MITSUBISHI ELECTRIC 9900CX SERIES UPS
9900CX SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
3-2
D) External Battery Supply
Please refer to the following when installing and maintaining batteries:
1. The customer shall refer to the battery manufacturer's installation manual for
battery installation and maintenance instructions.
2. The maximum permitted fault current from the remote battery supply, and the DC
voltage rating of the battery supply over-current protective device are shown in
Table 3.3.
Table 3.3
Maximum Permitted Fault Current
UPS Capacity
(kVA)
DC Voltage
Rating (V)
Maximum Fault
Current Permitted (A)
1050 480 25,000
1400 480 25,000
1750 480 25,000
2100 480 25,000
3.3 PROCEDURE FOR CABLE CONNECTIONS
1. Identify the input/output power terminal blocks as shown in Figure 3.1.
2. Connect the internal control wire and power wire.
(1) Control wire interconnections
1. Battery CB ON Auxiliary to terminal TN11-14-21,22 of external I/F PCB
IOAU-19.
(2) Power wire (AC input, Bypass input, AC output) interconnections
a.) From user’s distribution panel
1. X1 (A-phase) to A bus bar in UPS
2. X2 (B-phase) to B bus bar in UPS
3. X3 (C-phase) to C bus bar in UPS
b.) DC Input to UPS
1. Positive cable to BP bus bar in UPS
2. Negative cable to BN bus bar in UPS
CAUTION :
After the completion of the input power cables connection:
With a phase rotation meter, check that the phase rotation of the
AC Input power terminals A, B and C as well as the Bypass Input
power terminals A40, B40 and C40 are correct. The proper phase
rotation is clockwise
A B C.
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