From figure below, if 3 phase bolted fault occurs. Using Zbus method to choose a suitable rating of C.B’s. Data are as follows: GI: 100 MVA, 22 Kv,Xgı" = 0.2 pu G2: 100 MVA, 22 KV, X2¯=0.15 pu TRI: 100 MVA, 22/220 KV, XTR1 =0.1 pu TR2: 100 MVA, 22/220 KV, XTR2 =0.1 pu CB TR1 2 ZTL-J50 ohm TR2 св св 3 Zload =(0.2 + j0.1) pu CB

Q: The faults which give rise to unsymmetrical currents (unequal line currents with unequal…

A: Faults may occur in the power system due to Number of reasons. Faults that occurs in transmission…

Q: 5.26 An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z, =…

A: Given, An unloaded generator with pre-fault voltage, E = 1 pu Zero sequence impedance, Zo=j0.15 pu…

Q: Two alternators rated 15 MVA and 20 MVA have per unit  reactance of 0.20 and 0.60 respectively are…

A: In this question,  Two alternators rated 15 MVA and 20 MVA have per unit reactance of 0.20 and 0.60…

Q: The zero sequence current of a generator for line to ground faults is į 3.0 p.u. Then the current…

A: Given, For the line to ground fault, the zero-sequence current, I0=j3.0 pu

Q: Which among the following faults does mostly happen in 3-phase power systems? Single line to ground…

A: As 3 phase fault in power system are, 1. Single Line to Ground fault 2. Three phase short circuit 3.…

Q: For the following single line diagram of a three-phase system, a three-phase fault occurs at point P…

A: Given data : G1 = 20mvA     = 6.9kv which  is taken as base value Xg1 = 0.15  pXg2 at new Base =…

Q: The negative sequence current of a solidly grounded generator for single line to ground fault is j…

A: Given that  negative sequence current of SLG fault is  Ia2 =j2.5 pu. Although for single line to…

Q: protective relay. o uonRJado pn unM DAIRUIDJO0O SI b) A fault occurs at bus 3 of the network shown…

A:

Q: A fault occurs at bus 4 of the network shown in Figure Q3. Pre-fault nodal voltages throughout the…

A: x=1y=7Note: reactance of element right to bus 4 is not given. Hence we will not consider that in…

Q: Zero sequence currents can flow from a line into to a transformer bank if the windings are delta /…

A: Zero sequence current will flow into a star winding only when it's natural is grounded.  Zero…

Q: The busbars of a gonerating station are divided into two soctions A and B by a busbar reactor rated…

A: Two bus bars A and B,connected through  8000KVA with 9% reactance.Two buses are connected to A and B…

Q: For the circuit shown, the normal operating values shown are known. If a symmetrical three-phase…

A: We can redraw the per-phase equivalent circuit as

Q: A 15 MVA, 6.9 KV generator has ( X1=X2= 0.25p.u., Xo= 0.07p.u., and Xn= 0.06p.u.).

A: Given: X0 = 0.07 p.u Xn = 0.06 pu  X1 = X2 = 0.25 pu  15 MVA 6.9 KV  Formula used: If = 3EX1+X2

Q: 11 A 25 MVA, 11 kV, 3-phase alternator has x d = 0.25 pu, Z₂ = 0.3 pu and Zo = 0.2 pu. It's neutral…

A:

Q: write an objects for three-phase system with load on transformer (open and short circuit )

A:

Q: A 25 MVA, II kV generator has X"d=0.2 p.u. X2 = 0.3p.u. and X0=0.1 p.u. Tht neutral of generator is…

A:

Q: In a power system the fault is occurred in all the lines and to the ground without fault impedance…

A: all the line and to the ground fault is symmetrical fault.

Q: Let the system of Figure 1 operating with mechanical input Pm at a steady angle ĉo. A three phase…

A: If a fault occurs in the system, δ begins to increase under the influence of positive accelerating…

Q: b) A fault occurs at bus 2 of the network shown in Figure Q3. Pre-fault nodal voltages throughout…

A:

Q: The faults which give rise to unsymmetrical currents (unequal line currents with unequal…

A: The above statement is incorrect or false.

Q: Q₂Draw Sechematic diagram For A Y/1 three Phase Power transformer subjected to wothrough Fault. L-L…

A:

Q: The sequence components of the fault Izero = -j1pu. The type of fault in the system is current are…

A: The sequence components of the fault current are, Ia1=j2 puIa2=-j0.5 puIa0=-j1.5 pu

Q: // State true or false 1. The line currents drawn by a A connected load has no zero sequence…

A: We are authorized to answer only 3 sub parts at a time so i am answering only 3 subparts please…

Q: A phase to phase fault (betvieen phases b and ) has occurred at the Y side of 100 MVA 132/33 kV AY1-…

A: We can redraw the circuit as

Q: ence components of the fault current are as Ipositive 12 p.u., Inegative and Izero The type of fault…

A: SOLVE ABOVE QUES

Q: A line to ground fault occurs on the terminals of an alternator, sequence voltages and sequence…

A: The given data is shown below:

Q: :A three phase alternator 100 MVA, 13.5 KV, exposure to types of faults are fallowing: Balanced…

A:

Q: FROM THE DIAGRAM ATTACHED SOLVE FOR  i) An equation for the fault current when a…

A:

Q: From figure below, , if 3 phase bolted fault occurs at point 2. Calculate i) Rating of CB's ii) Volt…

A:

Q: The plant capacity of a three phase generating station consists of two 15,000 kVA generators of…

A:

Q: The sequence components of the fault current are as follows: Ipositive = j 2 p.u., Inegative = -j0.5…

A: Given, The sequence components of the fault current are, Ia1=j2 puIa2=-j0.5 puIa0=-j1.5 pu

Q: Q.3 When a line-to-ground fault occurs, the current in faulted phase 'a' is 100A. The zero-sequence…

A:

Q: System Model and Per Unit T1 Line T2 BE ji0/km BE 31.25miles 3C Impedance Load R1.jXi.-0.1+j0.5 p.u.…

A: The single line diagram is shown below: (a) The value of the base MVA and Base KV will be 30 and 13…

Q: A 50 MVA, 11 KV three-phase alternator was subjected to a different types of faults. The fault…

A:

Q: 13. _______ current attempts to return to the source over any available conductive path. A. Direct…

A: The power system has to transmit power from the generation side to the load side. For this purpose,…

Q: A 3-phase system has a phase to phase fault (i.e. phase B is short circuit to phase C while phase A…

A: In this question we will find per unit positive sequence current of line to line fault......

Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.