Tag
#switchgear
2 topics across all disciplines.
Distribution and the single line diagram — the map of the electrical system
How power gets from the grid to a motor, what transformers and switchgear actually do, why protection must discriminate, and how to trace a supply on a single line diagram.
Switchgear, transformers and protection testing
Why secondary injection proves the relay and primary injection proves everything else, what a reversed CT does to differential and directional protection, why an open CT secondary is dangerous, what breaker timing feeds into, and why phase rotation is checked before anything is paralleled.