MITSUBISHI ELECTRIC 2033C - Manual (Page 11)

MITSUBISHI ELECTRIC 2033C SERIES UPS
MITSUBISHI
ELECTRIC 2033C SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
1-5
1.3 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.
FIGURE 1.1 Single Line Diagram - Normal Operation. Load powered by inverter.
During normal operation, the path through the inverter 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.
* The Input circuit breaker(MCCB) for protection of the UPS and cables are field supplied and field
installed. (See WARNING 2 in section 1.0).
UPS Module
Static Transfer
Switch
Power Flow
Not in Use
AC input
CB
FB
CB2
CB3
CONVERTER INVERTER
Output
52C CB1 FI FO
BATTERY
User
supplied 52CS(7.5-20kVA)
52MB&52L(30-50kVA)
Maintenance
Bypass
Switch
40kVA, 50kVA:
External Battery