Sharing Abstracts,Notes on various Electrical Engineering Topics.
September 20, 2015 17 Comments
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Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical). He is FIE ,MIE and CEng from Institution of Engineers, India. He has more than 25 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). He is Presently associate with one of the leading business group as a Sr.Manager at Ahmedabad, India. He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”, “Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics.
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JIGNESH PARMAR
Thank u
Thanks for your post. i need one clarification, as per calculation sheet, down conductors are not varying while changing the height of the building. Is height of the building considered for down conductors
Definitely Change.
Collection Area Ac=(L x W) + 2 (L x H) + 2(W x H) + 3.14 H2
Where H=Height of Building.
You need to enter Proper Value of Maximum Acceptable Overall Risk Factor …
Is it the area protected by the lightning arrester?
Hello Sir,
My Self is Nethra, am working in Electrical consultancy field as an Design Engineer. I need some clarification regarding FRLS wire. In Residential , Apartments all are using FRLS wire , i just wanted know what is reason behind that. Is there any IS standards for that?? Plz do the need full. Am awaiting your reply.
Warm Regards , Nethra
Sir,
My self is Eswaran and working in HT maintenance. I need numeric relay settings and minimum settings of relay. which one is the best among the relays.
with regards
eswar
Thank you very much Mr. Jignesh
Best Regards, Sony Francis Ele. Design Engr. Kuwait National Petroleum Co.
Sent from my iPhone
>
Hello sir,
IS 694 : 2010 is for ” POLYVINYL CHLORIDE INSULATED UNSHEATHED
AND SHEATHED CABLES/CORDS WITH RIGID AND
FLEXIBLE CONDUCTOR FOR RATED VOLTAGES
UP TO AND INCLUDING 450/750 V
( Fourth Revision )” . It defines all wires in 2 categories FR ( Flame retardant ) & FR-LSH ( Flame retardant Low smoke and halogen) . The FRLS category is under commercially available category Between FR and FR-LHS.
Dear sir
i need some clarification for arc gap in between two rods of lightning arrester that could be used for a 11 kV transmission lines
1)The space in between two metal rod will give a capacitance effect or it will act as a resistance
2)what standards could i follow for getting accurate results for calculation of arc in between two metal rods
3)what will be the change in the density of arc (electrical parameters) when it sparks out from leading electrode and when it reaches the end electrode after ionising the air molecules when a lightning strike occurs directly lightning strokes and if lightning hits the transmission line( please provide guidance such that it would be useful for my carrier)
Dear Sir,
Please mail me OHSAS practices docs or general safety required in Transmission & Distribution (rural electrification) work.
Dear Sir
Dear Sir,
A building structure height is 95 meter and a vertical air termination lighting protection is provided at top. will it cover 95meter in circle at an angle of 45 degree…..
Dear sir,
Greeting!!!
A building structure height is 95 meter and a vertical air termination lighting protection is provided at top. Will it cover 95 meter in circle at an angle of 45 degree..
Kindly Change the heading to “Lightning”. Presently its “Lighting”
IS 2309 has been replaced by IS IEC 62305.
Hi
I need help to design Lightening protection system as per IEC 62305.
If anybody is having template / procedure to prepare design document please share.
Rajendra
Hello Sir,
I need some support regarding earthing. We are working in Smart City Proejcts in which we are installing various equipments at city junctions, red lights, footpaths, divider etc.For teh same we are doing chemical earthing (with 1.2 m rod) nearby the equipment. We found equipments failure which may be due to earthing issue. Our problem is that when we measure earth resistance there its coming 60-70 ohms. It may be due to conductivity between electrodes while measuring as well as improper earthing as its surrounded/covered by concrete/bitumin etc.
Please advise how we can ensure proper earthing either going by another method for functionality of equipment as well as acceptance by OEMs how to measure or any equivalent parameter which we can show in place of earthing resistance.
Regards,
Ashish Kumar