Instruction manual

POWER AND GROUNDING
Standby Power System—Multicarrier Cabinet System
Battery Reserve (Multicarrier 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 altemate source of power during a commercial power
failure.
Uninterruptible Power Supply (Multicarrier 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 multicarrier cabinet system configurations, any UPS that meets
in Table AN or Table AO can be used with the system for standby power.
TABLE AN. AC Power Requirements
the requirements given
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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