Installation, commissioning and operating instructions

5.12.2 Commissioning charge with constant current (I characteristic curve) or decreasing current

(W characteristic curve)

The maximum permitted currents can be obtained from Tab. 5–6.

Characteristic curve

I characteristic

W characteristic curve at

2.0 V/Cell

2.4 V/Cell

2.65 V/Cell

Charge Current

5A

14 A

7.0 A

3.5 A

Tab. 5–6: Max. permitted charge currents in A per 100 Ah C

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battery capacity for I and W charging

Charging must continue until

– all cells have reached a minimum of 2.6 V

– the electrolyte density ceases to rise over a further period of 2 hours.

Then switch to the float charge voltage as specified in the operating instructions.

5.12.3 Extended commissioning charge

Extended storage or climatic influences (humidity, temperature fluctuations) reduce the charge state of the cells. This makes an extended commissioning charge necessary.

Conduct the extended commissioning charge according to the following procedure:

1. Charge at 15 A per 100 Ah C

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2. Charge at 5 A per 100 Ah C

3. Interrupt for an hour.

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until 2.4 V/cell is achieved (approx. 3-5 hours).

for 14 hours (cell voltage will exceed 2,4 V/cell.

4. Charge with 5 A per 100 Ah C

10

for 4 hours.

Repeat items 3 and 4 until all

– cells have reached a minimum of 2.6 V

– the electrolyte density in all cells has risen to the nominal value of ±0.01 kg/l and these values cease to rise for a further 2 hours.

Subsequently switch to the float charge voltage as set out in Chap. 6.2.4.

5.13 Electrolyte level check

If the electrolyte has been set below the upper level before commissioning top up with sulfuric acid to bring electrolyte level to the upper electrolyte level mark.

5.14 Electrolyte density adjustment

After commissioning is complete, if the electrolyte density is too high, replace a portion of the electrolytes with demineralized water according to DIN 43530 Part 4 or IEC 60993-1.

The electrolyte density in the individual cells must not differ more than 0.01 kg/l between cells. In case of large deviations, conduct an electrolyte density adjustment and subsequent equalizing charge according to the operating instructions.

Installation, commissioning and operating instructions for vented stationary lead-acid batteries

7140203152 V1.2 (09.2015)

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