Det-Tronics Eagle Quantum Premier - Determining Power Requirements; EQP2410 PS(-P) Converter

95-8533
3-6
18.2
IMPORTANT
The EQP21X0PS(–X) Power Supplies
provide EQP System devices with power
from input supply 120 to 220 V ac. Use
of this power supply does not provide
the source of the secondary supply such
as secondary source batteries, their
supervision or charging, or UPS. Per
NFPA 72-2013 requirements, such power
supply related requirements must be
separately provided for and be accepted
by the local Authority Having Jurisdiction
(AHJ).
EQP2410PS(–P) Converter
The EQP2410PS(–P) Converter converts the
DC input voltage to an adjustable, controlled
and galvanically separated 24 Vdc output
voltage. The converter is always connected to
the secondary source.
Determining Power Requirements
Use of the EQP2120PS(–B) Power Supply
provides the primary and secondary supplies.
The EQP2410PS(–P) Converter provides the
secondary supply only. It is used in conjunction
with the EQP2120PS(–B) Power Supply, which
serve as the primary supply (see Figures
3-23A, B and C for available configurations).
The customer is responsible for providing
adequate secondary power supply source
needs. The ac input current requirements for
EQP2XX0PS(–X) in relation to EQP system
dc current load (power supply output) are
calculated using the following formula:
Input Current = [Output Current x Output
Voltage÷ Input Voltage ÷ Efficiency] + 0.43 A
Example:
[20 Adc x 28 Vdc ÷ 120 Vac ÷ 0.91] + 0.43 =
5.56 Aac
For Standby Current (amperes ac)
requirements, use Total Standby Current
(amperes dc) for the system’s applicable field
devices from Table 3-1.
For Alarm Current (amperes ac) requirements,
use Total Alarm current (amperes dc) for the
system’s applicable field devices from Table
3-2.
Standby Current Standby Time* Standby Amp Hours
X=
24 Hours
Alarm Current 5 Minute Alarm Time* Alarm Amp Hours
X=
0.083 Hours
Sum of Standby and Alarm Amp Hours =
Multiply by 1.2 (20% Safety Factor) X
Total Battery Amp Hour Requirement
T0014B
* FM MINIMUM REQUIREMENT FOR EXTINGUISHING SYSTEMS
IS 24 HOURS STANDBY TIME AND 5 MINUTES ALARM TIME.
Table 3-4—Backup Battery Requirements for Automatic Release of Extinguishing Systems Except Deluge
Standby Current Standby Ti me* Standby Amp Hours
X=
90 Hours
Alarm Current 10 Minute Alarm Time* Alarm Amp Hours
X=
0.166 Hours
Sum of Standby and Alarm Amp Hours =
Multiply by 1.2 (20% S afety Factor) X
Total Battery Amp Hour Requirement
T0040B
*FM MINIMUM REQUIREMENT FOR DELUGE SYSTEMS IS
90 HOURS ST ANDBY TIME AND 15 MINUTES ALARM TIME.
Table 3-5—Backup Battery Requirements for Deluge and Pre-Action Applications