If Neutral Broken in Single Phase Consumers Distribution

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alnashadh Active Contributor Join Date: Jun 2009 Location: Sri Lanka Posts: 16	If Neutral Broken in Single Phase Consumers Distribution 02/15/2012 6:34 AM
	If the 3 Phase TT distribution radial system is connected to number of single phase consumers where P-N is 240V & P-P is 415V. Please assume that there are 2 of single phase consumers call Consumer-A & Consumer-B for easy explanation. Assume that consumer-A is tapped to R phase & Neutral; consumer B is tapped with Y phase & Neutral. As you all aware in consumers A & B supplied with 240V AC (P-N). Now think that Neutral conductor has been broken apart from Consumer A & B (The broken conductor is not between consumer A & B) Now my problem is what will happen to in this circuit when both consumers powered equipments? Note: I think that when both consumers (A&B) powered an electrical equipment, closed loop will become with 415V Phase to Phase supply (R-Y). and it will be a serious problem. What do you all thinking here?
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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	#1 Re: If Neutral broken in Single phase consumers distribution 02/15/2012 7:11 AM
	Contact the supply company to have the neutral link reinstated as a matter of urgency on safety grounds. In the meantime, disconnect both users from the supply and do not re-energise until the neutral link has been reinstated by the supply company. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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alnashadh Active Contributor Join Date: Jun 2009 Location: Sri Lanka Posts: 16	#3 In reply to #1 Re: If Neutral broken in Single phase consumers distribution 02/16/2012 3:28 AM
	I want to know that whether I am correct or not where P-N is 415V or 240 when Neutral has broken???
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raghun Power-User Join Date: Jan 2010 Location: Hyderabad Posts: 343 Good Answers: 22	#4 In reply to #3 Re: If Neutral broken in Single phase consumers distribution 02/16/2012 5:15 AM
	Al Nashadh, You are right. The Phase-to-Neutral voltage can go as high as 415V (in place of 240V). The actual magnitude is decided by relative impedances of loads connected to each of the phases. __________________ Raghunath
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TonyS Guru Join Date: Aug 2010 Location: Resting under the Major Oak Posts: 4347 Good Answers: 181	#2 Re: If Neutral Broken in Single Phase Consumers Distribution 02/15/2012 8:29 AM
	I thinking "why are you wasting time asking questions on here?" Get the supply company involved before someone is killed! __________________ The reports of my death are greatly exaggerated.
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arifkunnath Commentator Join Date: Oct 2011 Posts: 95	#5 Re: If Neutral Broken in Single Phase Consumers Distribution 02/19/2012 12:50 AM
	I had experienced a neutral missing in single phase consumer. When I checked with a neon tester, it was indicating but because of no neutral availability , circuit was not complete and equipments were not working. But when I missed the neutral in 3 phase supply consumer. I got 415V instead of 230V and lost many lamps which was switched on during that time.
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joseph sithole Active Contributor Join Date: Oct 2009 Posts: 24	#6 Re: If Neutral Broken in Single Phase Consumers Distribution 02/24/2012 9:55 AM
	If you are not an electrician just switch off power to these consumers and call an electrician investigate what happened to the neutral link IMMEDIATELY TRUE VOLTAGE WILL RISE TO 415 Vt depending on the impedances of connected load.PLEASE!!!!!!!!
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