This charger was designed and built for a special experimental battery research programme. The charger is 414/440V 3-phase input with output of 620V at 150A and 60V at 150A. Because of the specialised nature of the research, additional interfacing had to be developed so that the charger could be controlled by means of an external computer via a network link and internal PLC, which was supplied by the customer as an assembled unit. Feedback from the charger was also made available so that a closed-loop control system could be implemented.

The two separate DC outputs are entirely independent of each other, and are fully floating from the mains supply earth. All doors on the cabinet are fully interlocked to prevent access while the unit is running, and a comprehensive monitoring system was provided for the customer to allow any fault conditions to be detected.

100kW Charger, 620V @ 150A and 60V @ 150A DC.

Once the control services had been implemented, it was also possible to provide for a fully manual set of voltage and current controls on the front panel, using multi-turn wirewound potentiometers with digital dials. Forced air cooling is used internally for the thyristors and blocking diodes, while the conventional mains isolation/stepdown transformer and smoothing chokes are natural convection cooled. All components are rated continuously.

The charger is approximately 2metres high and 1.3metres wide. The panel meters are DIN 96mm, weight is just over 1 ton. We will put additional information on the unit on the website as soon as time allows, including some of the construction details and photographs. The charger is built around a steel box-section framework with detachable/hinged panels. A top canopy it fitted to allow cooling air to exit and to prevent dust and debris from entering. Cable entry is by two side sets of pre-punched holes plus additional holes in the base of the main chassis.

An additional set of control panel cutouts and sub-panels were fitted on the right-hand door in case of future expansion by the customer, but they are presently blank with all controls on the left-hand door. An emergency shut-down button is fitted on the door, which is part of a shutdown loop to enable the charger to be stopped either by the operator or by an internal fault. The loop has external wiring facilities to enable the shut-down to be enabled remotely.

Contact us: Phone: +44 (0) 1933 356666 Fax: +44 (0) 1933 355557 Email: prepair@easynet.co.uk
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