Ziton ZP3, Installation Operation & Maintenance

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ZP3 Fire Control Panel
Power Supply
ZP3 Fire Control Panel Manual
Page 3 - 16 UD1160.3 Iss 6 (25/02/2005)
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3
Using the information from the previous page, calculate the power supply and battery
capacity.
Power supply load calculation
Description Calculated load PSU Capacity Pass Fail
Quiescent Amperes L1 1.6 A
Fire Alarm Amperes L2 3.4 A
Notes:
1. Insert the calculated quiescent load into L1, and the calculated fire alarm load into L2.
2. If the calculated load is below the PSU capacity, tick "Pass", otherwise tick the "Fail".
3. Should the ZP3 PSU not be able to supply the system load, then either the system
design will need to be modified, or a separate external power supply used for part of
the load.
Battery calculation
Assuming that the system must operate in the quiescent state for 24 hours, and with a full
alarm load for 0.5 hour, calculate the battery size as follows.
Description Calculation Result No
Standby Ampere/Hours
(Quiescent load+0.3 Amps) X 24 X
1.05
C1
Fire Alarm Ampere/Hours (Fire alarm load+0.5 Amps) X 0.5 C2
Total Ampere/Hours C1 + C2 C3
Battery capacity over-rating (25%) C3 X 1.25 C4
Nearest size battery C5
Notes:
1. Multiply the Quiescent Load plus the basic panel load by 1.05 (this adds 5%) to obtain
the possible extra load resulting from the panel being in a fault, disabled, or other non-
fire condition. Multiply this figure by 24 to obtain the Ampere/Hours needed for 24-
hour operation. Insert the result into C1.
2. Multiply the Fire Alarm Load plus the basic panel load by 0.5, and insert the result into
C2.
3. Add C1 and C2, and insert the result into C3.
4. Add 25% to C3 to calculate the battery over-rating requirement. This allows for the
normal deterioration in battery performance over the batteries' lifetime.
5. Select the nearest size battery available, rounding upwards. Remember that the
largest battery that can be accommodated in the ZP3 enclosure is 30 Ampere/Hour.