Dynacord DEM 317 Batterie-MODULE 24V/65 Ah Explanation of terms Continuous battery power supply

7.Explanation of terms:

—Continuous battery power supply

In this mode, the battery is constantly kept in full charge. It only gives off current if the DC source, supplied by the mains, fails.

—Nominal capacity:

The nominal capacity is the value in ampere-hours for a 20-hour even, uninterrupted discharge with I20 up to the discharge voltage of 1.75 V/cell at a temperature of 22°C.

—Capacity:

The capacity of a battery is the amount of electricity which can be extracted under the conditions in question. It depends on the discharge current, the discharge voltage and the temperature.

—Service life

For batteries in alarm apparatus and emergency announcing systems, the end of a battery’s servive life is reached when the capacity is less than 80% of the rated capacity.

—Stored energy time

This is the time span between recognizing a failure in the mains supply and remedying this failure.

—Alarm duration

The alarm duration is the time during which the alarm signal is given off.

—Emergency announcement duration

This is the time during which announcements are made to clear the building or section of a building.