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We normally make oil soak pits under Transformers. Oil from soak pit goes to collection pit. We provide granules/pebbles under transformers. My question is weather granules/ pebbles to be filled in soak pit or not? if yes upto what level?
Bhel,
10450why two point starter,three point starter, four point starter cannot be used for A.C machines?
2 4706Which of the following loss varies with the load A hystresis loss B eddy current loss C copper loss D core loss
1 3916In auto transformer if power transferred inductively and conductively are same, the ratio of output/input voltage is A 1 B 0.7 C 0.5 D none of above
2 10709kVA rating of open delta connected transformer is _____% kVA rating of delta/delta connection A 50 B 70.7 C 57.7 D 75.7
2 4954Scott connection is used for A 3-phase to 2-phase conversion B to achieve higher effciency C to save copper D to reduce harmonics
2310Post New Electrical Engineering Questions
in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?
Explain the working principle of Synchronous Generator and Assynchronous generator?
what is the advantage of connecting capacitors in delta than in star?
What is minimum permicible value of leackage current for LT Panle when applying voltage up to 3 KV for 5 Minuits?
What will be the voltage impact on secondary side of two transformers with different vector groups when both voltages are compared.
H.t motor 6600 volt to same motor lt supply 440volt supply applyed to h.t motor to effect....
Comment on the working principle of operation of a single-phase transformer.
1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.
How you will determine the volume of oil in a particular Distribution transformer.
what is Anti-pumping?
what are the pecularity of shaver sockets ?
How to use computer cpu ups use for home inverter circuit board
I have 4 busbar of 1000 ampere. we use 4 busbar to make 4000 ampere in one phase.my problem is that when we applied 60% load on that then busbar produced high noise.what is the reason of that and how can i minimize that noise.
what is the prinsiple of dc motor and construction and working ,application of dc motor.
whati s the sludge current in ups
