Power Considerations; Reserve Power - Toshiba strata CT Installation & Maintenance Manual

Strata CT Installation

Power Considerations

Each Strata CT Base and Expansion Cabinet houses a power supply that furnishes power to
all of the stations and some of the peripherals that interface with the cabinet (see
Strata CT Electrical Characteristics
Table 2-1
Strata CT Primary AC Power Voltage
Input AC
AC Frequency
Watts per cabinet (continuous)
Watts for five cabinet system
Strata CT Primary Power Current Consumption (Rating in Amperes)
1 cabinet
2 cabinets
3 cabinets
4 cabinets
5 cabinets
Power Supply Unit (BPSU672)
DC voltage output specification
H

Reserve Power

Two or four customer-supplied 12VDC reserve batteries can be connected to the system to
maintain normal operation during a power failure (see
kept in a highly-charged state by the standard power supply and must be connected when the
system is operating normally. Fully charged batteries must be connected when normal AC
power is available, batteries cannot be connected after/during an actual power failure.
C
Reserve Power Characteristics
Table 2-2
Battery Charger Characteristics
Charger: current limiting
Nominal float voltage: 2.275 volts/cell
Charge current: 0.7 amps maximum
Battery discharge cut-off voltage: 20.5
Typical Reserve Power Duration Estimates (in hours)
Table 2-3
Number of Cabinets
Estimated operation time Two-battery configuration
Estimated operation time Four-battery configuration 24.0hr
Typical battery Current Drain (-24VDC)
Local electrical codes require certain standards for connecting commercial AC and reserve power to the Strata CT
system.
Important! See
2-4
240±20VAC
50/60 Hz, Single-phase
180
900
240VAC
2.0 amps
4.0 amps
6.0 amps
8.0 amps
10.0 amps
-24VDC (-26.3~-27.8VDC, 6.0 DC amps )
+5VDC (+4.5~5.5VDC, 4.0 DC amps)
-5VDC (-4.5~-5.5VDC, 0.8 DC amps)
±
0.5VDC
1
12.0hr
4.6amps 8.7amps 12.8amps 16.9amps 21.0amps
"EMC Compliance" in final chapter
Tables 2-2 and 2-3). The batteries are
Maximum Battery Charger
-240VDC
1 cabinet 6.0 amps
2 cabinets 12.0 amps
3 cabinets 18.0 amps
4 cabinets 24.0 amps
5 cabinets 30.0 amps
2 3
6.0hr 4.0hr
12.0hr 8.0hr
"Notes to Users".
Strata CT I&M Manual October 2000
Table 2-1).
4 5
3.0hr 2.5hr
6.0hr 5.0hr