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4300 Series Ancillary Cabinets Installation and Operation Manual
13 431M - MBS Cabinet Installation Guide
No. Part
1 Toshiba Label
2 UPS On-Line Indicator
3 Door Latch
4 Door Lock-Out/Tag-Out
Hasp
5 Top Cable Access
Plate
6 Side Cable Access
Plates
7 Bottom Cable Access
Plate (Not Shown)
8 Cabinet Mate-up Points
(4 per Side)
9 MBS Bus Stubs
10 Interlock Plate
11 CB1
12 CB2
13 CB3
14 Forklift Access
13.1 431M Maintenance Bypass Switch (MBS) Options
(All cabinets are O’Brien Black (Textured))
MBS Cabinet
Part Number*
UPS
Capacity
Operating Voltage # of
Brkers
Safety Interlock
431M- 300 – 30 kVA
500 – 50 kVA
-F – 208/120 V 3 MS – Mechanical Interlock (Slide Bar) with Sole-
noid Release Unit. (Note: The solenoid locks the
slide bar in
Example: 431M500-F3MS isaoor-mount,50kVA,208/120V,MaintenanceBypassSwitchwithSlide-bar
Mechanical Interlock.
Figure 13-1 and Figure 13-2 show the external and internal components of the 431M.
431M - Door Closed 431M - Door Open
(Dead Fronts Removed)
7
4
6
5
3
8
10
2
11
12
9
5
6
6
1
8
9
13
14
Figure 13-1 - 431M Parts
Identication
2