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3.2.19 USVF (Not for U.S.)

Introduction

The uninterruptible power supply (USVF) for the OfficePoint system plugs into a special slot and is secured by screws. It connects to the power outlet using a modular power cord.

Functions

Nominal voltage range: 100 VAC - 240 VAC
Nominal frequency: 50 Hz - 60 Hz
Ring generator: 75 VAC, 20/25/50 Hz
Partial voltages: +5 VDC, -48 V
Battery charger: 2 x 12 V (20.4 V-27.6 V)
Power consumption: 90 W

Interfaces

Figure 3-17 USVF Interfaces (S30122-K5659-)

 
DANGER 
System voltage can only be switched on or off by plugging in or unplugging the power plug. If using a USVF, deactivate battery mode first.  

Capacities and Bridging Times for Uninterruptible Power Supplies

The battery bridging times during power outages are determined under the following conditions for the USVC in OfficeCom and the USVF in OfficePoint:

The power supply units in the system are operating at 60% of capacity.
The battery ambient temperature is +20 degrees Celsius.
The cut-off voltage is 1.7 volts per cell.
The batteries are fully charged at the beginning of the power outage.

The following reference values apply to the bridging times, based on the conditions listed above:

Table 3-15 Capacities and Bridging Times for USVC/USVF

Communication Server 
Capacity/
Battery Voltage 
Bridging Time 
OfficeCom 
1.2 Ah/48V 
15 minutes 
OfficeCom 
7 Ah/48V 
3 hours 
OfficeCom 
12 Ah/48V 
6 hours 
OfficePoint 
1.2 Ah/24V 
15 minutes 
OfficePoint 
7 Ah/24V 
3 hours 
OfficePoint 
12 Ah/24V 
6 hours 

Voltages per Battery Cell (example: Yuasa)
Charging current with current limiting: 
2.4 V 
Charging current without current limiting 
2.275 V 
Discharging current 
1.7 V 

The battery cell voltage is 2.0 V, and the available capacity sampled between 2.3V and 1.7V.
 
Follow the manufacturer's instructions for charging and discharging the batteries.  

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