Operation Overview; Figure 1.1 Single Line Diagram - Normal Operation: Load Powered By Ups Inverter - Mitsubishi Electric 1100A Series Owner Technical Manual

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 UPS inverter.

Figure 1.1 Single Line Diagram - Normal Operation: Load powered by UPS inverter

CB
AC
input
User
supplied
MCCB
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.
WARNING : The Bypass input circuit breaker (MCCB) for protection
WARNING
1100A SERIES UPS
OWNERS / TECHNICAL MANUAL
UPS Module
CONVERTER /
CHARGER
52RC
72B
BATTERY
of the UPS and cables are field supplied and field
installed. (See WARNING 4 on page 1-7).
MITSUBISHI ELECTRIC 1100 SERIES UPS
52S
CB3
Static Transfer
Switch
INVERTER
52C
Power Flow
Not in Use
Built-in or external Battery
Page Number:
1-10
Output