Samlex-america SCC-30AB Bedienungsanleitung PDF herunterladen (Seite 30)

PRINCIPLE OF OPERATION & FEATuREs

will be less than the programmed Equalization Voltage Set Point displayed on

Screen 6 (Fig 5.3) under “EQU”.

NOTE: Although the charger is in Bulk Stage, the LCD Screen 4 (Fig 5.3) displays “State:

Equalization” and NOT “State: Bulk.”

The Status LED will be steady Orange.

Stage - 2: Equalization Stage. The controller enters this stage at point “C1” from

the previous Bulk Stage when the battery voltage reaches the Equalization Voltage

Regulation Set Point “Ve” and is sustained for a minimum period of around 50 to

55 sec. This stage is timed for continuous / cumulative period of 1/2/3 Hours based

on the programmed type of battery (Please see Table 6.1 under heading “Standard

Battery Charging Programs” on page 43). During the Equalization period (Curve

portion C1 to D1), the battery is in overcharge condition, is gassing and bubbling

vigorously and the electrolyte gets stirred up resulting in removal of stratication.

Also, weaker cells are brought up to full charge too (equalized).

In this stage, the Switch operates under PWM control by feeding pulsing Short Circuit

Current “Isc” with constantly reducing Duty Cycle (< 100% and > 0%) / average current

to keep the battery voltage constant at the Equalization Voltage Regulation Set Point

“Ve” (Curve portion C1 to D1). This is equivalent to Constant Voltage Charging. This is

an intentional, controlled over charge condition for the battery for 1/2/3 Hrs.

Change over to the next Float Voltage Regulation Set Point “Vf” is possible only

after the battery voltage is held at the selected Equalization Voltage Regulation

Set Point “Ve” for continuous or cumulative period of 1/2/3 Hours depending upon

the programmed type of battery (Please see Table 6.1 under heading “Standard

Battery Charging Programs” on page 43). If “Ve” cannot be maintained continuously

/ cumulatively for 1/2/3 Hrs, the charger will NOT exit out of Equalization Stage and

transition to Float Stage will NOT take place.

During this stage, LCD Screen 4 (Fig 5.3) displays “ State: Equalization”. LCD Screen 6

(Fig 5.3) displays the programmed Equalization parameters. Screen 1 (Fig 5.3) shows

the programmed value of Equalization Voltage Regulation Set Point “Ve” under

“BatV”.

The Status LED on the front panel will be steady Orange

NOTE: During Equalization Stage, if the load current is more than the current from the solar

panel, the battery voltage will drop. If the battery voltage drops around 1V below the

Equalization Transition Voltage Set Point “Ve” for around 1 min, the controller reverts to Bulk

Stage with 100% Duty Cycle. The LCD Screen 4 (Fig 5.3) will still display “State: Equalization”

and the front panel Status LED will still be steady Orange. It will revert to PWM when the

battery voltage reaches Equalization Transition Voltage Set Point “Ve” and is sustained for a

minimum period of around 50 to 55 sec.

WARNING!

Once Equalization Stage is activated, it will not exit this Stage unless the there is adequate

charging current from the solar panel to charge the battery up to the programmed Equalization

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Samlex-america SCC-30AB Bedienungsanleitung Seite 30