Telephone Systems General Description

Appendix – Specifications
Reserve Power
Strata CTX General Description 11/02 73
Reserve Power
Two or four customer-supplied 12VDC reserve batteries (80 ampere-hours max.) can be connected
to either system to maintain normal operation during a power failure (see Tables 20~23). The
batteries are kept in a highly-charged state by the power supply’s battery charger 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.
The battery changer is standard on the CTX670 power supply. An optional ABCS battery changer
must be used in the CTX100 power supply.
Table 20 CTX100 Reserve Power Characteristics
Battery Charger Characteristics Maximum Battery Charger Drain (-24VDC)
Charger: current limiting
Nominal float voltage: 2.275 volts/cell
Charge current: 280mA amps maximum
Battery discharge cut-off voltage: 20.5 ±0.5VDC
Base Cabinet
Base + Expansion Cabinets
3.15 amps
6.30 amps
Table 21 CTX100 Typical Reserve Power Duration Estimates
1
1. Assumes 80 ampere-hours with 12VDC batteries.
Number of Cabinets 1 2
Estimated operation time Two-battery
configuration
25 hr. 12.5 hr.
Estimated operation time Four-
battery configuration
50 hr. 25 hr.
DC Current Drain (-24VDC)
3.15
amps.
6.30
amps.
Table 22 CTX670 Reserve Power Characteristics
Battery Charger Characteristics Maximum Battery Charger Drain (-24VDC)
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
1 cabinet
2 cabinets
3 cabinets
4 cabinets
6.0 amps
12.0 amps
18.0 amps
24.0 amps
5 cabinets
6 cabinets
7 cabinets
30.0 amps
36.0 amps
42.0 amps
Table 23 CTX670 Typical Reserve Power Duration Estimates
1
1. Assumes 80 ampere-hours with 12VDC batteries.
Number of Cabinets 1 2 3 4 5 6 7
Estimated operation time
Two-battery configuration
12.0 hr. 6.0 hr. 4.0 hr. 3.0 hr. 2.5 hr. 2.0 hr. 1.8 hr.
Estimated operation time
Four-battery configuration
24.0 hr. 12.0 hr. 8.0 hr. 6.0 hr. 5.0 hr. 4.0 hr. 3.5 hr.
DC Current Drain
(-24VDC)
4.6 amps. 8.7 amps.
12.8
amps.
16.9
amps.
21.0
amps.
25.1
amps.
29.2
amps.