Toshiba 431A User Manual
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4300 Series Ancillary Cabinets Installation and Operation Manual
10 431A - Toshiba Auxiliary Cabinet
The 431A Toshiba Auxiliary Cabinet is available in three basic configurations:
• Two Transformers
• One Transformer and a 12 pole PDP
• Maintenance Bypass Panel (MBS) and a 12 pole PDP
NOTE: Units with PDP ship with the 12-pole Breaker Box Unpopulated. The customer is responsible for
supplying the circuit breakers for the PDP.
Figure 9-3 -
431A Auxiliary Transformer Cabinet Configuration Options
Figure 9-3a - 431A Auxiliary Cabinet with two transformers
AC Input
3Φ-3W 0r
3Φ-4W
Output
3Φ-3W or
3Φ-4W
Output
Trans-
former
T2
T1
Input
Trans-
former
(208V
Wye)
(208V
Wye)
4300 UPS
UPS
IN
UPS
OUT
431A
AC Input
3Φ-3W 0r
3Φ-4W
T1
UPS Input
Isolation
CB1
Maintenance Bypass Switch
CB2
UPS
Output
Isolation
CB3
4300 UPS
UPS
IN
UPS
OUT
431A
Output
3Φ-3W or
3Φ-4W
PDP
Figure 9-3c - 431A Auxiliary Cabinet with MBS and PDP
AC Input
3Φ-3W 0r
3Φ-4W
Output
3Φ-3W or
3Φ-4W
PDP
T1
Input
Trans-
former
(208V
Wye)
4300 UPS
UPS
IN
UPS
OUT
431A
Figure 9-3b - 431A Auxiliary Cabinet with one transformer and PDP