Battery Chargers

TYPES OF BATTERY CHARGERS

The battery chargers marketed by us can be classified into 3 different categories:

Automatic Battery Chargers
Chargers for special applications
Float chargers

AUTOMATIC BATTERY CHARGERS
These battery chargers are used, normally, for charging batteries for cars, trucks, and motorcycles etc. these batteries are usually of 6,12 and 24 volts up to maximum capacity of 120 ampere hour. These battery chargers have provision for providing different voltage outputs and different charging rates for various batteries. The chargers have got boost and trickle controls either in steps or in step-less version. The selection for any charging rate can be easily made through the selection of boost controls and since the chargers have got a tapered slope characteristics, the tendency to get battery over charger is eliminated.

These chargers are housed in sheet metal cabinet painted outside with wrinkle finish on the outer cabinet and plain enameled paint on the front panels. Since the selenium rectifiers. Are used in all these chargers, they provide inherent protection against surges thus ensuring long life of the charger. The use of moving coil ammeters and voltmeter further increase the life of the equipment. The various capacities available with us are

BATTERY CHARGERS FOR SPECIAL APPLICATIONS
Such battery chargers are required for stationery batteries in railways or in telephone exchanges or in other places where the batteries are used to supply energy to a system. These batteries may be used for operating circuit breaker through ancillary power sources in powerhouses or big generating stations. These battery chargers are designed keeping in view the ampere hour capacity of the batteries and the number of cells to be charged. We can always for such applications on request.

FLOAT CHARGERS
In this services, battery in an electric power plant or substation, the charger operates continually (24 hour per day), providing power for both “fixed” and intermittent leads, and maintaining the battery in a state of full charge. To do this, it maintaining the battery in a state of full charge. To do this, it maintains a constant voltage at its terminals up to the limit of its ampere capacity. This capacity must be equal to the average load on the systems plus a sufficient amount to recharge the battery in a reasonable if it should become discharge during an emergency. This latter factory is a matter of choice, but is suggested as being between 5 and 10 amperes per 100 ampere hours of battery capacity.

In such a system the battery delivers any output (assumed to be of short duration, except in emergency) beyond the capacity of the generator, and is automatically recharged when the load is again at normal value. The battery, charger and load are connected directly in parallel.

In a floating battery system the voltage value chosen is one which, through experience, has been found to keep the battery fully charged, but without appreciable overcharge.

For lead-acid types (a specific gravity of about 1.210 is usually chosen for this service) this value is 2.15 – 2.17 volts per cell (129 – 130 volts for a typical 60 cell battery). This is irrespective of the ampere hour capacity of the battery. It also applies to any temperature from the stand point to keeping the battery charged, once it is charge. At low temperatures, however, a discharged battery will recharge more slowly at this voltage, and it is permissible to use a slightly higher value.