4 Nov Ch 32 (a Vol). 1. TRANSFORMER! ➣➣➣➣➣ Working Principle of Transformer ➣➣➣➣➣ Transformer Construction. 26 Nov Induction Motor (a Vol. – 2). 1. Electrical Technology Induction Motors Three phase and single phase; 2. Induction Motor: General. B.L. Theraja is the author of A Text Book of Electrical Technology ( avg rating , ratings, 89 reviews, published ), Basic Electronics ( a.
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Obviously, point Bl thareja is the point of minimum potential. You already have an account? The addition of the middle wire is made possible by the connection diagram shown in Fig. As seen, the potential difference and current have their maximum values at feeding points Bl thareja 1 and F 2.
The procedure bl thareja finding the point of minimum potential is as follows:. M 1 and M 2 bl thareja two identical shunt machines coupled mechanically with their armatures and shunt field winding joined in series across the outers.
The resistance of a cable is 0.
In fact, let us, for the time being, imagine that it is just not there. In that case, the point of minimum potential is obviously the middle point. Drop due to uniform load can be found by imagining that bl thareja distributor is cut into two at point.
It is given that the resistance of bl thareja distributor is 0. Take the cross-section of the conduc- tors as 0. A 2-wire distributor metres long is fed at P at Lb and loads of 40A, 20A, 60A, 30A are tapped off from points A, B, C and D which are at distances of metres, metres, metres and bl thareja from P respectively. These feeders deliver power at certain points to a distributor which runs along the various streets.
The various loads and their positions are given below: The 2-wire system when used bl thareja transmission purposes, has nl lower efficiency and economy as compared to the 3-wire system as shown later. Calculate the currents in the various sections of the distributor, the minimum voltage and yhareja point at which it occurs. It should be noted that bl thareja of point of minimum potential is not affected by the uniformly- spread load of 0.
A B is thzreja sending end and CD the receiving end.
Electrical book bl thareja – Docsity
Also, determine the current in bl thareja section of the distributor. It follows from this that the total voltage drop is the same as that produced by a single load equal to the sum of the various concentrated loads, acting at the centre thwreja gravity of the load system. Calculate the voltage at the feeding point B, the current supplied by each feeder and the p. A distributor AB is fed from both tharrja. Any convenient unit bl thareja length may be chosen i.
For a distributor fed at both ends with equal bl tharejathis drop equals zero.
If you don’t receive any email, please check your Junk Mail box. Transmission and Distribution Fig. Bl thareja yet, there is no economical method of raising the d.
Calculate the currents in the various. To this add the voltage drop due to uniform loading as calculated from the relation. System—Disadvantages of 25kV A. The thxreja A and B are fed at V. The cable is uniformly loaded at 0. It is proposed to lay out a d.
A good system whether overhead or underground should fulfil the following requirements: In this bl thareja, value of x can be found. bl thareja
Calculate the saving in copper if this voltage bl thareja doubled with power transmitted remaining the same. Electrical Technology ; Utkal Univ.
electrical book bl thareja, Guides for Electronics. Bharath University
Sometimes when there is only one distributor bl thareja a locality, several sub-distributors SD branching off from the distributor are employed and service mains are now connected to them instead bl thareja distributor as shown in the figure. Concentrated loads are shown in Fig.
Line supports consist of i pole structures and ii tower. Then, assuming i to be the input current at A, the different currents in various sections are as bl thareja. Such cases are solved in two stages. Resistance of single wire is 0.
Download B.L. Thareja-Basic electrical Engineering (Vol.1)
A circuit-board as shown above uses DC current Fig. This case can be dealt with bl thareja by taking moments in amp-m about the two ends and then making a guess bl thareja the point of minimum potential or by assuming a current x fed at one end and then finding the actual current distribution.
Since F 2 is at a lower potential, these ampere-metres appear in the coloumn for F 2 as initial drop. I authorize the treatment of my personal bl thareja for promotional and advertising communications and activities realized by Docsity. Let the current distribution be as shown in Fig. All the currents tapped off between points F 1 and A bl thareja be supplied from F 1 while those tapped off between F 2 and A will be supplied from F 2.
Electrical Technology by B.L. Thareja (2nd hand)
Let us find out the point of minimum. The transmission cost should not be unduly excessive.
bl thareja Consider a small section of length dx near point C. Find a the current supplied at A b the current supplied at B c the current in each section d the voltages at C, D and E. Tharfja Solution The alternative method is to take the total current fed at one end, say, Bl thareja 1 as x and then to find the.