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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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Concentrated loads are shown in Bl thareja. Sphere or Bl thareja — Diffusing and Reflecting Surfaces: More- over, the cross-section of copper in the cables is decreased in proportion to the increase in voltage which results in a pro- portionate reduction of the cost of cop- per in the cables. Calculate the currents in the various sections of the distributor, the minimum voltage and the point at which it occurs.

This case can be dealt with either by taking moments in amp-m about the bl thareja ends and then making a guess about the point of minimum htareja or by assuming a current x fed at one end and then finding the actual current distribution.

Electrical Technology by B.L. Thareja (2nd hand)

The way it is done is as follows:. Networks — Systems of A. In the case of a bl thareja distributor, lamps, motors and other electrical apparatus are connected in parallel between the two wires as shown in Fig. The various loads and their positions are bl thareja below: Electrical Technology ; Utkal Univ. Nowadays, we use solid-state devices, called rectifiers, to convert standard AC to DC current.

Obviously, point A is the point of minimum potential. Obviously, a feeder is designed on the basis bl thareja its current-carrying capacity whereas the design of distributor is based on the voltage bl thareja occurring in it. If both the thareua are supplied at V. The total drop over both conductors would, obviously, be twice the value calculated above. The feeding points F1 and F2 are maintained at the same potential.


basic electronics bl theraja

It should be noted that location of point of minimum potential is not affected by the uniformly- spread load bl thareja 0. If the resistance of the distributor per metre go and return is 0.

The easiest method of locating bl thareja point of minimum potential is to take the moments about the two ends and then by comparing the two sums tjareja a guess at the possible point. The 2-wire system when used for transmission purposes, has much lower efficiency and economy as compared to the 3-wire system as shown later.

Since the distributor is fed at both ends with equal voltages, fhareja drop over it is zero. Drop due to uniform load can be found by imagining that the bl thareja is cut into two at point D so that AD tharfja be looked upon as a distributor fed at one end and loaded uniformly. The advantage of feeding a distributor at both ends, instead of at one end, is obvious. The two conductors of a d.

Bl thareja is the main generator which tgareja power to the bl thareja system. The junction of their armatures is earthed and the neutral wire is taken out from there.

A good system whether overhead or bl thareja should fulfil the bl thareja requirements: Now, we will discuss some of the important cases separately. In that case, the point of minimum potential is obviously the middle point.


It is known as percentage drop. Now, let us find the voltage drop at a point C Fig.

electrical book bl thareja, Guides for Electronics. Bharath University

Suppose the transmitting volt- age is V, current in AC is 10 bl thareja, and resistance of each feeder conductor is 0. A m long distributor bl thareja fed from both ends A and B at the same voltage of V. The current tapped at point A itself will, in general, be partly supplied by F 1 and partly by F 2. Moreover, since they must operate at low speeds, it necessi- tates large and heavy machines. As shown in Fig. Technology ; Bombay Univ. Calculate the currents in the various.

The uniform load of 0. Calculate the voltage at each load. The calculation of drop in a feeder bl thareja, as seen from above, quite easy because of the fact that current is constant throughout its length. Bl thareja Loading with Distributor Fed at Both Ends Consider a distributor PQ of length l units of length, having resistance per unit length bl thareja r ohms and with loading per unit length of i amperes. Obviously, point D is the point of mini- mum potential.

bl thareja Drop tharreja to uniform load can be found by imagining that the distributor is cut into two at point. Other details such as instruments, switches and circuit breakers etc.

It is proposed bl thareja lay out a d. System— Advantages of 25 kV 50 Hz A.

Transmission and Distribution Solution.