Previous in Forum: Generator Neutral Earthing   Next in Forum: Inverters and Batteries
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
3 comments
Rate Comments: Nested
dg1961
Active Contributor

Join Date: Feb 2010
Posts: 16

HV Transformers and Loads

02/08/2010 11:36 AM

What is the difference between An OFF Load & ON Load Tap changing In a HV Transformer (Rating 1600KVA) & which one is better.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
wareagle
Guru
United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#1

Re: HV Transformer

02/08/2010 12:12 PM

http://en.wikipedia.org/wiki/Tap_(transformer)
Register to Reply
msamad
Guru

Join Date: Feb 2009
Location: Houston, USA
Posts: 946
Good Answers: 244
#2
In reply to #1

Re: HV Transformer

02/08/2010 5:42 PM

Off-Load Tap Changer: To operate this type of tap changer, the transformer has to be de-energized.

On-Load Tap Changer: The tap changer can be operated with transformer keeping energized.

The Off-Load Tap Changer is simpler and less expensive than the On-Load one but the service continuity is not maintained during the tap change.

If the system voltage fluctuates very often and the service continuity is important, the ON-Load should be the choice of selection.

The following links may be further help:

http://nptel.iitm.ac.in/courses/IIT-MADRAS/Electrical_Machines_I/pdfs/1_15.pdf

http://www05.abb.com/global/scot/scot252.nsf/veritydisplay/c1256b3c00492da6c1256ae2003f9b3e/$File/1LAA101003AAEN_Large-Distribution-Transformers.pdf

http://canteach.candu.org/library/20030803.pdf

http://cr4.globalspec.com/thread/12215

http://cr4.globalspec.com/thread/13006

- MS

__________________
 "All my technical advices in this forum must be consulted with and approved by a local registered professional engineer before implementation" - Mohammed Samad (Linkedin Profile: http://www.linkedin.com/in/msamad)
Register to Reply
Dickson
Power-User
Engineering Fields - Power Engineering - New Member

Join Date: Nov 2009
Location: Abuja, Nigeria.
Posts: 126
#3

Re: HV Transformers and Loads

02/09/2010 7:42 AM

In On Load, U can Tap Change with the transformer On Load.

In off load , U have to switch off transformer load load b/4 Tap changing.

Dickson

__________________
 There is peace in silence and achievement in plans.
Register to Reply
Register to Reply
Have a Different Question?
3 comments
Copy to Clipboard

Users who posted comments:

Dickson (1); msamad (1); wareagle (1)

Previous in Forum: Generator Neutral Earthing   Next in Forum: Inverters and Batteries
You might be interested in: Taps, Bus Plugs, Guides Bushings and Drill Bushings

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (97 right now)
Show Members
Advertisement