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Curtis 1620 Manual
page 1
2.7.3 - Float Mode
Figure 3. Charge profile for Float Mode
Figure 3 defines the charge profile for the Float Mode. In this mode of operation,
batteries are maintained at full charge. In addition to maintaining full charge, the
charger can support a load current – as long as the combined load current and
battery charging requirements do not exceed the output current defined in the
Constant Current setpoint (Icc, default value of 20A in the Basic Mode).
In this mode of operation, the charger will go through bulk charge and Constant
Voltage modes as previously described. It then goes into standby until the battery
voltage drops 0.4V below the Float Voltage (Vfloat, default value of 26.8VDC in
Basic Mode) setpoint. The charger will then reactivate and maintain float voltage
as long as the current requirement is above 2A. If current drops to 2A, the charger
will again enter standby mode. The charger will continue this cycle of standby/
reactivation until power is removed or until the Model 1311 programmer is con-
nected.
Curtis 1620 Manual
page 5