MITSUBISHI ELECTRIC 2033C User Manual
Page 13
MITSUBISHI ELECTRIC 2033C SERIES UPS
MITSUBISHI
ELECTRIC
2033C SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
1-7
FIGURE 1.3 Single Line Diagram - Battery Operation
The UPS is equipped with an internal rotary type Maintenance Bypass Switch (MBS) that can be
used to divert utility power to the load during maintenance sessions. Figure 1.4 illustrates the power
path when the MBS is in the BYPASS mode.
FIGURE 1.4 Single Line Diagram - UPS on Maintenance Bypass Operation.
(7.5/10/15/20kVA)
The rotary maintenance bypass switch is shown as 52CS in Figure 1.4. 52CS is a two position
three point make-before-break transfer switch.
(30/40/50kVA)
Two contactors (52MB, 52L) are used instead of the 52CS. A rotary switch(SWM) is used for
control of the two contactors.
UPS Module
FB
BATTERY
CB2
CB3
Static Transfer
Switch
Power Flow
Not in Use
Output
52C
CB1
FI
FO
AC input
CB
User
supplied
CONVERTER
INVERTER
Maintenance
Bypass
Switch
40kVA, 50kVA:
External Battery
52CS(7.5-20kVA)
52MB&52L(30-50kVA)
UPS Module
FB
BATTERY
CB2
CB3
Static Transfer
Switch
Power Flow
Not in Use
52C
FO
CONVERTER
INVERTER
Output
AC input
CB
User
supplied
Maintenance
Bypass
Switch
CB1
FI
40kVA, 50kVA:
External Battery
52CS(7.5-20kVA)
52MB&52L(30-50kVA)