Strata CT Installation
2-4
Strata CT I&M Manual October 2000
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
).
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
and
). The batteries are
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.
Table 2-3
Typical Reserve Power Duration Estimates (in hours)
Local electrical codes require certain standards for connecting commercial AC and reserve power to the Strata CT
system.
Important!
See
in final chapter
.
Table 2-1
Strata CT Electrical Characteristics
Strata CT Primary AC Power Voltage
Input AC
AC Frequency
Watts per cabinet (continuous)
Watts for five cabinet system
240
±
20VAC
50/60 Hz, Single-phase
180
900
Strata CT Primary Power Current Consumption (Rating in Amperes)
240VAC
1 cabinet
2 cabinets
3 cabinets
4 cabinets
5 cabinets
2.0 amps
4.0 amps
6.0 amps
8.0 amps
10.0 amps
Power Supply Unit (BPSU672)
DC voltage output specification
-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)
Table 2-2
Reserve Power Characteristics
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
±
0.5VDC
Maximum Battery Charger
1 cabinet
2 cabinets
3 cabinets
4 cabinets
5 cabinets
-240VDC
6.0 amps
12.0 amps
18.0 amps
24.0 amps
30.0 amps
Number of Cabinets
1
2
3
4
5
Estimated operation time Two-battery configuration
12.0hr
6.0hr
4.0hr
3.0hr
2.5hr
Estimated operation time Four-battery configuration 24.0hr
12.0hr
8.0hr
6.0hr
5.0hr
Typical battery Current Drain (-24VDC)
4.6amps
8.7amps 12.8amps 16.9amps
21.0amps
H
C
Summary of Contents for Strata CT
Page 36: ...Strata CT Configuration 1 22 Strata CT I M Manual October 2000 H C ...
Page 94: ...Strata CT Installation 2 58 Strata CT I M Manual October 2000 H C ...
Page 242: ...Peripheral Installation 6 54 Strata CT I M Manual October 2000 H C ...
Page 258: ...ACD Installation 7 16 Strata CT I M Manual October 2000 H C ...
Page 274: ...Fault Finding 8 16 Strata CT I M Manual October 2000 H C ...
Page 364: ...ISDN Interfaces 10 38 Strata CT I M Manual October 2000 H C ...
Page 370: ...Notes to Users A 6 Strata CT I M Manual October 2000 H C ...