VESDA VLP, Руководство по эксплуатации продукта

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VESDA by Xtralis VESDA VLP Product Guide
www.xtralis.com 31
8 Backup Battery
The power supply for the VESDA VLP detector is switched to a back up battery in the event of a mains power
supply disruption. The size of the back up battery 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 inspected and changed as per manufacturer’s specifications or
as per your local codes and standards.
To facilitate the calculation of the backup battery size a Battery Calculation Sheet is included below.
Equipment Normal loads @ 24 V DC Full alarm load @ 24 V DC
Load mA Qty Total Load mA Qty Total
Detector @ 3000 rpm 240 290
Detector @ 3500 rpm 280 330
Detector @ 4000 rpm 320 370
Detector @ 4200 rpm 340 390
Integral Display 60 80
Integral Programmer 20
(backlight off)
80
(backlight on)
Remote Display 90 110
Remote Programmer 50
(backlight off)
110
(backlight on)
Hand-held Programmer 50
(backlight off)
110
(backlight on)
System Relay Module 60 105
Remote Termination
Card - 7 Relays 60 105
Other 24V Loads Total
mA Total
mA
X X
Standby Hours Alarm Hours
=
Standby Capacity Alarm Capacity
Total Capacity =
S Alarm
Divided by 1000 for
Standby Capacity
Multiply by battery
factor X1.25
Table 8-1: Calculating the size of backup battery
Note: If the intelligent VESDA power supply is fitted it will report power failures (F15) on VESDAnet.
VESDA VLP & VESDA VLS with GPI terminals connected will maintain their aspirator speed for an
hour after the loss of mains power. After which, the aspirator speed will be limited to 3000 rpm to
conserve power.