The ohmic value of impedance to be connected in the neutral to ground circuit of a 2000 kVA transformer with Earth fault relay set to 40%, with respect to 400 V side calculate ohmic value of impedance?

Q: A current transformer has 15 turn on the primary and 75 turn on the secondary. The relay burden is…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

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: Find the current through the resistor at t=0+, and at t=1.25s. The switch is closed at t=0 50V 2092…

A: The general expression of current in RL circuit is given as i(t)=VsR(1-e-t(L/R))vS=supply voltage

Q: A 33 KV substation is to be connected to a 11 KV stepdown substation which is at a distance of 1.5…

A: We have Transmission line which connects 33 KV Sub-Station to 11 KV Substation. This line is 1.5 KM…

Q: How do the auto-transformer on no-load and the unioaded voltage divider behave in relationship to…

A: It is asked how an auto-transformer on no-load and an unloaded voltage divider behave in…

Q: Q3/A/ Fill in the blanks: 1. The most common type of 3-phase unsymmetrical fault is 2. In a balanced…

A: The solution is given below

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: How many types of winding in distribution transformers? What is the impact of each type on…

A: There are three types of windings: Single Helical Winding. Double Helical Winding. Disc-Helical…

Q: - Transformers and Special Locations 7.a. Dry-type transformers are available in what…

A: Transformer:- It is an electrical static device that is used to transfer energy from one circuit to…

Q: A10 The transformer rating is usually expressed in terms of kVA. (TRUE/FALSE)

A: The above statement is TRUE. The transformer rating is expressed in terms of KVA.

Q: Q5: A SL-G fault occurs on the low voltage side of a transformer that connects a motor to a…

A: Given data for generator, Given data for motor,

Q: 7.A three-phase transformer bank has the primary and secondary windings connected in a wye…

A: Note: As per our policy we can solve single question, please re-upload the remaining question as a…

Q: the fault current for a

A: Types of open circuit fault- 1) Symmetrical fault- Three phase line to ground fault  Three phase…

Q: A I0 kVA, single-phase transformer has a turns ratio of 12:1 and is supplied from a 24 kV supply.…

A:

Q: 1- 3-phase 25-kVA 34,5/0,48-kVu distribution transformers are connected in A-Y. Open-circuit test…

A:

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: True or False    3 - Single Phase Transformers cannot be used to replace a 3-Phase transformer.

A:

Q: What's the maximum primary overcurrent device rating for a 0.50 kVA, single-phase, 240V transformer?

A: Transformer is a static device which transfers power from one circuit to another circuit without…

Q: ignore X and Y values

A: Step 1:Step 2:Step 3:

Q: Given that a 400-kVA, 3-phase transformer has a 480-V primary and a 208/120-V secondary. a)…

A: Transformers are key in electrical systems, adjusting voltage levels through electromagnetic…

Q: 3) Draw the schematics of a HVDC and of a HVDC light, compare the systems evidencing advantages and…

A: HVDC means high voltage direct current is a method of electrical power transmission which uses…

Q: transformers: 1. How are the terminals marked? 2. What do the numbers on a clock face represent? 3.…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

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: Calculate the turns ratio from the transformer primary/secondary voltage ratings Using the…

A: Given Data at secondary side   Voltage Current Power Open circuit 120 V 0.290 A 8.778 W Short…

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

A:

Q: In No-Load test circuit of single-phase transformer input power is equal to? In short circuit test…

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A: Given To determine CT connection configuration for differential scheme, if transformer is connected…

Q: 1) Prepare data for fault analysis of the system (see figure below). Recommended base MVA is 10 MVA

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: With the basic circuit diagram, explain the restricted earth fault relay for a transformer.

A:

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: Short circuit test on a single phase transformer is performed to determine_____________ a.…

A: Need to Find the correct option

Q: A LLL fault occurs at terminals of a 33 kV, 3 phase 50 Hz circuit breaker. The maximum value of…

A: Given- A LLL fault- 33 kV, 3 phase-50 Hz circuit breaker, To Find- The maximum value of the…

Q: 1. Find the fault current (in amps) for a three phase, B-C Phase, and A phase to ground bolted fault…

A: In this question we need to find the thee phase fault occurs at middle of transmission line as shown…

Q: 1. The subscript d in the generator subtransient reactance refers to: 1. Generator 2. Generator 3.…

A: Subtransient:  It occurs extremely fast- faster than even transient. The subtransient time period…

Q: A 3-phase three stepped core transformer having a leakage impedance of 0.15 p.u. The positive…

A: The 3-phase transformer has equal positive, negative and zero sequence reactance. Z1=Z2=Z0

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A: The figure shows an NPN BJT amplifier under common collector configuration. We have been asked to…

Compensation Techniques

The compensation techniques are the methods that are employed in the electrical control systems to enhance the performance of the system. The performance are generally affected by the factors like lag in the compensating devices, slow response of the system of the components like sensors used in the control system. The basic compensation technique involves lag compensation, lead compensation or the combination of the both.