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13
431M - MBS Cabinet Installation Guide
5
1
2
6
14
431M - Door Closed
13.1
431M Maintenance Bypass Switch (MBS) Options
(All cabinets are O'Brien Black (Textured))
MBS Cabinet
UPS
Part Number*
Capacity
431M-
300 – 30 kVA
500 – 50 kVA
Example: 431M500-F3MS is a floor-mount, 50kVA, 208/120V, Maintenance Bypass Switch with Slide-bar
Mechanical Interlock.
Figure 13-1 and Figure 13-2 show the external and internal components of the 431M.
50
No.
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
3
4
(4 per Side)
9
MBS Bus Stubs
10
Interlock Plate
11
CB1
12
CB2
13
CB3
14
Forklift Access
Figure 13-1 - 431M Parts
Operating Voltage
# of
Brkers
-F – 208/120 V
3
4300 Series Ancillary Cabinets Installation and Operation Manual
Part
2
11
12
13
Identification
431M - Door Open
(Dead Fronts Removed)
Safety Interlock
MS – Mechanical Interlock (Slide Bar) with Sole-
noid Release Unit. (Note: The solenoid locks the
slide bar in
5
8
9
10
8
9
6
7
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