Lucent Technologies Lineage
®
2000 25A Ferroresonant Rectifier J85502A-1
5 - 2 Installation
Issue 4 May 1998
Bay Mounting
J85502A-1 rectifiers that are shipped as part of a battery plant
are installed in the battery plant racks before shipment.
Rectifiers ordered as individual units are shipped in individual
containers.
The rectifiers mount in Lucent Technologies 26-inch wide bays,
with 24-5/16 inch mounting centers. The bays have drilled holes
on 1-inch centers, in the vertical plane, to accommodate #12-24
threads per inch self-tapping screws. Any restriction on the
location in the bays is described in the documentation for the
specific power plant.
A supplementary bay that contains ONLY rectifiers should be
located so that the backs of the rectifiers are at least three inches
from any wall.
Heat Dissipation
Heat dissipated to the environment is another factor in selecting
a location for the J85502A-1. The maximum heat exhausted by
each rectifier is approximately 420 BTU/hr (24-volt rectifier) or
810 BTU/hr (48-volt rectifier). The rectifiers use free convective
cooling, where air enters the cabinet through perforations in the
bottom of the rectifier and escapes through perforations in the
top cover. A minimum of 7 inches in front of the rectifier must
be free of obstruction to allow the door to open horizontally and
provide for adequate ventilation.
AC Input Power
The customer is responsible for providing ac power to the
rectifier. Table 5-A provides requirements for the ac power
installation. Separate branch circuits must be provided to each
rectifier to assure reliability of the system. The wiring method
should meet national and local codes. If the codes governing the
installation allow it, Armored Cable (AC), also known at BX,
makes routing the ac wiring within the bay easier.
Figure 5-1 shows the ac input conduit hole. Figure 5-2 shows
termination points for the ac input wires. The “green wire” is the
AC equipment ground (AC EG), also known as frame ground
(FR GRD). Its termination point is on the left wall of the
rectifier near the ac input conduit hole.
Caution
Do not block rectifier ventilation openings or damage may
result due to overheating.