-
Membership
Career development & professional registration-
Explore this section
Members and registered users
Enhance your career
Professional registration recognises your competence, commitment, skills and experience.
The IET provides guidance and support to enable members to undertake planned and structured Initial Professional Development (IPD) and Continuing Professional Development (CPD).
Professional development courses designed to help individuals and organisations reach and stay at the leading edge of engineering and technology.
The IET Awards reward and celebrate individual excellence, innovation and ambition (engineering scholarships).
-
-
Resources
Library, archives, bookshop, publications & factfiles-
Explore this section
E&T Jobs
Engineering & Technology Jobs
Search today for your next engineering role on Engineering & Technology Jobs, the job board hosted by the IET.
Standards
Code of Practice for Electrical Safety Management
Managing electrical safety effectively is vital in avoiding accidents, delays and unseen costs to your business. IET Standards' newest publication will help non-technical managers manage electrical safety in their organisations. The Code of Practice is now available to pre-order.
Publications
Open access
Open access publishing now available in all existing IET research and letters journals, plus our new fully open access online journal, The Journal of Engineering. Now accepting submissions.
Engineering & Technology magazine
E&T is the leading monthly magazine for all engineering professionals. Its award winning content is available in print, online and on iPad.
-
-
Get Involved
Communities, sectors, volunteers & discussion forums-
Explore this section
MyCommunity
Shape your community. Shape your world.
MyCommunity, the IET's professional network and collaboration platform, enabling you to connect, interact and exchange knowledge with your peers.
Volunteering
Interact with the IET and raise your professional profile
Volunteering can enhance your career development, is a personally rewarding experience and also benefits your Community.
-
-
Events
Conferences, seminars, courses, lectures & visits-
Explore this section
Highlighted events
20 May 2013 | IET London: Savoy Place, UK
11 - 14 June 2013 | Wyboston Lakes Hotel, Bedfordshire, UK
14 June 2013 | IET London: Savoy Place, UK
8 - 10 April 2014 | Midland Hotel, Manchester, UK
-
-
Policy & Media
Thought leadership, media centre & public affairs-
Explore this section
Media centre
IET corporate news and activities, plus comment and reaction on engineering and technology issues.
Read what the media is saying about the IET and our activities.
We can provide independent experts to talk to the media on a range of engineering and technology related subjects.
Advice and support to IET members on promoting IET activities via the media and social media.
Policy
Key topics offer summaries of the IET’s positions on many of the most important policy topics.
The IET represents the views of its members on a wide range of professional and technological issues.
Offering unbiased, independent, evidence based policy advice.
The engineering profession speaking with one voice on key issues relating to engineering.
-
 |
IET |
 |
 |  |
|
search :
help :
home
|
||
|
Latest News:
|
|
|
|
Topic Title: transformer size Topic Summary: question about 100kVA transformer Created On: 16 February 2013 04:55 AM Status: Post and Reply |
Linear : Threading : Single : Branch |
 Search Topic |
Topic Tools
|
 16 February 2013 04:55 AM
|
|
|
Ignoring p.f. for simplicity:
Am I correct in saying that a single phase transformer produces more amps than same sized three phase transformer? for 100kva transformer single phase power = vi 100000/230 = 434 amps in total three phase power = root3 v.i 100000/1.73x400 = 144 amps in total? Is this correct? or am I missing something obvious, like is I actually per phase for three phase? |
|
|
|
|
|
16 February 2013 02:45 PM
|
|
|
Your single and 3 phase currents are correct.
Regards Chris Chew |
|
|
|
|
|
16 February 2013 07:47 PM
|
|
|
three phase power = root3 v.i
100000/1.73x400 = 144 amps in total ???? is the 144 amps for all three phases in total or one phase giving a total of approx 144*3=332 amps in total? |
|
|
|
|
|
18 February 2013 12:49 PM
|
|
|
Hello.
144 amps in each of the three phases. |
|
|
|
|
|
21 February 2013 01:14 AM
|
|
|
thanks for that.... I am surprised by how many electrical engineers dont know the answer to this one.
|
|
|
|
|
|
IET
» Energy
»
transformer size
|
Topic Tools |
See Also:
|
|
| Technical discussion forums |
|
| · | Wiring and the regulations |
| · | Built environment |
| · | Design and production engineering |
| · | Control and automation |
| · | Communications engineering |
| · | Information technology |
| · | Energy |
| · | Transport engineering |
| · | Airfield engineering |
| · | Electronic engineering |
| · | Management in engineering |
| · | Consumer technology |
| · | Other and general engineering discussions |
| Professional and career discussion forums |
|
| · | Feedback and questions |
| · | CEng, IEng, EngTech and other professional registration matters |
| · | Savoy Place Virtual Club |
| · | Student and apprentice discussion forum |
| · | Young Professionals Community |
| Archived categories |
FuseTalk Standard Edition v3.2 - © 1999-2013 FuseTalk Inc. All rights reserved.
