Potter PSN-64 - Battery Calculation Worksheet; Calculation Table

PSN-64:15
PSN-106, PSN-64, PSB-10 • 5403590 • REV A • 12/09
Battery Size UL 24-hour ULC 24-hour
7 AH .213 Amps .213 Amps
18 AH .603 Amps .603 Amps
33 AH 1.134 Amps .603 Amps
55 AH 1.913 Amps .603 Amps
* Maximum Allowable Standby Current (24-hour standby time)
Secondary Power Supply Requirements Table
Service Use Standby Time Alarm Time
NFPA 72
• Central Station (PPU) 24 hours 5 minutes
• Local 24 hours 5 minutes
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
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
Effi ciency Factor
Required AH
Total mA
Convert to A
(* Refer to Maximum allowable standby current)Total A
Multiply by hours
Total Standby AH
÷ ___
Use a battery with a higher AH rating than Required AH
÷ 0.85
x ___
Battery Calculation Worksheet
Standby current for the PSN-64 is 75 milli-amps.
PSN-64 1 75 75 75 75