Answer Posted / subash chandra bose.a
max.generating voltage in 11kv.
Is This Answer Correct ? | 20 Yes | 24 No |
Post New Answer View All Answers
in dc suppy frequency is zero why? if dc frequency is zero how to exist dc transients and ac transients
Why CBCT rating is 50/1A
63MVA,220KV/6.9KV Transformer LV side neutral is connected to Earth pit through NGR. Whether this earth pit required to connect with near by below grouding earth mat or it is to be kept separate?
explain Density
what happen if the parallel generator phase angle shift by 1 degree in manual mode
What is phenomenon of electromagnetic induction and how it works?
what will happen when the dc supply is given to the capacitor?
Which is the largest hydropower station in the world?
How many turns are there in primary winding? (In Transformer)
plz send me the syllabus or any sample paper for engineer trainee recruitment if any,on ravinder911@yahoo.com
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 to select the isolation tranformer for siemens 802dsl cnotroller
what's the difference between abs/inc encoders. apart from the position remembrance what are all the other differences. and what's mean by grey code.
How to calculate the no of Ceiling fan (1200mm sweep) per unit area?
am commissioning the trafo without connecting the neutral therefore unbalance will occur what is the alternative solution for this?