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. A shunt generator gives full load output of 30 kW at a terminal voltage of 200V. The armature and field resistance are 0.05? and 50? resp.. The iron and friction losses are 1000 W. Calculate
(1) generated emf (2) copper losses (3) efficiency
Ans.
Given
V = 200 V, P = 30 × 103 W,Ra = 0.05 W, Rsh = 50 W
Pi+f = 1000 W
I = P/V = 30 × 103/200 = 150 Amp
Ish = V/Rsh = 200/50 = 4A
Ia = I +Ish = 150 + 4 = 154 Amp
(a) E = V + Ia Ra = 200 + 154 × 0.05 = 207.7 volt
(b) Copper losses = Ia2 Ra + Iash Rsh
= (154)2 × 0.05 + (4)2 × 50 = 1985.8w
(c) Efficiency ? = Output/ Output + Copper losses + iron losses + friction loss
= 30 × 103/30 × 103 + 1985.8 + 1000 = 90.95%
Q. Introduction to power systems? Thomas A. Edison's work in 1878 on the electric light led to the concept of a centrally located power station with distributed electric power
A rocket on a test stand is modeled as a column clamped at x = 0 and free at x = L, and subjected to compressive force P applied at the free end. The direction of load P remains
different types of sensors and actuators
Illustrate how to replace the HT Fuse on a 6-pole and 4-pole structure? Ans: a) Open switch on 6-pole or 4-pole. b) Connect the discharge rod between earth and conduc
Q. What is the basic principle of oscillation in an RC phase shift oscillator. With a neat sketch explain its working? For producing oscillations there must have positive feedb
what is fuck
Q. Explain about Hybrid network? Hybrid network (sometimes known as a hybrid coilor duplex coil) in a telephone set is a special balanced transformer used to convert a two-wire
The manufacturer of a 6V dry-cell flashlight battery says that the battery will deliver 15 mA for 60 continuous hours. During that time the voltage will drop from 6V to 4V. Assume
Design a mod-15 counter. Explain the various steps in designing the counter
The Input Output System The input output system provides the physical connection between the equipment and the PLC there are many different kinds of I/O cards which ser
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd