Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. What do you mean by Phase Sequence?
It is standard practice in the United States to designate the phase A-B-C such that under balanced conditions the voltage and current in the A-phase lead in time the voltage and current in the B-phase by 120° and in the C-phase by 240°. This is known as positive phase sequence A-B-C. The phase sequence should be observed either from the waveforms in the time domain shown in Figure (a) or from the phasor diagrams shown in Figure (b), and not from space or schematic diagrams, such as Figures (a). If the rotation of the generator of Figure is reversed, or if any two of the three leads from the armature (not counting the neutral) to the generator terminals are reversed, the phase sequence becomes A-C-B (or C-B-A or B-A-C), which is known as negative phase sequence.
Only the balanced three-phase sources are considered in this chapter. Selection of one voltage as the reference with a phase angle of zero determines the phase angle of all the other voltages in the system for a given phase sequence. As indicated before, the reference phasor is chosen arbitrarily for convenience. In Figure(b), ¯VBC is the reference phasor, and with the counterclockwise rotation (assumed positive) of all the phasors at the same frequency, the
sequence can be seen to be A-B-C. Unless otherwise mentioned, the positive phase sequence is to be assumed.
how do I find the ic and ve
Q. Two balanced, wye-connected, three-phase loads are in parallel across a balanced, three - phase 60- Hz, 208-Vsupply. The first load takes 12 kWat 0.6 power factor lagging, and t
a. Given a timer with a terminal count and a clock frequency of 10 MHz measure the following: (i) Range & Resolution (ii) Terminal count values needed to measure 3ms interval
what is a mash current theoram
Strategic Perspective of An organization Strategic perspectives cover functions such as revenue, customer satisfaction, people, procedure and technology. Every organization re
Give the properties and uses of silicon iron alloy and nickel iron alloy. Silicon Iron alloy: Pure iron has low resistivity that results in higher eddy current losses. These
short note on armature reaction
State the different stabilization techniques and compensation techniques
Critical Rate of Rise of Current The maximum rate of increase of current during on state which the SCR can tolerate is called the critical rate of rise of current f
This example is concerned with steady-state sinusoidal analysis by using mesh equations and MATLAB. Let us consider the circuit shown in Figure and find the input impedance at the
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd