What CT class would you recommend for transformer differential protection under IEC 61869?
Looking for field experience on saturation margin, knee-point voltage and matching CT ratios for a 225/33 kV transformer differential scheme.
Explore technical insights, learning resources and conversations across energy and infrastructure.
Looking for field experience on saturation margin, knee-point voltage and matching CT ratios for a 225/33 kV transformer differential scheme.
MV collection system, inverter and transformer sizing, and the 33/225 kV grid connection study are now complete.

A practical review sequence for assumptions, device curves, operating scenarios, selectivity margins and the final engineering record.

Preview a structured workflow for calculation inputs, scenarios, results and engineering traceability. Capabilities shown as preview until validated for release.

Example of how a public opportunity can present scope, disciplines and deadlines while keeping applicant-only details protected.
DEMONSTRATION CONTENTBuild a clear foundation in protection principles, relays, coordination and engineering practice through structured learning.

A short overview of evidence, responsibilities and hold points—without replacing the approved project procedure.
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