Conventional chargers refer to all 50 Hz chargers. They transform the high mains voltage down to a lower AC voltage on the secondary side using a large heavy transformer on the primary side. A rectifier turns the 50 Hz alternating current into a direct current for the traction battery. This is not a pure direct current and voltage, but it pulses slightly. This is called ripple voltage and causes the humming noise in the charger and battery.

Mains voltage fluctuations on the primary side of the transformer cause corresponding fluctuations on the secondary side, which can cause the conventional charger to trip. During the transformation process, turnover losses occur in the form of useless heat, so electrical efficiency is relatively low. In other words, more electrical energy goes into the primary side of the conventional charger than comes out on the secondary side, but the user pays full price.

Depending on the capacity of the conventional charger, the normal charging time for a battery that is 80 percent discharged is roughly somewhere between 7 and 14 hours. If sufficient charging time is always available, a cheaper, smaller charger will suffice, otherwise a larger and more expensive one should be chosen, this does depend on the quality of the charger and the charging characteristic

Traditional single- or three-phase battery chargers, equipped with a WA charging system, meaning they provide decreasing current and increasing voltage. The compact dimensions facilitate use in confined spaces. The charging process is fully automated thanks to an electronic controller card, which manages the entire charging cycle and indicates different phases or deviations via LED and DISPLAY.

These chargers are ideal for fast and safe charging of forklifts, scissor elevators, aerial work platforms, industrial cleaning machines, golf baby carriages, large ships,…