Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted /
| Is This Answer Correct ? | Yes | No |
Post New Answer View All Answers
What is the difference between cheque and demand draft
Where are the windows update files stored?
What are the applications of database management system?
What is the difference between jsp and php?
What is the difference between linux server and solaris server?
To use Spark on an existing Hadoop Cluster, do we need to install Spark on all nodes of Hadoop?
What is rating?
DEAR SIR PLEASE SEND ME QUESTION OF JUNIOR ENGINEER ELECTRICAL IN RAILWAY EXAMS.singh.shobhag@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.
What are the uses of ribbon?
How respond to state transitions on your app in ios?
Which is higher - the cost of equity or the cost of debt, and why?
What is ajaxcontrol toolkit?
What do you mean by cascading style sheet?
How do I share an excel file for editing?
