User's Manual

Chapter 2 System Description
2.3.6 Battery Management System (BMS)
The BMS,
which is mounted in the control cabinet above the PDU, is a high performance,
modular power supply system and battery charger, which provides the HBE, LBE, HB TSC
and LB TSC with the necessary voltage and current for normal operation.
The DRU-2KW employs a single mounting shelf containing a controller and two (2) identical
rectifier modules. The BMS also includes a 12V pure lead-tin VRLA AGM back-up battery,
which allows the BMS to provide power to the connected components for up to 60 minutes
during a power outage.
The rectifier modules are high efficiency (85 - 90%) air cooled units with a typical power
factor of 0.99. The modules are fed from the same two-pole, 10A circuit breaker in the PDU
via the BMS mounting shelf.
The rectifier modules’ DC outputs are bussed together by the BMS mounting shelf. With the
use of five (5) front panel circuit breakers and ten (10) rear panel load terminals, the BMS
is able to proved five (5) individual 12 VDC outputs – see Table 2-2
.
Two (2) temperature probes are connected to the BMS, allowing for a temperature
compensated rectifier output. One probe is mounted to the BMS battery, while the other is
mounted to the back of the control cabinet copper ground bar.
Form-C alarm relay contacts on the BMS mounting shelf rear panel allow the exciters to
indicate when an AC failure or BMS failure has occurred on the BMS.
Figure 2-17 BMS and Rectifier Module
Table 2-2 BMS Circuit Breakers
Name Rating Circuit Breaker For
BAT CB 100A Battery (rear panel)
SPARE 2.5A Spare
TSC-H 5A HB TSC and HB HPA Controllers
TSC-L 5A LB TSC and LB HPA Controllers
HBE 10A HBE
LBE 25A LBE
SX03-30000-01-M01
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