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Converter Station Gas-Insulated-Substations Calibration enervac

Whitepapers second communication hierarchy introduced in the 2004 standard was the process bus as defined in IEC 61850-9-1 (point to point unidirectional) and IEC 61850-9-2 (multipoint bidirectional) for the purpose of communication between the protection and control bay level devices and modern instrument transformers installed at the primary apparatus in the switch yard.

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