Battery Chargers

DESCRIPTION

Battery Chargers are basically Automatically Stabilised D. C. Power Sources meant to feed the connected load and simultaneously trickle (float) charge the connected Battery, thereby maintaining it (Battery) continuously healthy & ready to feed the load in an emergency situation of A.C. Supply failure. This arragement ensures an uninterrrupted D.C. Supply to the connected load at all times - by the Battery Charger in case of A.C. Power Supply availability or by the Battery in case of failure of A.C. Power Supply.

Battery Chargers are non standard products, meaning that they conform to the varied specification / requirements of the Consultants / Clients.

Battery Chargers draw power from the A.C. incoming supply, through a step-down Transfomer converted into D.C. by Rectifier, which (D.C.) is continuously & automatically maintained constant, under all working conditions, by employing controlling devices of either Thyristor (SCR) or Magnetic Amplifier or Servo-motor, associated with soild state control circuitries.

Features
• Automatic stabilisation of D.C. Output Voltage within ± 1% (or even ± 5%) of the set level, irrespective of A.C. Supply fluctuations and / or load current variation, both with in the specified limits.
• Inherent automatic load current limiting (settable) / output voltage sharp drooping characteristic to safeguard the Battery Charager from damage by automatically passing the overload to the Battery.
• Auto / Manual mode selection facility.
• Soft start to minimize inrush current into Battery on Unit Switch-on.
• Minimum ripple content - less than 1% (or lower) absolute or less than 4mV Psophometric as desired.
• Protection against A.C. & D.C. voltage transients.
• Low Noise level.
• Constant Voltage / Constant Current working selection, if desired.
• Protections against single phasing and rectifier fuse failure, by automatic unit tripping.
• Optional Protection and / or Alarms for D.C. under / over voltage, Earth Fault, A.C. under / over voltage, any other.
• A.C. / D.C. Metering (analog or digital) & Switchgearing, as desired.
• Maximum Effciency & power Factor (min. 0.8 lag).
• Fast response & correction.
• Duty Cycle Continuous.
• Life expectancy : 20 - 25 years.
• Easy maintenance.
• High reliability.
• Reasonable short time overload capacity.
• Suitable for lead-acid or nickle-cadmium Batteries.

Types of Battery Chargers
• Float Rectifier.
• Float Charger.
• Boost Charger.
• Float cum Boost Chareger, with / without dropping devices.
• Combination of A Float Charger and A Boost Charger.
  Two Float cum Boost Chargers, with / without switching arrangement.
  A Float Charger and a float cum Boost Charger.
  Any other desired combination.

NOTES :
• The above Battery Chargers working off single phase or three phases A.C. Supply as required (or as feasible based on unit capacity.
• The above Battery Chargers with any desired controlling device : Thyristor or Magnetic Amplifier or servo-motor.
• The above Battery Chargers combined with integral or separate D.C. Distribution Boards - Compartmentalised or Non - Compartmentalised - with incoming / outgoing feeders (switches or MCBs or MCCBs.)

Ratings of Battery Chargers
• D.C. Voltage : Suitable for any Battery 12V or 24V or 36V or 48V or 110V or 220V or any other.
• D.C. Current : Any, ranging from 5A to 800A.

Specifications
• As per specification of consultant / client.

Ordering Information
• System D. C. Voltage
• Battery Ampere-Hour capacity
• Connected D. C. Load in Amperes
• Incoming A. C. Supply Voltage, single phase or three phase, with fluctuation limits.
• Type of Battery Charger.
• Application
• Accessories/Facilities, if required
• Any other special feature required.

Mechanical Construction
• As per Specification / requirement of the consultants / clients.
• In case of absence of the above :
Construction Welded angle iron structure, covered by louvered removable panels on sides top and by hinged doors in front / rear.
Overall Size Relevant to Battery Chareger capacity & type and desired accessories / facilities.
Finish Professional 7 - Tank pre-treatment process with oven baked enamel paint
(epoxy paint on request)

Application
• Communications
• Power Houses
• Switchyards
• Pertochemicals
• Cement Plants
• Steel Plants
• Anyhere for uninterrupted D.C. supply.
• As a part of the UPS Equipment
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