
3.1.1 Power Flow, For Normal Operation
During normal operation the AC input source supplies the Rectifier, which converts the incoming AC power to
DC. The rectifier in turn supplies the Inverter, which converts DC power to AC to supply the attached load (see
Figure 3-1).
Figure 3-1: Power Flow, For Normal Operation.
3.1.2 Power Flow, For On Battery Operation
When AC input power fails, the UPS goes to on-battery operation. DC power is supplied from the UPS battery
system to the inverter, which converts battery power (DC) to AC power to supply the attached load (see Figure
3-2).
Figure 3-2: Power Flow, For On Battery Operation.
3 —1 86-160310-00 E00 Operation
INVERTER
BYPASS
INPUT
(OPTIONAL)
MAIN
INPUT
BATTERY
RECTIFIER
TO LOAD
STATIC SWITCH
INVERTER
BYPASS
INPUT
(OPTIONAL)
MAIN
INPUT
BATTERY
RECTIFIER
TO LOAD
STATIC SWITCH