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Electronic VT in AIS Application
EVT in AIS application is composed of the following three parts:
Capacitor voltage divider: The capacitor voltage divider converts high voltage into low voltage signals and sends them to the remote modules for processing. It also can be used as a communication carrier device.
Dual remote electronic modules: Dual remote electronic modules are located at the low voltage side. They receive and process the output signals of capacitor voltage divider. Remote electronic modules produce series digital optic signals as their output.
Merging unit: Merging units are placed in control rooms to receive three-phase voltage signals. The output of merging units is sent to the protection and control devices using IEC60044-8 or IEC61850- 9-2 protocols.
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