Rectifiers / Battery chargers

Operating principles

A rectifier transforms alternating current (AC) into direct current (DC). Its normal function is charging batteries and keeping them in optimum conditions while, at the same time, providing DC power for other loads. Consequently, it’s essential that the unit takes into account what kind of batteries it’s feeding (Pb or NiCd) when operating.

It works automatically and continuously evaluates the status and temperature of the batteries and other system parameters in order to guarantee stable voltage and low ripple.

It can incorporate load disconnection manoeuvres for the end of autonomy, thermal-magnetic distribution, fault localisation, grid analysers, etc.

Battery charge limits and levels

With sealed Pb batteries, only two current levels are used (float and charge), while three are used for open Pb and NiCd batteries: float, fast charge and deep charge.

• Float: for maintaining the battery when already charged depending on the temperature.
• Fast charge: Done in the shortest time possible to restore capacity lost by the battery during discharge; at limited current and final voltage of stabilised charge.
• Deep charge or deformation: Periodic manual operation to equalise the battery elements; at limited current and final voltage of stabilised charge. Done in a vacuum.

Shift from float to fast charge and vice-versa:

• Automatically: when current above a specified value is suddenly absorbed, adjustable. And the opposite, after the absorbed current drops.
• Manually (optional): pushing a local / remote button.

General features of the device 

• Complete, automatic wave rectifier
• High power factor at input, up to 0.9
• High output voltage stability, rippled up to 0.1% RMS
• High performance, simplicity and reliability
• Can be used in parallel with other units