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 Categories >> Engineering >> Electrical Engineering
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Question Asked @ Answers Views     Select
why gravels is used in transformer yard?    6  7646
What is the Difference Between the SCADA & PLC ? Both it also control and Supervise Then what Special in Scada & PLC?    1  1666
WHAT IS DIFFRENCES DCS & PLC essar   1  1259
power inverter we are using 2n3773 power transister in that places we can use any IGBT ? essar   1  2085
what is tha between elcb & rccb? essar   3  2248
In 6600/√3/110/√3v voltage transformer,how much output voltage in open delta transformer,after removing 1-phase of primary side on transformer?    0  364
what is the use of vcb & isolator in substation?    4  9572
what is the use of vcb & isolator in substation?    0  621
How reverse power relay sense the power is reverse in the system.    2  3315
Name of Hydrocarbon gases.    1  1285
Which types of Gases occure when mineral oil burnt    1  1012
what is the formula to calculate kva genset required for a given load in kw.    3  6219
how can we use isolator as breaker    3  1588
upto how much low RPM we will run the commercial motor which is run through VFD without any problem occurs in motor.Motor rating Duty is S1 & RPM is 1400. abc   0  491
How can we calculate the power factor of an electrical appliance ? Is there any formula ? Is there any meter around to calculate it ? And how to use that meter ? thanks philips   2  2756
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Un-Answered Questions
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what will happens if one phase is missing for 33/11kv power transfomer and why? 1003
how to measure dc earth leakage current? 1240
How can claculate to attain the desired PF in the line ( HOW Much KVAR is required ) Pls Give the formula? Equate Petrochemical 0 1 how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec. 0 1 What will happened. if we feed 3phase supplay to the stater with out insert the rotor. How much current will flow through the stater winnding? Equate Petrochemical 0 1 What is required of exietation to the alternater. 0 1 why star point of HT motor not earthed? Equate Petrochemical 0 1 Why we are getting low voltage in star connection? Equate Petrochemical 0 2 What's ND relay & it's functions? Equate Petrochemical 0 2 How instantanious short circuit current is calculated? its formula? Equate Petrochemical 0 2 What is servo Motor? What's the advantages of this motor over Induction motor? Equate Petrochemical 0 2 What is core CT & it's function? Equate Petrochemical 0 3 what is meant by star/delta voltages as 440/220 in a 3 phase induction motor, and why it should be connected on STAR IN 3 PHASE SUPPLY L & T 0 4 What is required of exietation to the alternater. KNB 1 23 what is the design voltage for 6.6KV 2000 KVAR HT capacitor? Consultancy 0 3 Pls explain about vfd control?Where it is used, Give some example? siemens 1 22 Please explain me abt PQ diagaram in the power sector. 0 9 397
which IS or IEC is used for earthing,breakdown voltage of transformer oil, hv/pd testing and all type of electrical testing 885
Help need in transformer !? Hello Friends The parameters of 2300/230 v 50hz t/f is R1=0.286 ohm R`2=0.319 ohm Rc=240 ohm X1=0.73 ohm X`2=0.73 ohm Xm=49.2 ohm Secondary Load impedance ZL=0.387+J0.29 solve the exact equivalent circuit with normal voltage across primery.. I know every thing but i cant find CURRENT I1=? and I`2=? Please help me give solution or only Formula please please... 326
if 12v battery get discharged for 2 months after if we put charge it will charge again?how much time it will take to charge? 260
how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt 553
Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection? 319
in conventional fan regulators how the current varies with speed? 324
A generating system will have a total capacity of 300 MW. Find the probable forced outage when the capacity is supplied by two 150 MW units. The operating probability of all units is P=0.98 and forced outage probability rate Q =0.02 . 4
why T/F winding temp measurement cts are odd secondary current ie,109A/1.2A/1.4A? 26
What is Servo Ventilated Motor? 381
can you send me the placement papers of electrical engg. from companis like NTPC,DRDO,IOCL,HPCL,BPCL etc.?If,plz send as soon as possible.Thanks. 415
What is the importance of counter based plan & how is it scheduled? 354
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