Mitsubishi Electric M9950 Series Technical Manual page 74

MITSUBISHI
ELECTRIC
3.5.2 Start-up / Shut-down (MMS with Individual Bypass Parallel Redundancy)
Parallel system of two UPS modules (MMS) with general configuration of Individual Parallel
Redundancy System is shown in FIGURE 3.9.
In MMS system, Internal switches must be kept the status as follows.
52PS：ON,52L：ON,52M：OFF
FIGURE 3.9 Circuit configuration of Individual Bypass Parallel Redundancy System
Maintenance Bypass Panel
52RS1
52RS2
Input Panel
52R1
52R2
Battery
Panel 1
The operation of system start in the status of "Load on maintenance bypass". (Confirm all of the
switches is opened or in tripping position besides 52MB.).
M9950 SERIES UPS
OWNERS / TECHNICAL MANUAL
52RC
72B1
52RC
72B2
Battery
Panel 2
MITSUBISHI ELECTRIC M9950 SERIES UPS
Page Number:
52M
BYP
SW
Parallel Panel
52PS
52L1
52C 52L
UPS 1
52M
BYP
SW
52PS
52L2
52C 52L
UPS 2
3-31
52MB
52XL