Ravel RE-2504, Инструкция по установке, пусконаладке и эксплуатации

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RE / DD / UM / 2508 V1.2- 01
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Chapter 7: Battey Calculation
Use Table 7.4 to calculate the total standby and alarm load in
ampere hours (AH). This total load determines the battery size (in
AH), required to support the control panel under the fail of the AC
Power Supply. Complete the table 7.4 as follows:
1.
Enter the NFPA standby and alarm times (refer to NFPA
requirements below).
2. Calculate the ampere-hours fro standby and Alarm, and then sum
the standby and alarm ampere-hours.
3. Multiply the sum by the derating factor of 1.2 to calculate the
proper battery size (in AH).
4. Write the ampere hour requirements on the protected premises
lable located inside the cabinet door.
TABLE 7-4: Total Secondary Power Requirements at 24 VDC
Normal Condition : X = S (Amps) x ____ Hrs. (Backup time
required)
Alarm Condition : Y = F (Amps) x ____ Hrs. (Backup time
required)
Battery Ah required : AH = (X + Y) x 1.2 (Derating Factor).
Note: Refer specification (Page 10) for Quiescent, standby, alarm
currents
System current ( S ) = Quiescent C
(Standby current X No. of zone)
Fire current ( F ) = (Alarm Current x no. of zones) +
(NAC Current x No. of NAC’s).