Primary process variables such as Current and Voltage from CT, VT/PT are converted to digital format and multiplexed into fibre optical based links which is connected to several IEDs through Fibre optic cable, on Process bus IEC61850-9-2LE protocol.
Process bus enabled Merging units and Numerical protection relays supports HSR/PRP communication protocol as per IEC 62439, integrated with PTP for Time synchronization
At Bay level, all required Numerical protection relays are Process bus enabled.
Protection device ensures auto switchover during failure of Merging unit to healthy merging unit;
100% operability in case of failure of device or connection.
Drastic reduction towards cost of copper cable and civil work.
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