Equipment category
Switchgear
Site MV/LV switchgear and transformers
Faults (9)
DEP-XFMR-TAPSite stack (generic) · Switchgear solo+Wrong tap leaves undervoltage
Wrong tap leaves undervoltage — transformer tap leaves EVSE bus low under load. site-generic field note: keep evidence s…
SWG-TRIPEaton · SwitchgearFree sampleFeeder breaker trip charging peak
The Eaton feeder breaker serving the depot trips right at a charging peak, taking multiple EVSE units Faulted or fully dark at once — the breaker handle sits mid-trip when you find it, and idle voltage checks looked completely normal before the peak, which is exactly the pattern that sends techs chasing individual charger faults instead of the shared feeder that actually failed.
SWG-GFEaton · Switchgear solo+Switchgear ground fault
Switchgear ground-fault protection trips and takes down the entire depot feed at once — the GF relay or breaker's ground…
SWG-XFMREaton · Switchgear solo+Transformer overtemp
The site transformer serving the depot runs into overtemperature right at charging peak — cooling fans are audibly runni…
SWG-ARCEaton · Switchgear solo+Arc-flash relay trip
An arc-flash relay trip has opened the switchgear and taken the entire site dark, with the light- and/or pressure-based …
SWG-PFEaton · Switchgear solo+Power factor / harmonic trip
Power factor or harmonic distortion protection trips, or the utility flags a power quality complaint, and the timing lin…
SWG-DOOREaton · Switchgear solo+Gear door interlock
A switchgear door interlock is preventing the breaker from closing, or has tripped the gear into an inhibited state, so …
SWG-CTEaton · Switchgear solo+CT wiring reversed after CT swap
A current transformer (CT) was recently swapped and its wiring is reversed — metering, load management, or protection sy…
SWG-UPSEaton · Switchgear solo+Controls UPS dead — gear won't close
The switchgear's controls UPS is dead, so protective relays are dark and the gear cannot be commanded to close even thou…