Functional Sector 5A/10A; Trickle-Charging Area 1A - Nortec EL11 Operating Instructions Manual

19-Dec-23
2,55
2,5
2,45
2,4
2,35
2,3
2,25
-35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55
Picture 2:
Temperature compensated charging voltage

1.2 Functional sector 5A/10A

Charging area
- Pre-charge as a constant voltage charge with 28,8V until performing a charge current of 5A or 10A.
- Main charge section I as constant current charge with 5A or 10A until reaching a battery voltage of
28,8V
- main charge section U as constant voltage charge with 28,8V until charging current has decreased to
1A

1.3 Trickle-charging area 1A

The trickle-charging process starts per definition immediately after finishing the charging. The device
supervises the battery until the voltage has decreased to 25,4V. This point is called lower threshold. At
this point the trickle-charge current of 1A (constant) is switched on until the battery has reached the
upper threshold of 28,2V. The device now waits for the off-load voltage to decline to 25,4V and the
process starts again.
Charging curve functional sector 5A/10A
5 / 10 A
28,8 V
28,2 V
25,4 V
1 A
charge
Picture 3:
Typical charging curve (partly discharged, closed lead acid batteries)
© Nortec Electronics 2023
Temperature [°C]
discharge
Operation Instruction EL11
5