Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
Issue 13 December 2000
Product Description 2 - 9
Power Modules
Overview
-48V CPS rectifiers and converters are designed
specifically for applications where size, weight, wide
temperature range, and ease of installation and
maintenance are of overriding importance. Switchmode
circuit design provides excellent output regulation over
a wide range of load currents and input voltages. Power
processing at higher frequencies allows for substantial
reduction in the size and weight of energy storage
elements. Higher frequencies and the use of forced-air
cooling help achieve high power density and light
weight.
Each power unit is equipped with two field-replaceable, self-contained
cooling fans. Thermal alarm circuitry offers additional protection by
shutting the power unit down and providing an alarm when the internal
temperature exceeds 75° Celsius. Forced air cooling improves the
reliability of power units by maintaining their internal temperatures very
close to the outside ambient temperature.
-48V CPS power units feature automatic load-share circuits which force
the power units to apportion the plant load equally, reducing the stress
on individual units. These power units are self-protected so that short
circuits and system overloads are handled automatically, i.e., if a short
circuit is removed or a system overload reduced the power units will
automatically resume normal operation.
Signal interfaces between -48V CPS rectifiers and the plant control unit
provide alarm monitoring, rectifier output voltage adjustment, and
rectifier On/Standby control. For converters, the signal interface with
the control unit provides alarm monitoring but does not allow voltage
adjustment.
ES660 and
ES660C Rectifiers
•
The ES660 rectifier provides an output of 12.5 amperes at 54.5
volts.
•
The ES660C rectifier provides an output of 15.0 amperes at 54.5
volts.
ES680 and ES681
Converters
•
The ES680 converter converts 48Vdc to 130Vdc at
4 amperes.
•
The ES681 converter converts 48Vdc to 24Vdc output at 25
amperes.
Note: Alternative voltages are available under certain conditions.
Alarm
Thermal
Alarm
On
Standby
Rectifier / Converter
