tag:blogger.com,1999:blog-29392735.post115519688728753315..comments2022-11-01T11:54:34.314+03:00Comments on Electrical Building Services Design: Diversity and Demand factor..etcDineshhttp://www.blogger.com/profile/12321437621910499070noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-29392735.post-17697351068114731312016-01-04T14:30:53.243+03:002016-01-04T14:30:53.243+03:00For Power & Distribution transformers, conditi...For Power & Distribution transformers, conditions of momentary load, voltage regulation to be satisfied.Anonymoushttps://www.blogger.com/profile/15347392155466443512noreply@blogger.comtag:blogger.com,1999:blog-29392735.post-9785762456575836062012-01-07T17:58:33.591+03:002012-01-07T17:58:33.591+03:00I like this note so much. I'm an electrical st...I like this note so much. I'm an electrical student. Pls can you send this note and more to my email. This is my add. olagab95@yahoo.comGabnoreply@blogger.comtag:blogger.com,1999:blog-29392735.post-8550163905531611672012-01-06T05:24:59.598+03:002012-01-06T05:24:59.598+03:00hi sir..
i'm new in electrical designing..you...hi sir..<br /><br />i'm new in electrical designing..your guide is very useful for me as i dont have any senior engineer in my company to teach me for practical design. I would like to find an PRACTICAL example for complete calculation on how to design building electrical starting from cable sizing & protection from LV side until MV side.<br />I wish that someone can share with me the example of that complete calculation based on experience since most of info i found in google are mostly theory and not the practical calculation for complete electrical system.if i found the calculation, what can i really found just only certain part of calculation, not the complete one.<br /><br />i really need that calculation desperately..my email is hafyzz@gmail.com<br /><br />i am really glad if someone can provide this one.Peacenoreply@blogger.comtag:blogger.com,1999:blog-29392735.post-27261016197662102302011-09-05T17:50:38.062+03:002011-09-05T17:50:38.062+03:00Hi San,
Normally british standard uses Div factor...Hi San,<br /><br />Normally british standard uses Div factors less than 1 wheras US and some European contries use a value more than 1.However the formula remains same, only thing one is the reciprocal of the other.<br /><br /><br />DineshAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-29392735.post-43936630072521891962011-09-02T11:01:25.311+03:002011-09-02T11:01:25.311+03:00Sir,
I am not an electrical engineer, but interes...Sir, <br />I am not an electrical engineer, but interested to know. As you said diversity factor is always >=1, but in ur example as well in others no where i found it is more than/=1?<br />could u pls explain?<br /><br />pavansanhttps://www.blogger.com/profile/03022808379473062607noreply@blogger.comtag:blogger.com,1999:blog-29392735.post-2322859125269247692011-03-07T11:58:05.055+03:002011-03-07T11:58:05.055+03:00good day,
is it possible to have a demand of 9KW ...good day,<br /><br />is it possible to have a demand of 9KW for a 5MVA Power Transformer with 7 units of identical 200-kW pump motors connected?Robert Ranchttps://www.blogger.com/profile/17336489646763584403noreply@blogger.comtag:blogger.com,1999:blog-29392735.post-38797400469564386242011-01-04T06:35:33.585+03:002011-01-04T06:35:33.585+03:00Hi,
I was a lecturer of electrical engineering f...Hi, <br /><br />I was a lecturer of electrical engineering for almost 13 years. My understanding of diversity factor is always greater than 1. Diversity factor can be defined as the sum of the individual maximum demand connected in the system divided by the maximum demand of the entire system. The entire system has its own maximum demand to serve, whereas individual connected load has also its maximum demand to consume or serve.Diversity which is distinguished from diversity factor refers to the percent of time that the machine is running at its demand ( which is always less than or equal to 1).<br /><br />Bernard Bullas, Jr<br />IIEE Life Member<br />IET UK-Member<br />Engineers Australia- MemberBernard Bullas Jrhttps://www.blogger.com/profile/06620101896015312257noreply@blogger.comtag:blogger.com,1999:blog-29392735.post-38720625259198119022010-09-22T00:50:08.383+03:002010-09-22T00:50:08.383+03:00IEEE Std 141-1993 sez: demand factor = the ratio o...IEEE Std 141-1993 sez: demand factor = the ratio of the maximum coincident demand to the total connected load. diversity factor = the ratio of the sum of the individual non-coincident maximum demands to the maximum demand. Maximum demand is the greatest of all demands that have occurred during a 'specified period of time' and coincident demand is any demand that occurs simultaneously with any other demand, also the sum of any set of coincident demands. This business about 'specified period of time' keeps things a bit fuzzy.Unknownhttps://www.blogger.com/profile/13210058679222044862noreply@blogger.comtag:blogger.com,1999:blog-29392735.post-48272803694837926052010-08-24T10:40:24.481+03:002010-08-24T10:40:24.481+03:00My understanding is that diversity factor is defin...My understanding is that diversity factor is defined as ratio of sum of individual consumer maximum demands to system maximum demand at the point of common coupling of these consumers and not as quoted in your note:-<br /> Diversity factor = <br />Sum of individual maximum demands/ Total connected loads<br />= 240 / 300 = 0.8 <br />This is the demand factor. <br />The diversity factor is usually > 1.0. The reciprocal factor < 1.0 is the coincidence factor.<br /><br />Although the general conclusion in your note is correct there appears to be some confusion in the usage of these terms and their definition in the literature.<br />The ratio of average load to maximum demand over a given period or the load factor can also be used in the estimation of maximum demand.<br /><br />HTHenryhttps://www.blogger.com/profile/08853542828333636202noreply@blogger.comtag:blogger.com,1999:blog-29392735.post-92036545457058051252008-09-18T18:26:00.000+03:002008-09-18T18:26:00.000+03:00HiThanks for the information.Will you please provi...Hi<BR/>Thanks for the information.<BR/>Will you please provide the information about, in design of Electrical Panel what is the the relation between Total Connected Load, Max Demand of panel & busbar Current rating selection.<BR/>in short how to design panel when I have TCL & MD.Vijayhttps://www.blogger.com/profile/00214335796589995148noreply@blogger.com