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Troubleshooting During Power-Up
1-3
AC Input Box
Each system and expander cabinet has an AC input box. It provides the
interface to the AC utility power via a three-phase, five-wire connector
with attached power cord. The AC input box also contains the main input
circuit breaker and fuses, and a power line monitoring port.
DC Distribution Box
Each system and expander cabinet has a DC distribution box. It provides
the interconnect for the AC input box and power regulators. It also func-
tions as the:
•
Distribution point for 48 VDC system power
•
Battery pack interface to the power regulators
•
Signal interconnect from the CCL module to the power regulators
Power Regulators
Each system and expander cabinet has three power regulators operating in
parallel, two units required for the load and the third used as a backup
unit. Each power regulator provides the following:
•
48 VDC output
•
LPS OK <A:C>L signal
•
Power system status via serial data lines
•
Non-switched 48 VDC power to the CCL module
•
Status indicators for fault isolation
•
Battery charging and monitoring circuitry
•
Battery backup converter
Battery Plug-In Units (PIUs)
Battery PIUs are contained in the bottom of the system cabinet and in the
battery cabinet(s). Battery PIUs provide uninterrupted power in the event
of a power failure. The combination of two battery PIUs in a system or
battery cabinet provides backup for the cabinet’s three regulators, labeled
A, B, and C. Eight batteries support each regulator.
For more information:
Platform Service Manual
Содержание VAX 10000
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