amperes electronics
Minimum Battery Capacity Required
The battery capacity required is subjected to either the availability of these :
The system must run for at least 6 hours and support evacuation broadcasts in all zones for 30 minutes.
The system must run for 24 hours and support operation for 30 minutes after that.
Minimum battery capacity required :
Cmin = 1.25 (( T1 x I1 ) + D ( I2 x T2 )) Ah
Cmin - Min capacity of battery when new at 20 hour discharge rateat 20 deg C in Ah
1.25 - Ageing factor allowing 5% per year for 4 years
T1 - Battery standby period in hours
T2 - Alarm time in hours (as 0.5 or 30 minutes)
I1- Battery standby load in amperes
I2 - Battery alarm load in amperes
D2 - Battery de-rating factor (Usually 1.75 for inefficiency of battery under load)
Source : BS5839-1 : 2013 : annex D
Connecting to small loads
Example of a back-up power supply setup for small loads under 25A at 24V DC.
Power packs are wired in series to 24V, connected to the BATT IN terminals of the BC9740 charger and then connected to the PS9400 power supply.
WARNING: Use appropriate cable size for the total load. We recommend 2.5mm high temperature PVC insulated cables.
Connecting to large loads
For loads over 25A it is necessary to use an external contactor to connect the DC backup to the DC input of the amplifier. You can choose an AC or DC contactor with the correct rating.
WARNING: Use cables of the correct size for the total load. We recommend 2.5mm or larger high temperature PVC insulated cables.
Cable size of back up supply
Use the correct cable size to carry the full load current from the battery bank to the amplifiers. Undersized cables may cause a fire hazard.
Recommendations:
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Use proper cable lugs for secure connections
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Keep power cables separate from signal or output cables
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Refer to the cable table for sizing guidelines, taking into account routing and ambient temperature.
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Sales Office (Malaysia)
70, Jalan Industri PBP 3,
Taman Perindustrian Pusat Bandar Puchong 47100, Puchong, Selangor, Malaysia.
Tel: +603-5882 7757 / 7758
Production Factory (Malaysia)
2, Jalan Meranti Puchong D25@Meranti Puchong 47120 Puchong, Selangor, Malaysia
Amperes Asia Pte Ltd
Export Sales Office - Singapore
(Co Reg: 201102253E)
1, North Bridge Road, #13-03, High Street Centre, Singapore 179094
Sales Office (Malaysia)
70, Jalan Industri PBP 3,
Taman Perindustrian Pusat Bandar Puchong 47100, Puchong, Selangor, Malaysia.
Tel: +603-5882 7757 / 7758
Production Factory (Malaysia)
2, Jalan Meranti Puchong D25@Meranti Puchong 47120 Puchong, Selangor, Malaysia
Amperes Asia Pte Ltd
Export Sales Office - Singapore
(Co Reg: 201102253E)
1, North Bridge Road, #13-03, High Street Centre, Singapore 179094