Storage

If the batteries are to be stored for six months or more they will need a supplementary charge prior to installation as outlined in Section 3.If the batteries are not to be installed immediately,keep them boxed and stored in a cool, clean and dry place.

Unpacking and InspectionIf

any batteries are lower they will need a supplementary charge prior to installation.of charge/discharge to achieve 100% capacity.volts/cell (still healthy condition). Full performance will not be achieved unless the battery is full and freshly recharged- it may take up to 5 cycles nominal voltage) when the battery age is less than 10 weeks. If battery is more than 10 weeks old, the open circuit voltage (o.c.v.) could be<2.1 Measure the battery open circuit teminal voltage which should be >2.1 Volt/cell (o.c.v. respectively 12.6 Volts for a 6 cell battery, 12 Volt distortion of the case and terminals.While uppacking each battery , take care not to drop anything on the terminals. Inspect each battery for physical damage such as cracks ori.e. batteries, cables, shroude etc.Inspect the battery consignment for obvious signs of transport damage.Ensure the consignment has all items listed on the advice note or invoice, Danger: Batteries are electrochemically live at all times.Do not short circuit the battery terminals.

Supplementary chargeb

The battery open circuit voltage is less than 2.1 volts per cella) The batteries have been in storage for more than 6 months or more, lastest after 9 months age from the date of production.Apply supplementary charge if:To ensure maximum service life a supplementary charge may be required prior to installation.

Pre-installation Check listDanger:

Batteries are electrically live at all times. Do not short circuit the battery terminals.
Under no circumstances should batteries be charged in a sealed container.
The batteries in a UPS should be installed in a dry aadequately ventilated area with an operational temperature between 20C and 25C.
Caution: Battery operational temperature over 25C can have a severely detrimental effect on battery service life.

Installation and Connection

When fastening flexible connectors provided to battery terminals a correctly adjusted insulated torque wrench must be used.
When working on batteries, remove all jewellery, watches and rings.
If rings cannot be removed, insulate with 3 layers of insulating tape.
When connecting the batteries, free air space must be provided between each battery block.The recommended distance is 5-10 mm minimum.
Since a battery may generate ignitable gases, do not install them close to electrical switches or any components that may produce sparks.
The battery case is made from ABS resin, do not place in an atmosphere with organic solvents or adhesive material.
In order to avoid tracking to each and creeping currents between the battery and the installation racks within UPS-systems at voltages of serial
connection greater than 60V, it is recommendable to insulate each tier by a polypropylen coating.
In high voltage systems the resistance between battery and stand should alwaysbe greater than 1mΩ.
An appropiate alarm circult could be incorporated to monitor any current flow.

Single string battery connection
When multiple numbers of batteries are being used, makeconnections as follows:

Positive Termination
Connect the positive terminal (+) of the battery NO.1 securely to the positive terminal (+) of the charger or load.

Intercell Connections
If the equipment is negative-earthed connect final battery negative terminal to the rectifier/load. If the equipment is positive-earthed,connect
final battery positive terminal to the rectifier and/or load.
Make all remaining inter-row and inter-tier connectors progressively.
Finallymake all remaining positive(or negative) connection to rectifier or load.

Negative terminalConnect the negative terminal (-) of the final battery securely to the negative terminal (-) of the charger or load.

Multiple string battery connection
Make all interbattery block connections as being explained before.Follow the same procedure for making all connections to a commonearth first,
then finally the opposite polarity connection.Connect the positive termination cables together through a battery breaker or isolator switch.

the following table shows the recommanded torque setting for termianal nuts and bolts

Charging
After connecting the battery system a float charge voltage needs to be applied.This voltage may be calculated from the figures in the table
below (for operational temperatures above 20 C, the float charge voltage should be reduced by (-3mV/ C).
Float Charge Voltage at 20 C : 2.275+/-0.005Volt/cell
These values will be high enough to compensate for the battery’s self discharge and keep the battery in a fully charged condition.
It should be noted that after applying the float charge voltage, full battery capacity might not be available for 24 hours.This period allows
for a charging and battery voltage equalization.
Effect of temperature on Float Charge Voltage and Battery Life
Caution: high operational temperature will have a severely detrimental effect on the battery life.This is also shown in the table below

Setting a Cut-Off Voltage
Towards the end of a battery discharge the voltage will begin to fall below its nominal value. To prevent over discharging the battery system a cut-off voltage needs to be set.
Caution: The minimum cut-off voltage is 1.6 volts/cell to prevent possible permanent damage and reduction of service life.

AC Ripple Current (the AC component on the DC charge current)
Ideally, to obtain maximum service life of the battery, the value of measured AC ripple at R.M.S. on the DC charge current should be Zero butby all means not greater than 0.1 C (Amps).

Inspection and Maintenance
To prevent battery problems, the inspection and maintenance procedures outlined need to be implemented. During annual service inspections,log the voltage readings per battery block and make them accessible to VCELL. This will act as a historical battery system record
which will assist in the early detection of possible system problems before they have a chance to develop (Voltage log sheet on request available from V-CELL).

Additional Notes:
1. Constant current and constant power discharge data of the VC series are taken at 20C battery temperature. These are nominal values and thereby guaranteed.Typical values,however, may exceed the nominal ones, guaranteed for, by up to 30% for individual battery typesunder the same test conditions and can be readily made available on special request.
2. The estimated service life of the VC series is about 3-5 years and can be achieved under optimal service conditions provided that thebattery is permanently kept on float-charge of 2.275V/cell ±0.005V/cell at 20 C and that the ripple current does not exceed 0.1 C (A)
3. The maximum service life can only be obtained by float-charging at the correct voltage, which is temperature dependent.Temperaturecompensation is required in order to avoid overcharge at high temperature and undercharge at low temperature. The recommended
temperature compensation factor is -3m V/cell/ C with reference to a standard temperature of 20 C
4. Owing to a rising internal resistance of the batteries at temperatures below 20 C,it is recommended to increase the float-charging voltage by +3Mv/cel/ C
5. At temperatures above 20 C, the service life of the battery will be diminished even if temperature compensated float-charging is applied.
6.In order to avoid thermal runaway, it is mandatory to temperature-compensate the float-charge voltage by -3Mv/cell/ C for temperatures above 40C.
7. In order to achieve the optimal service life of the VC series please respect the separately published installation, operation and maintenance instructions.