NxtPhase Corp. (Vancouver, British Columbia, Canada) announces the successful installation of a 230-V NXVCT optical-sensing system at the Arizona Public Service (APS, Phoenix, Arizona, U.S.) Deer Valley Substation. The system is connected via a low-energy signal to an L-PRO line protection relay and then to a TESLA recorder that compares optical-sensor performance with conventional measurement transformers operating at the same location.

This installation bridges toward a future fully digital system by integrating new technology alongside conventional equipment in the substation.

This system is also designed to demonstrate reliable protective capabilities over the next several years. Key components include two NxtPhase products, the L-PRO and the TESLA, both of which have been selling commercially for several years. The L-PRO line protection relay is connected in a ring bus configuration to protect the high-voltage line. The TESLA recorder monitors signals from both conventional transformers and the NXVCT system, triggering capture of detailed information during specific situations such as switching, system disturbances or faults on the line. TESLA also captures long-term trend data of all signals to demonstrate stability of signals over time.
Circle 181 on Reader Service Card