LOCO SHED GOMOH

-
ACKNOWLEDGEMENT I would like to express my sincere grateful and profound gratitude to LOCO SHED ,GOMOH for providing an opportunity to undergo Vocational Training of 04 weeks in “ELECTRIC LOCO SHED, Gomoh, Jharkhand’’. I bear immense pleasure in expressing my gratitude and thanks to all the Employees of respective shops for their honest teaching, practical demonstration, guidance and suggestion in respective sections. Furthermore, I would like to acknowledge with much appreciation the crucial role of staffs, who gave us the permission to use all required equipment and the necessary materials during our training period. CONTENTS 1. Introduction 2. Locomotives 3. Syntaxs used in Loco 4. Components of Loco 5. Different Sections of Loco 6. Brake Rigging 7. Pantograph 8. Traction Converter 9. Working of Loco 10. Conclusion INTRODUCTION  The ISO-9001-2008 certified Electric Loco Shed, East Central Railway, Gomoh situated in Gomoh. ELECT...
Post a Comment

D.c network and theorems

-
             D.c NETWORKS AND THEOREMS   
____________________________________________INTRODUCTION_ 
   °in the study of electrical engineering which involves the study of the behaviour of electrical systems and devices the knowledge of electric circuit theory is very essential. We are there for beginning  our study of electrical circuit theory with the study of various  methods off the network analysis and principle theorems which have been developed for solving problems and complex electrical networks
°even through the discussion in the chapter is restricted to D.C circuit only, it is equally applicable to A.C network in the case of A.C networks, the only difference is that the impedance's are used instead of just ohmic resistance's. Since the impedance as well as as currents and voltages in such(ऐसा) circuits are expressed (व्यक्त करना) by complex numbers the algebraic manipulation are more extensive(बहुत बड़ा). ------------------------------------------------------
°CONCEPT OF OPEN AND SHORT CIRCUIT'S 
____________________________________________ °The conceptual  understanding of open circuits and short circuits is very important in the analysis of electrical network. otherwise, they can cause a lot of confusion while applying some of the methods of theorems for the solution of electrical networks.
        Open circuit: An open circuit exist between two isolated terminals of a network which are not connected by an element of any.
 °under these condition the terminals can have a potential difference across them but the current flowing through them is always zero amperes.
°for example, consider the batteries of EMF E volts and internal resistance of r ohms shown in fig. 2.1.
°and open circuit exist between the terminals a and b there is a voltage of V(=E) volts between these two terminals, but the current flowing between them is zero to the absence of a closed path for it's flow.                          
           Short circuit: A connection of zero resistance across and element or combination of elements is called a short circuit.      
°a short circuit can carry a current of high level but the potential difference across its terminals is always off zero voltas.
 ° in the circuit of this figure:-(a), it is obvious that the circuit current I=E/r+R amperes.
°Now, if is short circuit established across the resistor of R ohms as figure:-(b) then under this condition, 
                          Total resistance of the circuit Rt= r+  R×0/R+0= r ohms
                      So,    Circuit current I=E/Rt=E/r amperes 
    If the internal (b)resistance (r) of the battery is vary small, then this circuit will be very high.
° Futher ,since the current always prefers the path of least resistance, all this current will flow the short circuit path and number current will flow through the resistor R*{IR= 0/(0+R)×I= 0}. Also the resistance of a short circuit being zero ohms,  the potential difference across its terminals is always zero volt (Since, in accordance with Ohms law V=l×0=volts).                          .
 Thank you.                                                Written by. Abhishek Singh (E.E)

Comments

Post a Comment

Popular posts from this blog

Nodal analysis problem

-
Image
* Using nodal method, determine the current in the individual of the circuit.   Solution:- Apply KCL in   node 1 :  =  (100-V1/20) -  (V1- V2/15) -  (V1 - V 0/10)=0  = -13 V1 + 4V2= -300  = 13V1-4V2= 300 Apply KCL in   node 2 : = (V1 - V2/15) - (V2 - 0/10)+( 80-V2/10)=0 = 2V1- 8V2 =- 240   From equation (1)   (2), we have,          ∆= | 13           -4   |                                  | 2            -8    |= -104 + 8= -96          D1= | 300       -4   |         | -240      -8   | = -2400-960= -3360 D2= | 13            300   |         |  2      ...
Read more

SURVEYING AND LABELLING

-
Image
              SURVEYING AND LABELLING 1.0  SURVEYING:- Surveying is a branch of civil engineering. Surveying is used to represent the general features of land in their proper relative positions. rom the measurements obtained by surveying, drawings are prepared, which may be in the form of a plan or a map. Surveying is defined as, "the process of toking measurements on the earth surface to determine the relative positions of different points upon it so that, the points may be represented on a plan or a mop Surveying deals with the measurements in horizontal plane 1.1 Purpose of surveying:- 1 To determine the relative positions of existing features of the ground. 2. To layout out mark position or proposed structure on ground. 3. To determine areas, volumes and other related quantities. 4. To prepare map of country and detailed locations of cities, towns, villages and major roads. 5. To prepare engineering plan in detail and section of va...
Read more