A practical forensic workflow for relay COMTRADE and event records: verify scaling/time, reconstruct fault sequence, calculate phasors and sequences, identify CT saturation and breaker performance.
A practical MV motor-relay setting guide covering full-load current, starting curves, ANSI 49/48/51LR/46/50/50G/37/66, RTDs, contactor versus breaker and VFD applications.
A practical transformer-protection workflow covering ANSI 87T, REF/64, 50/51, 49, 24, mechanical protections, CT compensation, inrush stability and commissioning.
How inverter-based resources change MV fault current, direction, sequence quantities, ride-through, island protection, coordination and adaptive relay-setting strategy.
A step-by-step MV selectivity-study workflow covering TCC curves, min/max faults, grading margins, fuse tolerances, breaker times, cable/transformer damage and arc-flash trade-offs.
An engineering comparison of PRP and HSR for protection networks: topology, DAN/SAN/RedBox devices, zero-recovery behavior, failure modes, timing, testing and selection.
How IEC 61850 process bus works in MV switchgear: sensors, merging units, Sampled Values, timing, network architecture, redundancy, quality supervision and end-to-end testing.
A practical IEC 61850 GOOSE engineering guide for MV switchgear: publisher/subscriber design, datasets, VLAN priority, supervision, fail-safe logic, testing and SCL control.
A complete protection and control philosophy for main-tie-main MV switchgear: open-transition ATS, undervoltage logic, interlocks, synchronism, bus faults, source transfer and testing.
Practical trip-circuit supervision design for MV breakers: monitoring in open and closed states, resistor and binary-input checks, dual trip coils, DC supply and commissioning.
