EXS
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User Manual 10H52260UM60 - Rev. 1 - 10/2017
This charging method is used for maintaining the battery at full capacity. The float charge voltage is generally low.
This function can be used to compensate for capacity loss due to battery self-discharging, and to recover battery
capacity.
In the case of VRLA batteries, the float charge voltage should be between 2.2V/cell and 2.3V/cell.
4. Automatic transfer to float charge
When the charge current is less than the 'Threshold of Equalize Charge to Float Charge’ value, the charger will
automatically transfer from boost charge to float charge. When the boost charge time exceeds the 'Equalize Charge
Protect Time Limit', the charger will be forcibly transferred to float charge in order to protect the battery.
5. Float charge temperature compensation (optional)
This function must be used together with the battery temperature detection device. The VERTIV battery
temperature sensor is a standard option designed to satisfy your requirements.
6. EOD protection
When the battery voltage falls to the EOD level, the the battery converter shuts down automatically and the battery
is disconnected in order to avoid further battery discharge. The EOD voltage may be set to between 1.6V/cell and
1.85V/cell (VRLA).
7. Battery low pre-warning time
The battery low pre-warning time may be set to between 2min and 30min. The default setting is 2min.
8. Maximum battery discharge time
When the battery is discharged at low current levels for extended periods, it will result in excessive discharge and
may even cause irreparable damage, for this reason it is essential to set-up a maximum battery discharge time in
order to protect it. This limit value is set-up by the service engineer using the VERTIV setting software.
9. Maximum boost charge protection time
To protect against the battery overcharge damage caused by long time boost charge, it is essential to set-up a
protection time a protect time limit This limit value is set-up by the service engineer using the VERTIV setting
software.
Battery Temperature Compensation
The UPS system also features a battery charge temperature compensation function. When the ambient temperature
is increased, the DC bus voltage (which charges the battery) will be reduced correspondingly to provide optimal
charging voltage for the battery, thus prolonging the battery service life time. This function must be used together
with the VERTIV battery temperature detection device (standard option).
1.6
Battery Protection
The following battery protection functions are set by the service engineer using the VERTIV setting software.
Battery low pre-warning
The battery low pre-warning occurs before the EOD. The time can be set to between 2min and 30min.
EOD protection
When the battery voltage falls to the EOD level, the battery converter shuts down automatically. The EOD voltage
may be set to between 1.6V/cell and 1.85V/cell (VRLA).
