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4300 Series Ancillary Cabinets Installation and Operation Manual
12.7 Join the 431A Cabinet with the 431M
The Toshiba Auxiliary Cabinet (431A) is equipped with four 14 mm mating holes located on the front and back of
the left and right sides of the cabinet.
DANGER: HAZARDOUS VOLTAGES MAY EXIST.
Verify all power is removed from the UPS and power cables prior connecting the power cables to the Auxil-
iary Cabinet terminals, Maintenance Bypass Switch terminals, or UPS terminals.
1. Remove the top and bottom 431M Front panels.
2. Remove the cable access plate at the lower-front right side of the 431A Cabinet.
3. Remove the cable access plate at the lower-front left side of the 431M Cabinet.
4. Position the 431A cabinet to the left of and adjacent to the 431M Cabinet.
5. Align the four 16 mm bolt holes on the right side of the 431A Cabinet with the matching four 16 mm bolt holes
on the left side of the 431M Cabinet.
6. Bolt the cabinets together with four 3/8-16 in. x 2 in. long bolts.
7. Secure the 431A base anchor bolts.
8. Select the power cables per Tables 12-1, 12-2, and 12-3.
• Cable size for the UTILITY and LOAD terminals depend on the transformers Input/Output Voltages.
• The UPS Input/Output cables will be the same size: 3Phase /4Wire 208/120V.
9. Run power cables from 431M bus stub terminals UTILITY IN to 431A TB1 - UPS IN terminals. (Fig. 12-7)
10. Run power cables from 431M bus stub terminals LOAD IN to 431A TB2 - UPS OUT terminals. (Fig. 12-7)
11. Run the appropriately sized power cables from 431A TB1 to the 431M From UTILITY (Figure 12-2 #9A), and
431A TB2 From UPS OUT (Figure 12-2 #9D), bus stubs per Figure 7.
12. Connect 431M UPS IN Bus Terminals (Figure 12-2 #9B) to UPS TB1 - UPS IN, per Figure 12-7.
13. Connect 431M UPS OUT Bus Termnals (Figure 12-2 #9C) to UPS TB1 - UPS OUT, per Figure 12-7.
14. Connect the Neutral cables to the 431M Neutral Bus stub, Figure 12-2 #16 and Figure 12-7.
15. Connect the Mechanical Interlock Solenoid power plug, TB1 P-1(Figure 12-2 #18) to the UPS 24V power
terminal jack J1 in the UPS .
16. Connect the Ground wires (#2 AWG or better) to the ground bus, Figure 12-2 #17.
17. Verify the connections are correct.
18. Install the 431M top and bottom Dead Fronts.
Figure 12-7 - Power Cabling Between Auxiliary Cabinet, MBS, and UPS
11-
1
431A
Utility Power
L1
L2
L3
N
(Optional)
Critical Load
N
L1
L2
L3
(Optional)
TB1
(To UPS IN)
(From Utility)
TB2
(From UPS OUT)
(To LOAD)
H1 H2 H3 N N L1 L2 L3
H1 H2 H3 N N L1 L2 L3
431M
NEUTRAL
N N N N
UPS OUT UPS IN
A
B
C
A
B
C
UTILITY
IN
LOAD IN
A
B
C
A
B
C
4300 Series
UPS
TB1
H1
H2
H3
N
N
L1
L2
L3
(UPS OUT) (UPS IN)
+
-
24V DC
PCB
P1
J1
CNEPO-1
CNEPO-2
TB1
1 2 3 4 5 6 7 8