Instruction manual

POWER AND GROUNDING
Standby Power System—Multi-Carrier Cabinet System
Battery Reserve (Multi-Carrier System)
The system provides a 10-second power holdover during power interruptions. A battery reserve
supplies power to a single control carrier for up to 10 minutes during a commercial power failure.
With duplicated control carriers, power is available for 5 minutes. If additional holdover power is
required, an alternate, independent source of on-premises power is required to maintain the sys-
tem for a limited time. An external, commercial Uninterruptible Power Supply (UPS) or a battery
backup arrangement are used as an alternate source of power during a commercial power
failure.
Uninterruptible Power Supply (Multi-Carrier System)
The uninterruptible power supply (UPS) protects the system equipment from voltage lags, over-
voltage conditions, blackouts, and line frequency fluctuations. The UPS uses a microprocessor
controlled device to regulate and condition the commercial power. During commercial power
failure, UPS provides dependable and reliable backup power for short durations.
Note: Any peripheral that is connected to the system and derives its power from a wall
socket will not be supported during a power outage. This also applies to the 7407D
and 7404D voice terminals.
For most multi-carrier cabinet system configurations, any UPS that meets the requirements given
in Table R or Table S can be used with the system for standby power.
TABLE R. AC Power Requirements
No. of No. of
Control Port Power Frequency Power
Carrier Carrier Rating (KVA) Hertz Factor
1 0 0.90 60 ± 5% 0.70
1 1 1.50 60 ± 5% 0.70
1 2 2.10 60 ± 5% 0.70
1 3 2.70 60 ± 5% 0.70
1 4 3.30 60 ± 5% 0.70
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