MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
1-8
1.4 OPERATION OVERVIEW
The UPS provides two power paths between the utility source and the critical load.
Figure 1.1 shows the path for normal operation, with the load powered from the inverter. Figure
1.2 shows the path for bypass operation, with the load supplied through the static bypass line.
A) Normal
operation:
Load power supplied by each system UPS inverter.
Figure 1.1
Single Line Diagram - Normal Operation: Load powered by UPS inverter
During normal operation, the path through the UPS inverters is used to power the load.
Referring to Figure 1.1: Input AC power is converted to DC by the Converter. DC power is
utilized to charge the UPS battery and to provide power to the Inverter. The Inverter converts
the DC power to clean AC power to supply the critical load.
The conversion - inversion process eliminates any voltage transients or fluctuations existing in
the input power before it reaches the critical load.
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Bypass Module
CB3
CONVERTER / INVERTER
CHARGER
52C
Static Transfer
Switch
52S
CB1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52C
CB1
CB2
UPS Module
UPS
CABINET
AC
input
Battery
Cabinet
Bypass
Input
CB
Output
supplied
MCCB
User
supplied
MCCB
CB
External
BATTERY
Power Flow
Not in Use
Output
CB
3
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6 UPS
modules
Содержание 9900C Series
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