Alpha Technologies FlexPoint FPR1207-F - Technical Manual - Manual (Page 15)

3.0 Operation, continued
3.4 Operational Modes
3.4.1 Normal Mode
This mode is defined as a state where the load is being supplied from AC input, and the
battery is floating, charging or in the process of being tested.
When the unit is initially powered-up, or whenever the input supply has been restored
after an outage, the unit operates in a charge mode. Once the battery voltage has
reached the full charge voltage, the unit switches to float mode. If the input voltage is
less than the minimum AC input, the system switches to operating in back-up mode.
After approximately 180 days of operation, the battery is tested to determine whether it
has adequate capacity. It is tested when the following conditions are met:
1. The system is operating in float mode
2. The battery is fully charged
If the battery is not fully charged, or the system is not operating in float mode when the
test becomes due, the test is postponed until those conditions are met. If the AC input
is lost, or the unit is overloaded during the battery test, it will be aborted and indefinitely
postponed until conditions are valid.
Once a battery test has been successfully executed, another test will be scheduled to
occur in 180 days.
3.4.2 Back-Up Mode
The load is being supplied from the battery while the battery voltage is greater than
11.5Vdc, which is approximately 25% state of charge. When the battery falls below this
point it is disconnected.
3.4.3 Emergency Use
Battery Emergency Use mode occurs after the back-up mode has finished, which the
user initiates by pressing “Battery Emergency Use” button. During this mode the battery
will be allowed to discharge until its voltage is 10.5Vdc, which is 0% state of charge. At
this time the system will shut down.
The operator should be aware of the following:
• Reserve time with 7W load at 25°C is approximately 30 minutes.
• Capacity reserved for emergency use is approximately 25%.
3.4.4 Charging Mode
Float charge maintains the battery at 100% capacity. If the battery is required to support
operation, charging ceases. When primary power is restored, battery charging resumes
and continues until one of the following occurs:
• Battery has reached 100% of capacity. Charging is reduced to float charge level.
Normal charge current is approximately 350mA. When the current falls below
100 mA, the mode changes to float. In the event the current does not reduce, the
software triggers the mode change.
• Another power failure occurs requiring battery support. Charging ceases until
primary power is restored.
• Additional power is required by the ONT. Power is diverted from the battery charger
and sent to the ONT. When demand for additional power ceases, normal battery
charging resumes.
• The battery is depleted. No special action is required to restore normal operation
once primary power is restored.
15 010-344-B1-001 Rev. A (2/2014)