General Description

Cigentec SCR battery chargers and DC Power systems are of proven reliability and require no maintenance.

Components used in the construction of our units are selected on a basis of reliability, durability and commercial availability. This ensures that the equipment will always give the user dependable service but if for some reason a component should need replacement, it will normally be available as a shelf item from most electrical or electronics wholesalers in major centers. Naturally components used in our equipment are always available from our plant.

Cigentec SCR Battery Chargers can be built to most requirements simply by adding and combining various existing options modules. In the rare cases where it is needed, we can specially develop circuits to perform any desired function.

Cigentec offers you a great deal of flexibility in packaging also: in addition to the standard sizes and con figurations of cabinets listed herein, we can design any type of cabinet you may require, including free standing types with battery compartment.

Cigentec cabinets are finished in ASA61, light grey enamel. Other colours and special paint & finishing standards are available on application.

For information on Cigentec equipment not contained in this leaflet please consult the factory or your local representative.



Stand-by or main power and battery charging for the following applications:

  • Communications

  • Switchgear

  • Power Stations and Substations

  • Control Panels

  • Stationary Engine Starting

  • Marine

  • Custom Power Systems


AC Power Circuit:

AC Power is applied through an input breaker or a switch and fuse, to the primaries of the power transformer and the control transformer.

DC Power Circuit:

The secondary voltage of the power transformer is rectified by a full wave bridge rectifier; the rectified voltage is applied to the charger's output terminals through a fuse and an internal or external ammeter shunt.

DC Output Control and Monitoring:

The control and monitoring module is divided into five different sections, all incorporated on a single printed circuit; these sections are grouped in the dashed line rectangle above and provide the following functions:

  1. Power and phase reference: this section is powered by the control transformer and provides power to the other four sections, as well as timing to the SCR firing section;

  2. SCR firing section: this section provides a gate signal to the rectifier SCRs when it receives instruction from the voltage or the current monitoring sections;

  3. Current monitoring section: this section instructs the SCR firing section to limit the Output current to the present value as soon as the maximum allowable current is reached;

  4. Voltage monitoring and regulating section: This section continually measures the Output voltage; when the voltage drops below the calibrated value, it instructs the SCR firing section to raise the voltage to the calibrated value; when the voltage increases beyond the calibrated value it instructs the SCR firing section to lower the voltage to the calibrated value;

  5. Polarity monitoring section: This section constitutes a safety feature when the charger is initially turned on; if the battery is connected in reverse polarity, this section instructs the SCR firing section not to fire the SCRs.