SAG582127000
System Application Guide
Spec. No. 582127000 (Model 721
NPBB
)
Issue AF, February 26, 2014
Page 1 of 125
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
SYSTEM OVERVIEW
Description:
-48V DC @ up to 4000 Amperes Power System
The NetSure™ 721
NPBB
DC Power System is a complete integrated power system
containing -48V DC rectifiers or converters, op24V DC converters, intelligent
control, metering, monitoring, and distribution.
This power system is designed to power a load while charging a positive grounded
battery. This power system is capable of operating in a batteryless installation or off
battery for maintenance purposes. The power system is designed for operation with the
positive output grounded.
This system consists of the following components.
•
Distribution Cabinet
The system always includes a minimum of one distribution cabinet, which provides
DC distribution through fuses and/or circuit breakers. The distribution cabinet is
factory mounted in the relay rack or shipping brackets specified when ordered.
Four different sizes of distribution cabinets are available to accept from one (1) to
four (4) distribution panels. A variety of distribution panels are available that provide
load distribution, battery distribution, and dual voltage load distribution for use with
+24V converters. These distribution panels are configured to accept either bullet
nose type circuit breakers and TPS/TLS fuseholders, TPH fuses, TPL-B fuses, or
GJ/218 circuit breakers.
The distribution cabinet may be equipped with low voltage load disconnect (LVLD),
low voltage battery disconnect (LVBD), and manual battery disconnect.
•
ACU+ (Advanced Control Unit Plus) Controller
The controller provides power system control (including optional low voltage battery
disconnect (LVBD) and low voltage load disconnect (LVLD) control), rectifier control
(including a charge control function), converter control, metering functions, monitoring
functions, and local/remote alarm functions. The controller also supports rectifier
temperature compensation if the system is equipped with a temperature probe(s).
Temperature probe(s) may also be designated to monitor ambient temperature
and/or battery temperature. The controller also provides data acquisition, system
alarm management, and advanced battery and energy management. The controller
contains an LCD display and keypad for local access. The controller provides
Ethernet connection and supports software upgrade via its USB port. It also comes
with a comprehensive web page and SNMP capability for remote system
management. Refer to the ACU+ Controller Instructions (UM1M820BNA or
UM1M820DNA400) for more information.
•
Module Mounting Shelf (Spec. No. 588705000)
The system may contain one or more Spec. No. 588705000 module mounting
shelves, each of which houses up to six (6) rectifier modules or six (6) converter
modules. Refer to Power Data Sheet PD588705000 for more information.
•
Rectifier Modules (for use in Spec. No. 588705000)
The system may contain rectifier modules; which provide load power, battery
float current, and battery recharge current during normal operating conditions.
Refer to the Rectifier Instructions (UM1R483500E) for more information.
•
Converter Modules (for use in Spec. No. 588705000)
The system may contain converter modules; which provide load power, battery
float current, and battery recharge current during normal operating conditions.
Refer to the Converter Instructions (UM1C400483500E) for more information.
