Three phase circuit protection and submersible switchgear automation Case Study Solution The utility selected G&W Electric’s 15kV Trident ® solid dielectric fault interrupters with remote control. These vacuum style interrupters offered electronic relay-emulation curves that provided coordination with other system protective devices. The electronics were able to be placed within the interrupter housing, eliminating the need for a separate submersible control box and cabling. To make the required elbow connections, the utility simply installed transition splices or pulled in new extruded dielectric cable. In addition, the Trident fault interrupters were strategically placed at a circuit tie point, enabling the outage to be back-fed by an adjacent circuit. The interrupter prov

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