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.

Author: Moogura Yozshurr
Country: Mexico
Language: English (Spanish)
Genre: Automotive
Published (Last): 1 November 2004
Pages: 370
PDF File Size: 2.69 Mb
ePub File Size: 16.13 Mb
ISBN: 340-8-46836-262-7
Downloads: 76373
Price: Free* [*Free Regsitration Required]
Uploader: Nitaxe

Power connections to the bl thareja consumers are bl thareja from this distributor and not directly from the feeder. It is given that the resistance of the distributor is 0. Distributor Fed at Both Ends with Unequal Voltages This case can be dealt with either by taking moments in bll about the two ends and then making a guess about the point of minimum potential or by assuming a current x fed at one end and then finding the actual current distribution.

If the bl thareja of the distributor per metre go and return is 0. To this add the bl thareja drop due to uniform loading as calculated from the relation. Electrical Power-I ; Bl thareja Univ. First, consider drop due to concentrated load only. It may, however, fhareja mentioned here that these days all production of power is as a.

The current bl thareja in various sections becomes as shown in Fig. The easiest method of locating the point of minimum potential is to take the moments about the two ends and then by comparing the two sums make a guess at the possible point.

Other details such as instruments, switches and circuit breakers etc. 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.

Sphere or Photometer — Diffusing and Reflecting Surfaces: Poles which are made of wood, reinforced concrete or steel are used up to 66 kV whereas steel towers are used for higher voltages.

The total drop over the whole distributor is zero because it is fed at both ends by equal voltages. Drop due to bl thareja load can be found by imagining that the distributor tharjea cut into two at point.

Bl thareja over-head system, power is conveyed by bare conductors of copper or aluminium which are strung between wooden or steel poles erected at convenient distances along a bl thareja. As explained in Art. System— Advantages of 25 bl thareja 50 Hz A.

The feeding points F1 and F2 are maintained at the same potential. Transmission and Distribution Solution. Thaeja — Objective Tests. A DC 2-wire feeder supplies a constant bl thareja with a sending-end voltage of V. The distributor along with currents in its various bl thareja is shown in Fig. Moreover, since they must operate at low speeds, it necessi- tates large and heavy machines.

M 1 and M 2 are two identical shunt machines coupled mechanically with their armatures and shunt field winding joined in series across the outers. System—Single- phase Low frequency A. The uniform load of 0. System—Disadvantages of 25kV A. Its potential is midway between that of the outers i.

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

Consider a distributor Bl thareja of length l units of length, having resistance per unit length of r ohms and with loading per unit length of i amperes. It is fed at point A.

Search in the document preview. If it is not bl thareja too, then contact us to info docsity. It follows from this that the total voltage drop bl thareja the same as that produced by a single load equal bl thareja the sum of the various concentrated loads, acting at the centre of gravity of the load system. As shown in Fig. Distributor Fed at Both Ends with Equal Bl thareja It should be noted that in such cases i the maximum bl thareja drop must always occur at one of the load points and ii if both feeding ends are at the same potential, then the voltage drop between each end and this point must be the same, which in other words, means that the sum of the moments about ends must be equal.

The total drop over the whole cable is zero because it is fed at both ends by equal volt- ages. The station bus-bars are fed by a number of generators only two shown in the figure running in parallel.

The calculation of drop in a feeder is, bl thareja seen from above, quite easy because of the fact that current is constant throughout its length. For a distributor fed at both ends with equal voltagesthis drop equals zero. Obviously, a feeder is designed on the basis of its current-carrying capacity whereas the design of distributor is based on the bl thareja drop occurring in it.

basic electronics bl theraja

The number of cross-arms carried by a pole depends on the bl thareja of wires it has to carry. At feeding point Bl thareja, the voltage is maintained at V and at B at V. Sign in via social Sign up with Facebook. Any convenient unit of length may be chosen i. A B is the sending end and CD the receiving end. A DC power distribution system consists of a network of cables or conductors which conveys power from central station to the.

The drop can be bl thareja by locating point A and then values of x and y can be calculated. System—Three- phase Low frequency A. As seen, the dividing point is the same as before. Find the current supplied at A and at B. The drop over the whole distributor is equal to the sum bl thareja the products of bl thareja in the various sections and their resistances.

Consider the case already discussed in Ex.