Darrah Electric Company has been involved with the design, development and implementation of numerous products
and solutions sold into the Utility Excitation / Generation industry for a number of years.
Drawing from experience gained in other industries, Darrah has pioneered the implementation of the “Draw-Out”
range of Exciter Frame Bridges. This topology allows any number of bridges to be paralleled, using standard
building blocks. Additionally the draw out approach allows Bridge maintenance to be performed without the
need to shut down the system.
Darrah offers air cooled SCR bridges to 4,000 Amps, 1100 Volt, continuous rating, in draw out designs.
Darrah provides a drop in replacement Air Cooled Three Phase Diode Bridge and 5-Pole Disconnect Switch for
the aging GE Alterrex™ water cooled excitation systems. The Diode Bridge and switch are state of the art
designs that directly mount to the original equipment cubicle (doghouse) using existing mounting rails and
A.C. and D.C. bus bars. This conversion eliminates the maintenance, reliability and safety issues associated
with existing water cooled diode rectifier bridges while meeting and exceeding D.C. voltage and current