Procedure For Cable Connections - Mitsubishi Electric M9950 Series Technical Manual

MITSUBISHI
ELECTRIC

3.3 PROCEDURE FOR CABLE CONNECTIONS *

1. Confirm the capacity of the UPS being installed. Identify the input/output power
terminal blocks as shown in the appropriate FIGUREs 3.1 through 3.4.
2. Connect the internal control wire and power wire.
(1) Control wire Inter-connect
1.
2.
(2) Selection of one (1) source or two (2) sources feeding the UPS.
When two (2) sources feeding the UPS is selected, remove Jumper BUS Bars
between AC and Bypass Input (Fig. 3.4).
(3) Control wire Inter-connect
1.
2.
(4) Power wire (AC input, Bypass input, AC output) Inter-connect
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
4. X4 (Neutral) to N bus bar in UPS
b.) DC Input to UPS
1.
2.
CAUTION :
!
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
NOTE
Bypass Input power terminals A40, B40 and C40 are correct.
The proper phase rotation is clockwise A(R)
→ B(S) → C(T).
3. Connect the grounding conductor from the input service
entrance to the UPS Ground Bar (E).
M9950 SERIES UPS
OWNERS / TECHNICAL MANUAL
72B UVT to terminal TN1-1, 2 of external I/F PCB IOAU-09.
72B ON Auxiliary to terminal TN1- 3, 4 of external I/F PCB IOAU-09.
72B UVT to terminal TN1-1, 2 of external I/F PCB IOAU-09.
72B ON Auxiliary to terminal TN1- 3, 4 of external I/F PCB IOAU-09.
Positive cable to BP bus bar in UPS
Negative cable to BN bus bar in UPS
After the completion of the input power cables
MITSUBISHI ELECTRIC M9950 SERIES UPS
Page Number:
3-3
MANDATORY