Installing DC power Page 121 of 456
The following equipment is located in the rear of each pedestal (see
Figure 43) 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.
Figure 43
DC-power equipment in the rear of the pedestal – NT4N49AA PDU
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FLTR / PWR DIST
UNIT ASSY
+ + LRTN
EACH INPUT CIRCUIT MUST BE PROVIDED WITH A
LISTED FUSE OR CIRCUIT BREAKER SUITABLE FOR
BRANCH CIRCUIT PROTECTION, RATED 30A.
BLO CB0 CB1
CB2 CB3
Communication Server 1000M and Meridian 1 Large System Installation and Commissioning
