Bosch Security Systems | 2006-06 | 9922 141 10377 en
Plena Voice Alarm System | Installation and User Instructions | IEC60849 en | 115
IEC60849 - 5.6 Secondary power supply
table 11: IEC60849 - 5.4 Secondary power supply
Requirement Compliance Signature
If the building is to be evacuated following
primary power failure, a secondary power
supply shall be provided. This shall be capable
of operating the system in the emergency
mode for a period equal to twice the
evacuation time determined by the appropriate
authority for the building. In any event, the
secondary power supply shall be capable of
powering the system for a minimum of 30 min.
Power consumption data is available in various
Plena equipment data sheets. With this information
the necessary back up capacity can be calculated,
Responsibility of the installer.
If the building is not to be evacuated following
failure of the principal power supply, the
secondary power supply shall be capable of
operating the system for at least 24 h, or 6 h if
an emergency generator is available, and then
powering the system in emergency mode for a
minimum of 30 min. If a building remains
unoccupied for several days, provision should
be made to ensure that the voice alarm system
is capable of operation in emergency mode for
30 min when the building is re-occupied.
See above. Responsibility of the installer.
Non-emergency functions within the system,
such as background music, shall not operate
from the secondary power supply if this will
reduce the capacity for emergency operation.
Responsibility of the installer by connecting the
BGM source to the primary power supply. From
release 1.1 onwards the BGM will be deactivated.
If batteries are used as a secondary power
supply they shall be of the secondary type,
complete with automatic charging facilities.
Where lead-acid batteries are used they shall
be of the valve-regulated type unless otherwise
specified, and the charging system shall
incorporate charging current compensation for
changes in the ambient temperature, where
this is necessary to achieve the specified
battery life.
Responsibility of the installer.
Batteries shall be used in accordance with the
manufacturer's recommendations in order to
achieve their specified life, which shall be not
less than four years. The end of life shall be
taken as the time when deterioration to less
than 80% of the rated ampere- hour capacity
(at the one-hour rate) has occurred.
Responsibility of the installer.
Automatic charging shall ensure that the
batteries are fully recharged to 80% of their
maximum rated capacity from the fully
discharged state in a period of not more than
24 h.
Responsibility of the installer.
Adequate ventilation and protection against
corrosion and dangers resulting from gases
emitted by the batteries shall be provided.
Responsibility of the installer.
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