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Figure 44
DC-power equipment in the rear of the pedestal – NT4N49AA PDU
BLO CB0 CB1
The following equipment is located in the rear of each pedestal (see
Figure 44) in Large System columns.
•
The PDU distributes power to the entire column.
•
The field wiring terminal provides the connection point for wiring
brought into the pedestal.
•
A circuit breaker is provided for each module in the column and for the
blower unit.
•
All column circuit breakers will trip if a column thermal overload is
detected or a DC power low-voltage condition is sensed.
•
The system monitor checks the column temperature, cooling system
status, and system voltage status and controls alarms and line transfer
states accordingly.
J3
J5
J6
EACH INPUT CIRCUIT MUST BE PROVIDED WITH A
LISTED FUSE OR CIRCUIT BREAKER SUITABLE FOR
BRANCH CIRCUIT PROTECTION, RATED 30A.
Installing DC power
J4
+
+
LRTN
553-8997
Large System Installation and Commissioning
Page 125 of 436
FLTR / PWR DIST
UNIT ASSY
CB2 CB3
553-8997
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