Single core cable design for 25 kV. The radius of conductor is 0.5 cm. The insulation material consists of two layers. The thickness of each

Q: Service conductors must be sized at no less than ________percent of the continous load, plus 100…

A: Service conductors must be sized at no less than 125  percent of the continous load, plus 100…

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: The avalanche breakdown occurs at a lower voltage compared to zener voltage. True False

A:

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: .Define the return loss, reflection coefficient and if the return loss (R.L) for a load is 12dB.…

A:

Q: The number of disc insulators used in a suspension insulator setup with string efficiency 80 %,…

A: In this question , we will find no of disc insulator used with given data..

Q: The compensating winding carrying the

A: The compensting winding carries the current to reduce stator field distortion.

Q: The number of disc insulators used in a suspension insulator setup with string efficiency 85 %,…

A: In this answer let us find the no.of disc insulators in a suspension type insulators setup as shown…

Q: B: A string of transmission line has 3 insulators, the total voltage distributed on them. Determine…

A: Over head line insulators: Always placed between tower and power conductor. The material should be…

Q: What are the conditions for the parallel operation of 1-phase transformers

A: In this question,  We need to the conditions for the parallel operation of 1-phase transformers?…

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

A:

Q: At relatively light loads, transformer efficiency is low because

A:

Q: Fill in the blank: In non-metalic cable, main glass core is covered cylindrically by another glass…

A: Optical fiber cable is also an non metallic cable made of glass material.  In optical fibre, the…

Q: The number of disc insulators used in a suspension insulator setup with string efficiency 85 %,…

A:

Q: d) Explain the principle of Merz prize system of protectio used for power transformers. What are the…

A: EXPLAIN: the principle of Merz prize system of protection used for power transformers.…

Q: Single core cable design for 25 kV. The radius of conductor is 0.5 cm. The insulation material…

A: The circuit diagram for the question is as follows The electrical gradient in a cable is given by…

Q: Single core cable design for 25 kV. The radius of conductor is 0.5 cm. The insulation material…

A: SINGLE CORE CABLE DESIGN FOR 25KV. THE RADIUS OF CONDUCTOR IS 0.5 Cm . the insulation material…

Q: When conducting no-load test on a given single-phase transformer, the following test data were…

A: As per the guidelines, we supposed to answer first three part of the question at a time so please…

Q: In shall type of transformer windings are wound on two separate limbs of the iron core  True  False

A: We need to tell about the shall type transform winding .

Q: Single core cable design for 25 kV. The radius of conductor is 0.5 cm. The insulation material…

A: we know that electrical gradient in a cable is given by g=Vx ln R2R1

Q: In an outdoor substation the three bus-bar conductors are supported by units of post type…

A:

Q: 10- If power factor is less than unity then it will result in a. Large kVA rating of equipment b.…

A: power factor = RZ

Q: List and describe three (3) losses that occur in power transformers.

A: Losses in power transformers: Iron Losses Copper Loss or Ohmic Loss Stray Loss

Q: Determine the load sharing in MVA for each transformer. Draw the parallel transformer diagram for…

A:

Q: A 35KVA, transformer has 50 Hz frequency input with voltage values given as 300/220V, with primary…

A: It is given that: kVA=35 kVAf=50 HzV1V2=300220N1=550

Q: Q.4. What do you mean by iron space factor with respect to transformer core? he eunnl h

A: Consider the formula for the iron space factor. k=AAc Here, A is the gross area of the core and ACis…

Q: Single core cable design for 25 kV. The radius of conductor is 0.5 cm. The insulation material…

A: electrical gradient in a cable is given by  g=potentail differnecex lnR2R1   = Vx lnR2R1

Q: Compare dielectric properties of oil with solid Insulators and liquid Insulators. Compare…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: What is the influence of transformer in single-phase connections transformers phase operation…

A: Types of primary and secondary coil connections  Star Star  Star delta  Delta delta Delta star…

Q: Seconday winding of transformer is made-up of __________________________ material. insulated copper…

A: Choose the correct option Seconday winding of transformer is made-up of __________________________…

Q: False True the slip-rings replaced by separated segments In order to generate a bidirectional…

A: "The slip rings replaced by seperated segment in order to generate a bidirectional voltage" This…

Q: Explain the difference between transformer equivalent circuit and IM equivalent circuit.

A: Equivalent circuit- An equivalent circuit is a simplified circuit (or model) that is easier to…

Q: EHV lines often have more than one conductor per phase; these conductors are called a Fill in the…

A: in the EHV lines, more than one conductor per phase is used to reduce the losses that occur due to…

Q: As a transformer core, silicon steel has lower hysteresis losses than air. Select one: True False

A: Choose the correct option The given statement As a transformer core, silicon steel has lower…

Q: is connected. Determine Foil current and output of transform

A: Transformer is a static device, which transfers electrical energy from one circuit to other circuit…

Q: At relatively light loads, transformer efficiency is low because:

A: At relative light loads, transformer efficiency is low because there are some losses which are fixed…

Q: In transformer, the hysteresis loss can be minimized by O using thin size copper conductors O using…

A: In this answer let us discuss how is is possible to minimize the hysteresis loss in a transformer as…

Q: voltage side. The voltage regulation of this transformer for the secondary

A:

Q: To interconnect grounding electrodes and form a grounding electrode system, connect the _______ to a…

A: Option A is the correct option

Q: 3. If we use in transformer core (i) solid magnetic material, or (ii) nonmagnetic material, comment…

A: The fallowing are the consequences if we use transformer core with both magnetic and non magnetic…

Q: Calculate the loop inductance per km of a single phase overhead line consisting of two conductors…

A:

Q: A single core lead covered cable is to be designed for 68 kV(peak value) to earth. Its conductor…

A: Given: A single core lead covered cable is to be designed for 68 kV(peak value) to earth. Its…

Q: For direct burial cables, the minimum burial depth is_? A. 6 inches b. 12 inches c. 18 inches d. 24…

A: For the given question we need to select a correct option

Q: I. 1. Please research on the following items: Instrument Transformers A. Current Transformers ➤…

A: Given data, A) Current transformers:- Its operation, its types, and its applications. B) Voltage…

Q: Single core cable design for 25 kV. The radius of conductor is 0.5 cm. The insulation material…

A: According to question : r=0.5 cmr1=2.5 cmR = 4.5 cmV1=20 KVV2=5 KV

Q: 8/ As a transformer core, silicon steel has lower hysteresis losses than air.  Select one: True…

A: The main problem with transformer core is, its hysteresis loss and eddy current loss in transformer.…

Q: The minimum size raceway for the following branch circuit conductors is: One, 10 AWG…

A: Raceway sizing The conduit and tubing size required for an installationdepends on following factors:…

Q: Primary winding of transformer is made-up of __________________________ material. a. insulated…

A: CRGO grade steel predominantly discovers applications as center material for power transformers and…

Q: When one of the system conductors is grounded at the transformer, the other system conductors rise…

A:

Fault Analysis

In an electrical engineering system, a fault is an abnormal electric current flowing through the system, and fault analysis is the study of these faults. For instance, a short-circuit is a fault where the live wire touches the ground or neutral wire. If a circuit is interrupted by a failure of a current-carrying wire then an open circuit fault occurs. The open-circuit faults are also called series faults. One or more phases or ground may be involved in a three-phase fault or may occur only between two phases. Current flows into the earth in case of a ground fault or earth fault. For most situations, the prospective short circuit current of a fault that is predictable can be calculated. To limit the loss of service because of a failure, the protective devices can detect fault conditions and operate circuit breakers and also other devices. All phases equally can be affected in a poly-phase system which is known as symmetric electrical fault. The asymmetric fault becomes more complicated to analyze if only some phases are affected. By using methods such as symmetrical components, the power system analysis of these types of faults is often simplified. The main objective of power system protection is to design, detect, and interrupt power system faults.