Zeta Alarm Systems Infinite 8 Manual de instalación descargar pdf (Pagina 34)

INFINITY ID2 INSTALLATION MANUAL. Software Versions: PANEL O.X-R8629 & LOOP O.J-R8624

Approved Document No: GLT-211-7-1

Issue 1.0 Author: MG Date: 22/1/2013 PAGE 33

20. STANDBY BATTERY REQUIREMENTS

20.1 Standby battery calculation

In order to calculate the standby battery size required, the following formula can be used:-

Battery Size (Standby time in Amp Hours) = 1.25 x [(Df x T

ALM

x I

ALM

)+ (T

SBY

x I

)]

(DF is a derating factor (typically = 2) used when a battery has to supply a high current load)

Where:

ALM

= Maximum time in hours required for the alarm [½ hour is most common time]

ALM

= Total Alarm Current in amps for all alarm devices connected to the alarm circuits

SBY

= Standby time in hours for the system after mains failure [normally 24, 48 or 72 hr]

= Quiescent current in amps of control panel in fault condition [because of mains failure]

= Quiescent current in amps of all detection zones.

20.2 Device Values for Battery calculation

Device

Quiescent

Alarm

Comment

Infinity ID2 Panel

50mA

102mA

This is the current used during mains failure

Infinity ID2 Repeater

50mA

75mA

Infinity ID2 Sounder

Flasher Base + detector

0.9mA

7.2mA

14.7mA for first alarm on a zone. Subsequent

sounder flashers will take 7.2mA (Detector Reset)

ID2 Call Point

0.6mA

2.5mA

Xtratone Sounder

0.65mA

4.5mA

Xtratone Sounder Flasher

0.65mA

7.3mA

ZAIO-M I/O Interface

1.0mA

2.0mA

20.3 Example battery calculation

A system comprises of a 4 zone ID2 panel, with 10 sounder-flasher bases, 1 call point, 1 Wall sounder flasher

(xtratone), and one I/O per zone and the required standby is 24 hours. It will need to operate in alarm for ½

hour.

Calculate the battery size required.

ALM

= 0.5 Hr

SBY

= 24 Hr

= 0.050A (Quiescent current for panel)

= 4 x ((10x0.9)+0.6+0.65+1.0)/1000 = 4 x 11.25/1000 = 0.045 A

= 0.102A

= 4 x ((10x7.2)+2.5+7.3+2.0)/1000 = 4 x 83.8/1000 = 0.3352 A

Therefore using the equation:

Battery Size (Standby time in Amp Hours) = 1.25 x [(Df x T

ALM

x (I

) )+ (T

SBY

x (I

+ I

))]

Battery Size (Standby time in Amp Hours) = 1.25 x [(2 x 0.5 x (0.102+0.3352)) + (24 x (0.050 + 0.045 ))]

Battery Size (Standby time in Amp Hours) = 1.25 x [0.4372 + 2.28]

Battery Size (Standby time in Amp Hours) = 1.25 x 2.7172

Battery Size (Standby time in Amp Hours) = 3.3965 Amp Hours

This system would require a minimum of 3.3965 Ah batteries, so we would recommend using 3.4Ah batteries (as

the enclosure is designed for this size batteries).

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