STANDBY - POWER BATERIES

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INDUSTRIAL

• MAINTENANCE

In order to obtain maximum service of your Exide Stand-by cells you only have to follow the following simple maintenance rules,

General Condition of the Equipment

It is most important to maintain the cells in a good clean condition; humidity or electrolyte spillage could cause leakage paths.Check the tightening of metallic parts and regularity smear them with pure petroleum jelly.

Ensure that gasses can evacuate correctly through the vent-plugs, if needed, wash or replace them.

Check the electrolyte level of each cell of your battery. In no event should the liquid be below the minimum level or above the maximum level. In the event of the electrolyte being below the average level, restore it to the level by addition of distilled or deionized water only

ELECTROLYTE:

In a lead acid cell, electrolyte ploys an important role in the reactions occurring during the charge and discharge, thus has an impact on the life of the cells.

We indicate minimum and maximum marks or the containers to ensure the best possible service therefore the level should be maintained between those two marks.

Going below the minimum mark, the electrolyte concentration increases abnormally and leads to destructive action of the plate group.

Going above the maximum level, relative gravities become too low, the cells capacity can be affected.

Checking State of Charge of Cells and Electrical Control:

It is easy to check the state of charge of the cells by reading the electrolyte gravities.

A completely charged cell must have a gravity of 1.240 +/- 0.01 at the average level and 1.210 +/- 0.01 at the maximum level & 1.265 at minimum level at 25⁰C.

The reading of inferior gravities on all cells shows a lock of charge.

In the case of constant current charging, the value of this current in amps must be equal to 7% of the rated capacity in AH. Under those circumstances, a completely discharged cell will require approx.16 hours to charge. In case of double-taper charge, the maximum acceptable values are 14% of the rated capacity as long as the voltage is below 2.30 volt/cell, then 7% of the capacity until the end of charge parameters. This type of charge requires about 10 hours. lf the battery is used in parallel with a constant voltage rectifier and with permanent power supply to circuits.

Maximum out put to the battery is limited to 14% of C 10.

The floating voltage after a mains failure must be within 2.25 and 2.30 volt/cell.

The equalizing voltage (for the rectifer equipped with this type of manual switch) must be 2.40 minimum.

The values indicated above are given for a service in premises where the average room temperature is within 18⁰C and 25⁰C.

The re-charge in equalizing voltage must be carried out or if possible, whenever you add water in order to obtain a good mix of electrolyte (and nevertheless) every 6 months at least.