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3.3 PROCEDURE FOR CABLE CONNECTIONS
All hardware shall be accounted for during installation. Failure to account for
given hardware may void warranty.
CAUTION
1.
Identify the input/output power terminal blocks as shown in Figure 3.6.
2.
Connect the internal control wire and power wire.
(1) Control wire interconnections
1.
(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.
2.
CAUTION
3.
Connect the grounding conductor from the input service entrance to the UPS Grounding Bar
(E).
4.
Two (2) sources feeding the UPS:
(1) Connect the AC input power cables from the input service entrance to the AC input power
terminals, identified as A, B, C in Figure 3.6. Input cables shall be sized for an ampere
rating larger than the maximum input drawn by the converter. (Refer to equipment
nameplate for current ratings.) Confirm that an external bypass input circuit breaker
(MCCB) is installed (refer to WARNING 4, page 1-5). Connect the bypass input power
cables from the input service entrance to the bypass input power terminals, identified as
A40, B40 and C40 in Figures 3.6 to 3.7. Bypass input cables shall be sized for an ampere
rating larger than the maximum output current capacity of the UPS. Refer to Table 3.3 for
recommended cable sizes.
9900D SERIES UPS
OWNERS / TECHNICAL MANUAL
Battery CB ON Auxiliary to terminal TN11-14-21,22 of external I/F PCB
IOAU-19.
Positive cable to BP bus bar in UPS
Negative cable to BN bus bar in UPS
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.
MITSUBISHI ELECTRIC 9900D SERIES UPS
Page Number:
3-6
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