When a square wave is applied to primary of a transformer then what will be output wave form of secondary ?
Bhel, Sail, Sterling Telecom, TCS,
15 47460Motor also having losses, we call KW rating. In transformer and generator having losses but we call KVA Rating why?
9 14006How the starter control the starting current in three phase AC Motor?(In DC apply the reistance).
6 14051Post New Electrical Engineering Questions
List the time domain specifications.
What range of speed can you get with the field control method of speed control of d.c. Shunt motor?
If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables
what is the practical application of full adder circuit?
How to test the Secure Elite 440 Multi function meter working condition.
Sir, I m 3rd year student 4m DCE and want to do internship in siemens or l&t or any other mnc related to electrical engineering. please tell me the procedure 4 same and oblige me
DEAR SIR,I GOT THE CALL LETTER FROM RRB, SECUNDERABD AS A JE-II SO PLEASE PROVIDE ME SOME MODEL QUESTION AND ANSWER PAPERS AND LAST YEAR QUESTION PAPERS
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.
why ht motors are star connected?
What is the actual calculation for transformer short circuit test?.
what is the purpose of slope in the differential relay?why we are using two slope?but in busbar differential we are using only one slope.why?
What is resolver and glass scale in CNC how they work?
what is the difference between surge protection capacitor and surge arrestor
how unidirectional torque is produced in DC motor?
Which material is used for the core of a transformer and why?
