Need Protection in My System

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sumairali Active Contributor Join Date: Feb 2014 Posts: 11	Need Protection in My System 02/21/2014 11:42 AM
	IN OUR SYSTEM WE HAVE TWO 3MW GENERATORS & ALSO WE HAVE GRID WHICH IS PARALLEL WITH THOSE GENERATORS AT 11KV BUS. WHICH ARE FEEDING STEP-DOWN TRANSFORMER FOR LV BUS. I WANT YOUR SUGGESTIONS TO APPLY PROTECTIONS IN THIS SYSTEM. & IF THERE INTERLOCKING REQUIRED IT MORE GOOD FOR ME. *NOTE: ALL VCB'S & ACB'S HAVE EARTH FAULT & OVER-CURRENT PROTECTION.
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	Pathfinder Tags: PROTECTION REQURED

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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: Need Protection in My System 02/21/2014 12:32 PM
	Threat alert! Threat alert! Threat alert! Threat alert! Threat alert! Threat alert! Threat alert! HIRE A CONSULTANT, TODAY!!!! TAKE NO ACTION YOURSELF! YOU ARE OBVIOUSLY NOT QUALIFIED TO DESIGN OR WORK ON THESE SYSTEMS!!!! HIRE A CONSULTANT, TODAY!!!! Don't do, or touch, anything!!!
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sumairali Active Contributor Join Date: Feb 2014 Posts: 11	#2 In reply to #1 Re: Need Protection in My System 02/21/2014 11:26 PM
	we have already hired but i want to add some more protections in it... on transformer our consultant only add Earth fault & over current protection...what other protections we will add???it is 3500kVA transformer...
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#3 In reply to #2 Re: Need Protection in My System 02/21/2014 11:42 PM
	Well, I'd recommend some suspenders of the proper capacity. That will help control the droop on let-down and up-take. I'd say 5000 is a good number. Over current may be an issue, but if it is late, it can be compensated for by the pre-trip circuit. Do you need scamatics for this?
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sumairali Active Contributor Join Date: Feb 2014 Posts: 11	#5 In reply to #3 Re: Need Protection in My System 02/22/2014 1:05 AM
	thanks for the prompt reply,yes lyn i want the schematic & kindly guide me if differential protection suited for this or not???
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ramvinod Guru Join Date: Jun 2007 Location: chennai,India Posts: 592 Good Answers: 19	#4 In reply to #2 Re: Need Protection in My System 02/21/2014 11:43 PM
	It can be done for a fee. If you are interested please contact __________________ Ramesh,Freelance Electrical/automation Consultant
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sumairali Active Contributor Join Date: Feb 2014 Posts: 11	#6 In reply to #4 Re: Need Protection in My System 02/22/2014 1:07 AM
	yes RAM i want the standard protections in this system, if you guide me to compete with my consultant & give him hard time i am very thankful to you.
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TonyS Guru Join Date: Aug 2010 Location: Resting under the Major Oak Posts: 4347 Good Answers: 181	#7 In reply to #6 Re: Need Protection in My System 02/22/2014 4:34 PM
	Why do you think people would act as consultants to your company for free? You have a consultant, get him to earn his fee. If you don't like his recommendations get rid of him. It's quite simple, for professional advise you should expect to pay. __________________ The reports of my death are greatly exaggerated.
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shivvaram Associate Join Date: Jan 2009 Posts: 44	#8 Re: Need Protection in My System 02/27/2014 10:12 AM
	Dear Sumairali, Your requirement of protection design can be handled by me. Please contactme at +919500032082 Ramesh.A
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lyn (2); ramvinod (1); shivvaram (1); sumairali (3); TonyS (1)

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