Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
Issue 13 December 2000 Product Description 2 - 5
Configurations
Introduction The -48V CPS provides the facilities to combine rectifiers, converters,
ringing generators, monitor and control units, a low-voltage battery
disconnect feature, battery protection circuits, and input and output
distribution in a single shelf. The -48V CPS is available in four
configurations, which are described below.
Rectifier Plant The rectifier plant is capable of providing -48V power within the load
range of zero to 75 amperes in a one-shelf plant or zero to 150 amperes
in a two-shelf plant.
Rectifier/Ringer
Plant
The rectifier/ringer plant has -48V rectifiers that can provide load
power and power to operate 50/100VA ringers. Up to two ringers may
be installed in a single-shelf plant to provide redundant ringing power.
Additional ringing power may be obtained in two-shelf plants that can
support two ringers per shelf. The rectifiers provide input power for
ringers whose output is available on the secondary output bus through
connector J14 on the CPS shelf. The ringing plant design permits on-line
redundant ringing capacity of 50VA in a single-shelf plant or 100VA in
a two-shelf plant with ES620 or ES620B ringers. ES621, ES621A,
ES621B, and ES622C ringers support an on-line redundant ringing
capacity of 100VA in a single-shelf plant or 200VA in a two-shelf plant.
Two ringers are required for each shelf, one active unit and one standby
unit. In the two-shelf configuration, two active and two standby units are
required. Note: If a two-shelf plant is used, the ringer loads on two
shelves must be isolated.
Rectifier/Converter
Plant
The rectifier/converter plant has -48V rectifiers that can provide load
power and power to operate converters capable of providing 24 volts at
25 amperes per converter or 130 volts at 4 amperes per converter. The
rectifiers provide input power for converters whose outputs are provided
on the secondary output bus. Methods of determining the number of
rectifiers and converters required to meet load, redundancy, and reserve
time requirements are discussed in Section 3.
Converter Plant The converter plant is powered from an external -48V source. In this
configuration, the converters operate from the primary power bus and
provide outputs on the secondary power bus. The plant input is provided
on the primary bus bulk output terminals. Restrictions on current
capacity of the secondary bus limits the secondary output.
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