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  • Ungrounded Wye | Information by Electrical Professionals for Electrical . . .
    Ungrouded wye and delta are the same thing The only thing different is the transformer secondary is wye and left floating rather than delta; everything else is exactly like an ungrounded delta Very common This allows for one transformer stock to cover both 277 480 grounded wye customers as well as 480 volt customers seeking an ungrounded system The bond strap is simply removed from the XO
  • Ungrounded Delta | Information by Electrical Professionals for . . .
    I have occasion to run across 480v and 240v ungrounded systems in manufacturing facilities that I work at 240v ungrounded delta if I take a meter phase
  • Ungrounded delta system | Information by Electrical Professionals for . . .
    I’ve recently realized the station we are working at (additional construction) Operates from 480v ungrounded delta system As many others I’m sure that I just never knew about than but have Just learned about recently And I understand that even if a phase fails nothing with happen with an
  • Ungrounded Delta 480V 3-Phase 3-Wire System - Mike Holts Forum
    I have a project where the existing pad mounted utility transformer is configured as delta-delta The utility company says it is an un-grounded delta secondary at 480V 3-phase 3-wire system I asked them to take voltage readings between phase-phase and phase-ground just to make sure it is an
  • Ungrounded 480x240 delta to delta 3ph 3w voltage to ground reading
    Thank you for your feedback If you are blowing fuses and breakers anywhere on the ungrounded 240 V delta, it means you normally operate every day with faults to ground on the floating delta and the fuses only blow for the second ground fault (so it's actually a line to line fault through two shorts in series)
  • Line to ground readings on ungrounded delta secondary
    Ungrounded delta secondary 480V three phase Electrician took readings on factory equipment and on line side of main breaker Utility company also got the same exact readings on secondary of transformer 480V to ground on phase A 480V to ground on phase C 0 V to ground on phase B We
  • Ungrounded System Vs Corner Grounded System | Information by Electrical . . .
    A 3P3W system can be either corner grounded or ungrounded For the corner grounded configuration, we are allowed to use distribution equipment with 2 pole OCPD that only disconnects the ungrounded conductors So suppose we have such a system, and change the supply from corner grounded to
  • Re-Identifying UNgrounded conductors | Information by Electrical . . .
    You stated that you do not allow ungrounded conductors smaller than #4 to be re-identified, re-identified as what? Do you have an example? Re-identification of a white conductor to an ungrounded conductor only applies to cables
  • Ground (fault) detection detectors for ungrounded systems
    We service several older electrical systems that are 480 volt 3 phase systems, some 240 volt systems, that are fed from our Poco by 3 wire ungrounded systems (I've mentioned this in other posts) Our customer gear is rated 3 phase-3 wire 100 and 200 amp meter sockets are 5 jaw The systems





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