The Salt River Project (SRP) Hassayampa Switchyard is a 500kV transmission facility with 10 bays, handling power flowing to and from four different independent power producers and several other substations. SRP needed combined instrument/transformer loss compensation and power factor monitoring, plus aggregation and scaling of real-time data. A PowerLogic ION® system from Square D®/Schneider Electric delivered this functionality at an affordable price. Transformer and instrument losses are measured from the secondary side, saving installation costs without sacrificing accuracy. Substation bays operate as four loops, with PowerLogic ION8000 series meters configured as Modbus Master devices, each gathering real-time data from its loop to perform scaling and aggregation before passing values to a central RTU. The network fully integrates with the MV-90 billing system and provides a valuable backup function - if the RTU or communication links fail, the data can be retrieved manually from any meter. When generators go online and merchant sites produce their own power, the breakers close and the meters go offline. Information is shared among authorized users, and advanced security features ensure that confidential data is going only to the right place, and nowhere else.
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