Generator protection at medium-voltage switchgear must protect more than the stator. The scheme has to distinguish internal electrical faults from abnormal operating conditions, prime-mover problems, excitation failures and power-system disturbances—then trip the correct combination of generator breaker, field breaker, turbine…
A voltage transformer circuit can fail without any primary-system fault. A blown fuse, tripped miniature circuit-breaker, open test switch, loose terminal or broken wire can reduce one or more relay voltage inputs while the power system remains healthy. Unless the…
A neutral grounding resistor (NGR) deliberately limits single-line-to-ground fault current. If the resistor or its connection fails open, the system can become effectively ungrounded and its earth-fault protection may become blind. If it is shorted or bypassed, fault current can…
Cable differential protection is one of the most selective ways to protect a medium-voltage cable. It compares the current entering the cable with the current leaving it and trips when the difference indicates a fault inside the CT-defined zone. The…
A practical engineering guide to medium-voltage capacitor-bank protection, covering bank-specific unbalance methods, CT/VT selection, illustrative settings, trip logic and commissioning tests.
A chronological guide to 31 major international power, electrical and switchgear exhibitions taking place worldwide from September 2026 through December 2027.
A structured engineering comparison of 59N and 64 protection, calculated 3V0, broken-delta voltage, VT requirements, settings, grounding methods, and commissioning tests.
A practical engineering guide to wire numbering in switchgear low-voltage compartments, covering IEC requirements, numbering philosophies, EPLAN implementation, marker selection, quality control and a worked 110 VDC trip-circuit example.
A practical engineering guide to G98, G99 and G100 for solar PV, battery storage, generators and V2G in Great Britain—including DNO applications, protection, export limitation, commissioning and a worked PV+BESS example.
A practical engineering guide to protecting MV incomers, outgoing feeders, transformers, motors and capacitor banks—with function matrices, trip logic, setting principles and official relay application diagrams.
