Lucent Technologies CPS4000 - Lvd;Thermal Management Circuit Pack

Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
2 - 20 Product Description Issue 13 December 2000
Output Distribution, continued
LVD/Thermal
Management
Circuit Pack
In single-shelf plants or in the initial shelf of multiple-shelf plants, the
-48V CPS Output Distribution unit equipped with a
Low-voltage Disconnect (LVD)/thermal management optional circuit
pack (BSP2 or BSP2C) provides the following features:
• Alarm conditioning for control unit presentation
• LED test power for up to four J85504D-1 Battery Modules
• A low-voltage disconnect contactor (100A for single-shelf plants or
150A for multiple-shelf plants) and its control circuit
• The -48V CPS system features optional thermal probes for
monitoring battery temperature. This temperature information is
utilized as input for a battery thermal protection feature that is
implemented as slope compensation.
CPS4000 incorporates a thermal management system for battery
protection against thermal instability. If the battery temperature exceeds
25°C, the plant voltage is automatically reduced to help protect the
batteries against thermal instability and to extend battery life at high
temperatures (see Figure 7-2). This is the factory-set NAFTA Thermal
Management Mode System for North America only. This feature is
provided with ES646, ES646B, ES647, ES648A/B/C/BZ control units
and all ES660 and ES660C rectifiers. This feature compensates the
battery float voltage over the temperature range of +25°C to +75°C.
CPS4000 PLUS offers an optional extended range slope thermal
compensation (EURO Mode). The EURO Mode slope thermal
compensation is a switch-selectable option, with the NAFTA Mode as
the factory set standard. Available in plants with an ES648 MCU and
only ES660C rectifiers, this thermal management feature compensates
the battery float voltage over the temperature range of -20°C to +75°C.
This option will provide a higher float voltage for temperatures below
20°C. By boosting the float voltage as battery temperatures decrease, the
battery capacity reduction at low temperatures can be minimized.
Caution
Using a mixture of ES660 and ES660C rectifiers in a shelf with a new
control unit that is set to the EURO mode will cause the ES660
rectifiers to go into a high voltage shutdown.