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Bettery Charger

The document summarizes a battery charging system comprising a 24V/200AH sealed maintenance free battery and a float and boost charger. The float charger operates at 230V AC and outputs 20A at 25-27V DC to charge the battery. The boost charger can output 21.6-27.6V DC at 2-20A to further charge the battery if the voltage drops below 21V. The system automatically switches between float and boost modes to maintain the battery charge and provides power to loads from the battery if AC power fails during boost charging.

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Arun Gupta
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166 views2 pages

Bettery Charger

The document summarizes a battery charging system comprising a 24V/200AH sealed maintenance free battery and a float and boost charger. The float charger operates at 230V AC and outputs 20A at 25-27V DC to charge the battery. The boost charger can output 21.6-27.6V DC at 2-20A to further charge the battery if the voltage drops below 21V. The system automatically switches between float and boost modes to maintain the battery charge and provides power to loads from the battery if AC power fails during boost charging.

Uploaded by

Arun Gupta
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Battery charging system comprising of 24 V/200 AH sealed maintenance free battery and a Float and Boost charger as per

following specification & details :A. FLOAT CHARGER ----------------1. Operating voltage : A.C. 230 Volts +/-10% Single Phase 50 Hz. 2. Output of 20 Amps. : 25-27 V D.C. corresponding to 2.15-2.25 V/cell at a max. current

3. Regulation : Better than +/-1% for 0-100% change in load and +/-10% change in line voltage. ( as measured before blocking diode ) 4. Protection : a. MCB in common A.C. input. b. RC Snubber for rectifying diodes. c. Blocking diode in D.C. Output to prevent reverse drainage of d. Against overload and short circuit. e. MCB in D.C. output & Battery path. 5. Metering voltage. : a. D.C. Voltmeter 0-50 V with selector switch for output/battery b. D.C. Ammeter 0-25 A, for output current. All meters are 96x96 sq.mm., Cl.1.5. 6. Indications 7. Alarms : (a) Mains ON. (b) Float ON. : (a) Load D.C. under voltage. (b) Load D.C. over voltage. (c) Mains Fail. ( common ) (d) Float Charger Fail.

battery in charger.

LED indication & audio alarm with Manual accept & reset switch is provided. 8. Ripple : Less than 2% r.m.s. of max. rated voltage.

B. BOOST CHARGER ---------------1. Operating voltage : A.C. 230 Volts +/-10% Single Phase 50 Hz. 2. Output : 21.6-27.6 V D.C. corresponding to 1.80-2.30 V/cell at a max. current of 2-20 Amps. 3. Metering : Centre zero D.C. Ammeter 25-0-25 A for battery charging/discharging current,

All meters are 96x96 sq. mm., Cl.1.5, 90 deg. Deflection. 4. Indications 5. Alarms : (a) Boost ON. : (a) Battery earth leakage. (b) Boost Charger fail.

LED indication & audio alarm with Manual accept & reset switch is provided. OTHER SPECIFICATION ARE SIMILAR TO THAT OF FLOAT CHARGER. -----------------------------------------------------AUTO/MANUAL MODE - In AUTO mode, charger automatically switches over to Boost mode ( from Float mode which is default mode ) if battery voltage drops below 21.0 V corresponding to 1.75 V/cell & reverts back to Float mode, if battery voltage reaches 27.6 V corresponding to 2.3 V/cell. In MANUAL mode, charger can be operated in Float/boost mode. If A.C. supply fails, during Boost charging, then battery is connected automatically to load. Suitable cell tap diodes are provided for same. If current on load bus is greater than Float charger rating then remaining current is automatically delivered by battery. COMMON FEATURES. CABINET :- (a) Dimensions 1450 x 750 x 425 mm ( H x W x D ) (b) Sheet thickness 1.6 mm. (c) Degree of protection IP 32. (d) Painting Enamel paint shade RAL 7032. (e) Cable entry Bottom (f) Component accessibility Front . WIRING :- (a) Power Multistrand PVC insulated copper wire 1.1 KV grade.. (b) Control 1.5 sq. mm multistrand PVC insulated copper wire 1.1 KV grade except to/from PCB connector. (c) Number ferrules for power & control wiring. (d) External termination :- On suitable rated terminal board. EARTHING :- Suitable terminal bolts. DCDB :- 6 Nos. 10 A DC 2 pole MCB, with LED indication, for outgoing. BATTERY :Exide make 24 V/200 AH. Sealed maintenance free VRLA battery to 1.75 V/cell end cell voltage at 10 hours rate of discharge at 27 deg. C. & consisting of 12 Cells of 2.0 V nominal voltage each with Inter cell & Inter row connectors.

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