Xtralis VESDA VLC-500, Руководство по установке

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VESDA by Xtralis VESDA VLC Installation Guide
www.xtralis.com 11
5 Battery Backup
The power supply for the VESDA VLC detector may be switched to a back up battery in the event of the
supply being disrupted. The size of the battery back up is determined by local standards and codes, the total
power required by the system, back up time required, allowance for reduction in capacity with age and
expected temperature variations.
Note: It is recommended that batteries be changed as per the battery manufacturer’s specifications or as
per the relevant local codes and standards.
5.1 Backup battery size calculation sheet
The nominal battery voltage is 24 VDC .
Use Table 5-1 to calculate and to determine the battery backup requirements for your fire detection system.
Table 5-1: Calculations to determine the battery backup requirements
Normal Load @ 24 VDC Full alarm load @ 24 VDC
Equipment
Load mA Number Total Load mA Number Total
Detector 225 245
Remote Display 90 110
Remote Programmer 50
(backlight off)
110
(backlight on)
Hand-held Programmer 50
(backlight off)
110
(backlight on)
Other 24 V loads
Total mA Total mA
X X
Standby hours Alarm hours
= X 1.06
Standby capacity Alarm capacity
Total capacity = S Alarm capacity
Divided by 1000 for standby capacity
Multiplied by battery factor (Normally 1.25)