Rectifiers / Battery chargers

OPERATING PRINCIPLES, CHARGE LIMITS AND LEVELS AND GENERAL DEVICE FEATURES

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

Data sheet

CARACTERÍSTICAS

Entrada: Monofásica 220 VAC, + 15%, – 20% – Trifásica 220 / 380 / 400 VAC, + 15%, – 20% – Frecuencia 50 / 60 Hz, ± 5% – Factor de potencia hasta 0,9

Salida: 24 / 48 / 110 / 125 / 220 VDC, ± 0,5% – De 10 a 10.000 A – Rizado hasta 0,1% r.m.s. – Rendimiento hasta 94%, según potencia

Opciones: Baterías de Pb ó NiCd – 6 ó 12 pulsos – Filtro anti armónicos – Redundante – Operación en paralelo con otras unidades – Antisísmico Clase 1E – Cuadros de distribución de salida – Cuadros de maniobra – Detector de faltas a tierra – Localizador de faltas a tierra – Analizador de redes – Adaptación a normativas diversas (MIL, UL, …)

Diseño: Armario metálico autoportante – Protección IP20 a IP54 – Color RAL 7032 (típico)

Todas las características anteriores pueden adaptarse bajo demanda.