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possibile causees >>>>loose connection , bad contact surface of breaker contact , wrong selection of breaker rating…..
Hi. sir . In your question if noises and over heating appear only recently. my answer is yes. when the tenant of our building starts operating. and we did not change our installation because thats the design of a Proffesional Electrical Engineer. in short a designer of the Electrical in the building.
The size of a wire sir is 250mm². 3-sets
your second question sir what kind of loads are fed by the CB?
The loads that feds in a CB is, Lightings ,Computers, UPS. ACCU's. the tenant sir is a BPO.(Business Processing Outsource)
Actually Sir not a CB but the wire create a over heating and the CB create a noise.
Your third question sir is if i make an infra-red measurement to show the temperature values of a CB? ye sir. i do. and the temperature is 47 degrees celcius. if a the operation of a tenant ( BPO) is full load.
The transformer in my other topic is defferent. the transformer that i ask is the power transformer supplyiing power in a whole building.
thank you sir.
Heat = I² x R
in CB high current is flowing n there is small amount of resistance due to friction and its own resistance. so, whichecer amount of resistance is there and the square of high current is higher, consequently the multiplication result s the heat.
current through a contactor is called electrical system……….
current through a semi conductor is called electronic syste..
Anil
In the UK the quality of the electrical supply system is controled by the National Grid. The National Grid company has a set of standards that it refers to as the grid code. The code is the minimum standard of power quality that a generator supplies to the grid. If the generation does not meet the code it does not go onto the grid.
The code also sets standards for customers equipment if the running of the equipment can be reflected back to the grid. You would not want a factory with a large direct online motor depressing the local supply voltage everytime it is started.
heena said:
hey guys m an electrical n engineering student n i need to make a project abt which m totally clueless…plz suggest smthng n help me out…
hi why dont u try wind mill or energy generation thro solar panel.
u can get some info @ mahaurja.com
ali said:
can anybody please direct me to where i can get standard power factors of various equipment for a hospital? ( example motors,elevators,pumps,refrigirator,medical equipment,kitchen equipment,low current equipment…..
Hi, this is amit kulkarni fm Ahmednagar,maharashtra india,
i do energy audit in various sector such as foundries, cnc shops,machine shops,forging,colleges etc.
power factor =Real power/active power.
to calculate origional PF
u require some data like
1.consumption of instrument in kwh (Ew)
2.consumption of reactive energy in kvarh (Eb)
3.working hrs.(t)
also u must know hp of insrument,rpm,efficiency.
Active energy power (P) = Ew/t.
origional pf = 1/√(Eb/Ew)+1 .
also u need any information @ power factor or energy saving pl mail me on powercop.auditors@gmail.com or powercop.general@gmail.com
Laurent said:
Have you ever been in a situation where a short-circuit occured, involving equipment damages and/or people being injured?
Could you share your experience with others, to re-inforce awareness of the risks & possible consequences?
yes, sort ckt will be the cause of sevier destruction of in strument .
like burnout of instrument
endar said:
it is nice information about PF. thanks
thank sir i get lot of information about the P.F
@Ciprian : you said that you use bus bar system & mounting accessories…and also TeSys U, how do you choose between all these solutions ?
@Paulo, Ciprina, Colin, Sch1 : you talk about TeSys U, in which case is it competetive ?
@all : thank you for your comments !…if you have some pictures to explain more, it should be good ! thanks
I'm Cambodian, I working in Electrical of Cambodia. It is very very important for me about information from neighboring country or worl wide, the formular (or policy) for penalty to the costumers that utilize more reactive energy per month over admisible. Thank for your good ideal. Please sent to chittra.ouk@gmail.com
