DISCOVER Tubular Gel OPzV Manuale operativo - Pagina 4

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Depending upon storage conditions, storage time may be limited. In order to prevent batteries from becoming over

discharged during storage do not store them for more than 3 months at 20°C/68°F , 2 months at 25°C/80°F , or 1 month at

40°C/104°F before performing a re-fresh charge. Failure to observe these conditions may result in significantly reduced

capacity and service life.

• Record dates and conditions for all charges during storage.

2.3 Unpacking and Handling

• Never lift cells by the terminal posts. Lifting cells heavier than 25 kg/55 lb should be made with lifting belts

• Never drag or roll the battery!

• The batteries are fully charged before shipment. Do not short circuit.

• Check for evidence of leakage. All cells with visible defects should be rejected

3. Installation and Commissioning Charge

3.1 Installation and Battery Room Design

• All electrical protective measures, devices, accommodation and ventilation of the battery installation area must be in

accordance with all local rules and governmental regulations.

• The battery should be installed in a clean and dry area and protected against dropped items and dirt.

• Avoid placing the battery in a hot place or in direct sunlight.

• The location or arrangement of cells should result in no greater temperature difference than 3°C/5°F between cells within

a connected string at any given time.

• Avoid conditions that result in spot heating or cooling, as temperature variations will cause electrical imbalances in the

battery. For better cooling and temperature management ensure the installation allows for adequate air flow around

each cell. Keep 10mm/0.5in distance between cells.

• The layout of the battery room or installation area must allow for easy access to the batteries. The recommended minimum

distance between battery rows is 1.5 times the depth of the row.

• Racks or cabinets shall be located 100mm/4in from the wall.

• Be sure to provide adequate space and lighting for inspection, maintenance, testing, and cell replacement. Space

should also be provided to allow the operation of lifting equipment and for taking measurements (cell voltage and

temperature) during service.

3.2 Racks and Mechanical Stability

• Approved and insulated battery racks are recommended for proper installation. Calculations should be performed to

ensure that floor loading capabilities are not exceeded. Seismic forces should also be considered.

• The installation should provide for adequate structural support and exposure to the minimum possible vibration.

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3.3 Cells in Parallel Strings

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Tubular Gel cells may be connected in parallel to increase capacity, current capability and/or discharge durations. In

the case of each parallel connected string, only use batteries of the same voltage, capacity, design and age.

The resistance and ampacity of the cables or connector bars in each string must be the same, e.g. same cross-section, same

length and same conductor type (copper, aluminum). In addition, each string should be equipped with disconnect capabilities

(circuit breakers) for maintenance and safety purposes.

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recommends a maximum of four strings parallel, up to 10 strings is possible: If the following steps are fulfilled

it is possible to have more strings in parallel without reducing battery life or cells getting out of balance if the following

requirements are fulfilled:

• The same voltage drop must be realized from each string to the end connection (load and ground). This can be achieved

by proper choice of cable lengths, cable diameters and arrangement for crosswise connection configurations

• The connector cables for positive and negative terminals of each battery string must have the same length

• It is a must that each string has a manually operated switching device that also automatically opens or breaks the circuit

in the event of an over current (circuit breaker).

• Each string must have the same number of cells

• Each string must be exposed to the same heat or temperature potential.

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