Potter Releasing Systems - Manual (Page 62)

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Table 2 Secondary Power Supply Requirements
Service Use Standby Time Alarm Time
NFPA 72
• Central Station (PPU) 24 hrs. 5 mins.
• Local 24 hrs. 5 mins.
FMRC 1011 and 1012, Deluge and Pre-action Systems 90 hrs. 10 mins.
Where requested by FM or others.
90 Hours is not a UL requirement.
Calculation Table
1 2 3 4 5 6
Module/Device Quantity Standby mA Per Unit Total Standby Current Alarm mA Per Unit Total Alarm Current
Table 1 Current Requirements
*Add 23 mA plus current requirement of all devices connected for each output programmed as Trouble Bell
**Includes one zone short circuit current.
x 0.001 x 0.001
Total mA
Convert to A
Total A
5 min/12 or 10 min/6
Total Alarm AH
+ Total Standby AH
Total AH
Efficiency Factor
Required AH
Total mA
Convert to A
Total A
Multiply by hours from table 2
Total Standby AH
÷ ___
Use a battery with a higher AH rating than Required AH
÷ 0.85
x ___
Module/Device Standby mA* Alarm mA*
PFC-4410RC 121 274
RA-4410RC 12 12