Distribution, panels & emergency power — how electrical power moves through a building.
Fail the normal source, start and qualify a backup generator, and step through a break-before-make open-transition transfer and retransfer.
Inject a fault at branch, feeder or main bus level and compare time-current curves to see which breakers trip and which loads stay supplied.
Compare automatic occupancy/daylight control, manual-on vacancy control and manual dimming in a two-zone office lighting fixture.
Run a DOL starter and a VFD feeder side by side to compare thermal overload buildup, short-circuit tripping and drive frequency ramping.
Follow current from a panelboard breaker through a branch-circuit conductor to a receptacle or equipment load and back on the grounded return path.
Trace electrical service from the utility transformer through the service entrance, switchboard and panel down to a building load.