Electrical Network Configuration.....

6 comments

Rate

lightning.arrester Associate Join Date: Aug 2008 Location: Dubai, United Arab Emirates. Posts: 38	Electrical Network Configuration..... 10/25/2009 8:18 AM
	Hi All, I am somewhat aware that the main power source (i.e. Public Grid/ D.G. Set/ Captive Power Plant) of a standard electrical network is in 2x100%, 3x50% & 4x35% configuration. Can anyone explain me what is the reason behind it? Thanks in advance. Regards.
	Register to Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

These comments received enough positive votes to make them "good answers".

electricalexpert65 Guru Join Date: Oct 2009 Posts: 2061 Good Answers: 169	#1 Re: Electrical Network Configuration..... 10/25/2009 10:23 AM
	Don't you see the logic? In 2 x 100%, in case one power source fails, the other will be able to take the full load on its own. Similarly in 3 x 50%, if one power source fails, the other two will be able to take the emtire plant load on their own. So also, in 4 x 33% (not 4 x 35%). But, the investments can be justified only for very critical processes. Suggested further reading: "Design of Electrical Systems for Large Projects" by Mr.N.Balasubramanian, Rukmini Publishers, Chennai. India.
	Register to Reply Good Answer (Score 2)

lightning.arrester Associate Join Date: Aug 2008 Location: Dubai, United Arab Emirates. Posts: 38	#2 In reply to #1 Re: Electrical Network Configuration..... 10/26/2009 8:32 AM
	Hi, first of all thanks for your reply. Please check below if my understandings are right. In 2x100% configuration, both sources will be 50% loaded and would be capable of taking the whole 100% load if anyone fails. In 3x50% configuration, two sources will be 50% loaded each and remaining one source would be reserved as standby and capable of taking the load of one main source if anyone fails. In 4x33% configuration, three sources will be 33% loaded each and remaining one supply source would be reserved as standby and capable of taking the load of one main supply source if anyone fails. And Please let me know if there are any other standard configurations. Thanks and Regards again.
	Register to Reply

electricalexpert65 Guru Join Date: Oct 2009 Posts: 2061 Good Answers: 169	#3 In reply to #2 Re: Electrical Network Configuration..... 11/01/2009 4:50 AM
	To correct you: In 2 x 100% configuration, both TRF will be in parallel operation and shall share the load equally (i.e.) 50% of the total load each. In case, one TRF fails, the other TRF will be able to take the entire 100% plant load on its own. In 3 x 50% configuration, all the three TRF - in parallel - will be in parallel operation sharing the total load of 100% into 33% each. In case, one TRF fails, the other two TRF will now share the total plant load into 50% each. In 4 x 33% configuration, all the four TRF - in parallel - will share the total load into 25% each. In case one TRF fails, the reamining three TRF will now share the plant load into 33% each. Hope it is clear now. However, the most popular configuration is 1 x 100% only.
	Register to Reply

Anonymous Poster #1	#4 In reply to #3 Re: Electrical Network Configuration..... 06/30/2011 6:09 AM
	Dear Are you saying that transformers are working in parallel,if in parallel then your fault level will be very high,Generally in India parallel operation are not in practice.In 2 x 100% configuration one TRF will be working and other one will be standby or both the TRF will share 50% load but will not be working in Parallel depends upon once system concept.
	Register to Reply

electricalexpert65 Guru Join Date: Oct 2009 Posts: 2061 Good Answers: 169	#5 In reply to #4 Re: Electrical Network Configuration..... 06/30/2011 7:31 AM
	How long have you been working in India? I have been working for the past 28 years in Indian Industrial Electrification Projects as well as in O & M of the same. I have commissioned 'n' number of systmes with similar configurations. Pl. study the book I have referred to in my first reply. When I reply a query I do a thorough search.
	Register to Reply

PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#6 In reply to #2 Re: Electrical Network Configuration..... 04/22/2025 9:39 AM
	<...In 2x100% configuration...> one source could be up to 100% loaded and the other could be on standby in case the other fails. <...In 3x50% configuration...> two sources could be each up to 100% loaded individually and the third could be on standby in case one of them fails. <...In 4x33% configuration...> three sources could each be up to 100% loaded individually and the fourth could be on standby in case one of them fails. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
	Register to Reply

These comments received enough positive votes to make them "good answers".

Copy to Clipboard

Anonymous Poster (1); electricalexpert65 (3); lightning.arrester (1); PWSlack (1)

	Got Something to Say?
	Ask a Question Start a Discussion

	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 (67 right now) Show Members