363-205-401
Power Up:
Issue 7, March 1997
Page 1 of 6
DLP-527
Install and Test Power Units in Rectifier Shelf
SUMMARY: Install CS787B540 power units. Connect AC input and turn on AC
power. On power units, measure float voltage. Requirement: between
−
54.3 V DC
and
−
54.7 V DC. Connect output and control cables to power units. Requirement:
NORMAL indicator lighted on control & distribution panel. Measure power unit output
voltage. Requirement: between
−
54.3 V DC and
−
54.7 V DC. On control &
distribution panel, turn on CB( ) circuit breaker(s) for systems to be installed.
1.
On AC power panel, verify that AC power CB1 (utility) circuit breaker is off and
CB6, CB7, and CB8 circuit breakers for R1, R2, and R3 feeders to rectifier
shelf are also off [Figure 1].
2.
Release cover from front of rectifier shelf.
3.
Get CS787B540 power unit (48 V DC, 25A OLS rectifier) and inspect for dam-
age.
4.
On rectifier shelf, set power unit in RECTIFIER 1, RECTIFIER 2, or RECTI-
FIER 3, position for power unit being installed [Figure 2]. Connect P905-( )
(P905-1, P905-2, or P905-3) AC input cable to J905/V IN connector on power
unit [Figure 3].
Comment:
These power units have no backplane connector. Power and
control cables plug in to connectors on right-hand side of
power unit.
