Hi all, Anyone know what BIL (basic impulse level) is, and how it relates to say a 132/22kv power transformer or 22kv overhead line? Regards MAhesh ... Dear...
768
sedat aksoy
sed2at
Jul 4, 2006 8:38 am
Hello everyone; Simply; Why a transformer draws high inrush current when it is connected to an AC source at first time.? What is the level of this current? ...
769
manas_r42
Jul 6, 2006 1:53 am
At the time of switching on,a transformer draws inrush current because of the predominance of magnetising impedance.At start only the resistance plays till...
770
Metropolitania
starcity2u
Jul 6, 2006 1:53 am
Hi ... the inrush current due to magnetize the core/winding, and theoritically can be as high as 15x full load current. It lasts very short, so ensure the...
771
aziz_melhim
Jul 6, 2006 1:59 am
Dear, that is simply because the transformer is an inductive load, and that is the transient state...
772
wahyu pamungkas
wahyupamungkas
Jul 6, 2006 2:01 am
Mukesh, I don't know what you mean with " how to calculate Earth Fault Current" since I just know the formula to determine the maximum fault/prospective fault...
773
wahyu pamungkas
wahyupamungkas
Jul 6, 2006 2:02 am
I aggre with ravi1871j04. I install motor for coal reclaiming at 10 Hz-25Hz driven by VVVF. The manufacture suggest different drive fan for cooling the ...
774
aziz_melhim
Jul 6, 2006 2:03 am
Hello all, any one know how can i built soft starter?...
775
idongesit archibong
zarchidong
Jul 8, 2006 3:34 pm
mark empson, i just want to use this chance to commend you so well for all your efforts you have been a great resource fellow thanks and pls keep upo with ur...
776
idongesit archibong
zarchidong
Jul 8, 2006 3:45 pm
i need to know the latest trends in transformer protection also how to inprove power factor archibong mohd amer <amer_2000ae@...> wrote: hi in refrence...
777
bijanzahedi2004
Jul 9, 2006 4:11 am
Would please let me Know a procedure for determination of equivalent circuit parameters of Capacitor-Run Single Phase Induction Motor? Thanks very much for...
778
freakychakkar
Jul 9, 2006 4:25 am
I HAVE A MACHINE IN WHICH AN INDUCTION MOTOR IS USED. THE PROBLEM IS AFTER SOME TIME THE MOTOR SUDDENLY BREAKS WITH A JERK IN THE PROCESS BREAKING MAJOR...
779
rn_kastury
Jul 9, 2006 1:15 pm
... equivalent ... To determine equivalent circuit parameters of Single Phase Induction Motor you will need to have a more complex test set up than that ...
780
rn_kastury
Jul 9, 2006 1:24 pm
... PROCESS ... It seems tjhat the motor is overlaoding and pulling out. What is the application? Check the voltage at THE MOTOR TERMINAL - does this fall...
781
rn_kastury
Jul 9, 2006 1:30 pm
... If your application is a shaft mounted centifugsl device - like a fan / blower or water pump - then you can reduce power consumption at lower voltage -...
782
tmempson
Jul 10, 2006 7:00 pm
Hello aziz_melhim The soft starter is both a simple device and a complex device. It is simple in that it is essentially like three light dimmers, one in each...
783
tmempson
Jul 10, 2006 7:46 pm
Hello rn_kastury This would be correct if the speed of the induction motor fell significantly when you reduced the voltage however in reality in all but very...
784
tmempson
Jul 10, 2006 7:46 pm
Hello freakychakkar Can you please provide greater detail on the installation, what type of machine, how is the motor controlled, what is the size and what is ...
785
R N KASTURY
rn_kastury
Jul 11, 2006 1:43 am
... wrote: Hello Mark Empson I ageree with you entirely on the effect of voltage on losses etc. There is no gain in reducing / increasing voltage - it may ...
786
ab_ariyaratne
Jul 11, 2006 6:47 pm
There are some more products supposed to be reducing the electrical power consumption.Enercon System (USA),Mini Sun Power (Singapore).Could some one...
787
tmempson
Jul 11, 2006 7:22 pm
Hello ab_ariyaratne This has been a discussion point for almost 30 years since Frank Nola of NASA first came up with the concept of reducing the iron loss of ...
788
tmempson
Jul 12, 2006 7:32 pm
Hello R N Kastury Yes I do agree with you that you can reduce the energy consumed by a variable torque load by slowing it down, and I also do agree that you ...
789
vasan61_prabhu
Jul 17, 2006 11:06 am
IN INDIA USE THE 50HZ SUPPLY, BUT IN U.S.A. USE 60HZ. INCREASE THE FREQUENCY LOSSES IN THE LINE INCREASES. BUT THE USA CHOOSE 60HZ INSTEADEAD OF 50HZ. WHAT ARE...
790
anant shevlikar
anant_eep
Jul 17, 2006 5:01 pm
Actually the frequency of genration depends on the speed of the rotor and no. of poles of alternator. If we increase the rotor speed & no. of poles, frequency...
791
crisanto eva
crisanto_eva@...
Jul 17, 2006 8:30 pm
But in UK and most of Europe, they use 50Hz so I think the reason behind is not only economy... If you increase the frequency, the impedance also increases... ...
792
sakthi vadivel
sak_40in
Jul 18, 2006 5:11 am
In aircrafts 400 hz frequency is used to reduce the size of the apparatus, may be the 60 hz frequency also will reduce the size of apparatus for the required ...
793
becoo sdfsd
becoo20
Jul 18, 2006 12:47 pm
Dear all i have two type of Open fuse cutout loadbreak and non- loadbreak whats this mean ? Thanks __________________________________________________ Do You...
794
udb65
Jul 19, 2006 12:14 pm
Can anybody convey the links for manufacturers of stator rotor starters in India?...
795
bala senthil
saidaibala
Jul 19, 2006 1:09 pm
load break can be used to open or close a circuit on- load. non-load break used to open or close a circuit only under no load or in other words,it is not...
796
ansab tp
ansab_tp
Jul 20, 2006 5:47 am
hi friends any body know the details of hand punching system? __________________________________________________________ Yahoo! India Answers: Share what you...
