1.3 TRANSITION BETWEEN CHARGE MODES
The device can apply 3 different charging voltages. These are Float, Equalize and Boost Charge
charge voltages. When in auto charge mode, the device automatically switches between Float and
Equalize charge modes.
Float Charge Mode
In this charging mode, the device applies Float charging voltage to the load (battery), limiting the
current if necessary. There is no time limit. The float charge charges the battery at buffering value.
Equalize Charge Mode
In this charging mode, the device applies the Equalize charging voltage to the load (battery),
making current limit if necessary. There is no time limit. The Equalize charge is a fast charge which
is high in the battery charging process.
Boost Charge Mode
In this charging mode, the device applies Boost charging voltage to the load (battery), limiting the
current if necessary. This charging mode is also limited in terms of time with the Boost Duration
setting value. If this time expires, the device returns to Float Charge and Fast Charge is blocked for
the next 1 hour. After 1 hour, the device switches itself to Boost Charge again.
The quick charge is used only for the first commissioning for some special types of batteries.
Automatic Charge Mode
In a rectifier set to operate in automatic charging mode, automatic switching between float and
balancing charges is done automatically. These criterias are current value and time. As a current
criterion, two threshold values are mentioned: Flotation Current and Equalize Current. As a time
criterion, there is only one value called Boost Duration. All three values can be set by the user under
the Settings menu. The mechanism works as follows:
1. If the current value drawn from the battery is below the Float currrent set value, the device
switches to Float Charge mode within 30 seconds.
2. If the current value drawn from the battery is above the set value of the Equalizing Current, the
device switches to Equalizing Charge mode within 30 seconds. However, this can be done if at
least 60 minutes have passed since the last successful Fast Charge
3. If the device has entered Equalize Charge mode for any reason, Equalizing Charge can last as
long as the Boost Duration value, after which the device will go into Float Charge mode if the
device is still in Equalizing Charge mode and start the 60 minute Fast charge Block period
mentioned in the second item. As long as fast charge block is active, the device can not switch
to Equalize charge.
