NEC 110.9 states that equipment intended to interrupt current at_levels should have an interrupting rating surfficient for the nominal circuit voltage and the current that is available at the line terminals of the equipment. A. fault b. maximum c. minimum d. average

Q: The repeated tripping caused by the tendency of GFCIs and AFCIs to trip frequently due to its…

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Q: Function of circuit breaker!

A: A mechanical device called a circuit breaker is made to shut or open contact members, which closes…

Q: 3.On a double line-to-ground faultImmersive reader A) The short-circuit currents in the faulted…

A: In this question , we will write about double line to ground fault....

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: B-For the radial shown in the figure below, calculate: 1- the fault currents for the faults.: FA and…

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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: Write the definitions of subtransient fault current, momentary current and rated symmetrical short…

A: Sub-transient fault current - The sub-transient current is the AC current flowing in the generator…

Q: Write in detail about cable fault location using Varley loop test.With appropiate diagram.

A: Write in detail about cable fault location using Varly loop test. With appropriate diagram.…

Q: 5) Simultaneous opening of local as well as remote breakers are achieved with distance protection…

A: Choose the correct option Simultaneous opening of local as well as remote breakers are achieved with…

Q: In a short-circuit test on a 3-pole, 220 kV circuit breaker. Power factor of the fault = 0.8…

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Q: In its simplest form, ____ completes a path through which fault current can flow. Select one: A.…

A: Reason - Because this path has the least resistance. The earth is a good conductor due to its…

Q: A transformer, circuit breaker is equipped with 500/5 A CTS connected to a induction type over…

A: Given- A transformer, circuit breaker is equipped with 500/5 A CTs connected to a induction type…

Q: 15KV 100 MVA S Z₁ =j15% Z₂=112% Z₁ -17% At + AR Zunes = Zune2=1382 38 ZLineo=1532 138/15KV 15/138 KV…

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Q: 7. What is the object of equipment grounding? Briefl y describe the functions of substation…

A: The object of equipment grounding: To reduce as much as possible the emergence of any voltages in…

Q: What is the approximate line-to- grounded arcing fault value on a 480 / 277-volt system where the…

A: The given system is a 480 / 277-volt system.  The line-line-to-ground-fault current is 30,000…

Q: An industrial installation has a mains cable wired using a 70 mm2 V75 insulated three core copper…

A: In an industrial installation, The main cable is wired using 70 mm2 V75 insulated three core copper…

Q: component of current equal to zero. The nature of fault is a.Three phase fault b.Double line to…

A:

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

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Q: I. Draw the reactance diagram for the following power system in per unit using base power = 50 MVA…

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Q: Q1a Voltage control – fault level A load bus (bus-L) is suppling from two different buses A & B via…

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Q: 7.In a line-to-ground fault we can expect that A) There are no currents to ground. B) The…

A: Single line to ground fault is asymetrical fault that makes the system unbalance. Sequence networks…

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) For the two types of faults that are common in power systems, discuss their causes and the…

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Q: Problem 1(B)- If the fault in Problem 1(A) was a Line-Line fault between phases B and C through a…

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Q: Keeping the opposition to current as low as possible in electrical bonding systems is necessary so…

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Q: Three fourth of the faults that take place in a transmission system is a. Zero sequence fault b.…

A: Different types of faults taking place on transmission line.

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

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Q: Define protective zone and write down its significance. Why is zone overlapping ssary? Explain…

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

Q: Equal area criterion is used for ______________ analysis of power system. a. Transient stability…

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Q: Q1. Given Z, = 0.3L60º, Z¡ = 0.17L80° and, Z2 = 0.45L120°. Compute the fault current and voltages…

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Q: Compute using 4 decimal places and use scientific notation when necessary Box all final answers.…

A: Source:Ean=120∠0° v;Ebn=120∠-120° v;Ecn=120∠120° vZan=Zbn=Zcn=0.1+j1.5 ΩLine Impedance:Zline a=Zline…

Q: Calculate the fault AC and DC components current in 2.5sec instant

A: Given- Sub transient reactance =0.15 pu Transient reactance =0.25 pu Synchronous reactance = 1.5 pu…

Q: What is subtransient and transient fault current? How do they occur in a system?

A: In a system before the fault occurs voltage and current both are symmetrical AC but when a 3 phase…

Q: The system values are given below. The bus 1 voltage after fault =6.18 p.u. The bus 2 voltage after…

A: Following Data is given in the question V1 = 6.18 p.u. V2 = 2.54 p.u. Y12 =3.25 p.u. Fault Current…

Q: V, =1.025Z0°pu P=300MW j0.05 Bus 1 Bus 3 V = 1.03 Slack j0.025 j0.025 Bus 2 400MW 200MVAR

A: The given power system can be redrawn as shown below:

Q: Q1a Voltage control – fault level • A load bus (bus-L) is suppling from two different buses A & B…

A:

Q: A transformer circuit breaker is equipped with 500/5 A C.T.s connected to a induction type over…

A: Given- 500/5A C.T.s transformer circuit breaker- 125% plug setting and 0.4 time setting, 3-ϕ fault…

Q: Figure 1 shows a three-bus power system network of an electric utility company with each generator…

A: The one-line diagram of a three-bus power system network is given. The parameters (reactances) are…

Q: d) Discuss the procedure for computation of fault current in power system when a double line to…

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Q: The system values are given below. The bus 1 voltage after fault =3.35 p.u. The bus 2 voltage after…

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Q: Due to the fault in all the phases at bus -5 the positive sequence fault current of -j1.125 flows to…

A: In this question , we will find post fault voltage..

Q: a. Three phase (3ph), phase to phase, and single line to ground (SLG) at 138kV bus. b. 3ph, and SLG…

A: Solution ::   step: 1 Calculating fault current magnitudes for a Radial distribution system requires…

Q: The speed of circuit breaker is defined as the time between the occurrences of the fault to the…

A: Given  The speed of circuit breaker is defined as the time between the occurrences of the fault to…

Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.