Abstract
In order to reduce short-circuit level in a power augmentation generation project in an oil refinery, it installed a duplex reactor as an alternative solution when comparing to usual techniques. Duplex reactor concept was born in the beginning of XX century, and its application is similar to conventional series reactors: limiting system maximum short-circuit current to match rated equipment short-circuit duty, protecting personal and electrical installations. However, in some electrical networks, duplex reactors have best performances than conventional ones. Selection of duplex reactor instead of other classical options is discussed in this paper. Technical and economic characteristics about the duplex reactor are also presented along this paper