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What is the differance between negative dc voltage and positive dc voltage because some circuit uses -24,-5,-12,- 15,volt dc supply
eLab, Hero Honda, NTPC, Suzlon, Teradyne,
10 37529hi plz send me reliance placement papers..i.e electrical technical papers that have been asked in reliance test.
3002In step down transformer (415/200V),mistakenly secondary side is connected to 415V for some hours, what would be result of this condition?
Essar, GAIL, Vizag Steel,
19 29919In any Industry, Which voltage level either 3.3kV or 6.6KV to be chosen? Then I would like to know ,Is there any cost consideration or Rating of motor?
5 11529what r the advantage of selecting micro controller type tripping of circuit breaker than relay type tripping?
BARC,
5 9402Post New Electrical Engineering Questions
Discuss the effect of sudden loading of an induction motor
how to erect roof control panel?
what is meant by LCR meter? where its useful ?
Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?
What is creepage distance..... what will be the value for different voltage level
diff b/w elcb and rccb
1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.
What is the difference between Delta & Wye windings?
What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.
What are the causes of having an rmu explode after installation? And how do u treat the bushings of an rmu?
What does a Bode plot tell you?
How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.
how can motor both beasrings insulation resistance can be check?
what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?
What is the capacity of the Fastners 12mm?
