Loads, Service, and Overcurrent Protection 12.a. A one-family dwelling has one dryer with a nameplate rating of 5,500 VA. What's the demand load on the line and the neutral? A. 5,500 VA line, 3,850 VA neutral B. 5,500 VA line, 5,500 VA neutral C. 3,850 VA line, 5,500 VA neutral D. 3,850 VA line, 3,850 VA neutral 12.b. Calculate the general lighting load for a one-family dwelling with a total living area measuring 25′ × 70′. A. 583 VA B. 5,250 VA C. 5,400 VA D. 3,500 VA

Loads, Service, and Overcurrent Protection 12.a. A one-family dwelling has one dryer with a nameplate rating of 5,500 VA. What's the demand load on the line and the neutral? A. 5,500 VA line, 3,850 VA neutral B. 5,500 VA line, 5,500 VA neutral C. 3,850 VA line, 5,500 VA neutral D. 3,850 VA line, 3,850 VA neutral 12.b. Calculate the general lighting load for a one-family dwelling with a total living area measuring 25′ × 70′. A. 583 VA B. 5,250 VA C. 5,400 VA D. 3,500 VA

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.49P: Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings...

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Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings given: Generator G1: 50MVA,13.2kV,x=0.15p.u. Generator G2: 20MVA,13.8kV,x=0.15p.u. Three-phase -Y transformer T1: 80MVA,13.2/165YkV,X=0.1p.u. Three-phase Y- transformer T2: 40MVA,165Y/13.8kV,X=0.1p.u. Load: 40MVA,0.8PFlagging,operatingat150kV Choose a base of 100 MVA for the system and 132-kV base in the transmission-line circuit. Let the load be modeled as a parallel combination of resistance and inductance. Neglect transformer phase shifts. Draw a per-phase equivalent circuit of the system showing all impedances in per unit.
1- The recommended limit of voltage drop on a lighting circuit for a single-phase supply as per IEE Wiring regulations is equal to 6.3 volt. Then the value of supply voltage is a. 290V b. 250V c. 210V d. 230V 2- Which of the following statement is TRUE ? a. Resistance is not proportional to length of the material and Resistance is proportional to area b. Resistance is proportional to length of the material and Resistance is proportional to area c. Resistance is not proportional to length of the material and Resistance is inversly proportional to area d. Resistance is proportional to length of the material and Resistance is inversly proportional to area
Please
A network that is consuming negative reactive power means that it is _____ A. Capacitive B. Inductive C. Resistive
Compared to the original circuit that it replaces, an equivalent circuit will always have:a. the same power dissipation.b. the same number of componentsc. the same voltage and current for a specific loadd. all of the above
Figure 3.39 shows a oneline diagram of a system in which the three-phase generator is rated 300 MVA, 20 kV with a subtransient reactance of 0.2 per unit and with its neutral grounded through a 0.4- reactor. The transmission line is 64km long with a cries reactance of 0.5-/km. The three-phase transformer T1 is rated 350MVA.230/20kV with a leakage reactance of 0.1 per unit. Transformer T2 is composed of three single-phase transformers, each rated 100 MVA, 127/13.2kV with a leakage reactance of 0.1 per unit. Two 13.2kV motors M1 and M2 with a subtransient reactance of 0.2 per unit for each motor represent the load. M1 has a rated input of 200 MVA with its neutral grounded through a 0.4- current-limiting reactor, M2 has a rated input of 100 MVA with its neutral not connected to ground. Neglect phase shifts associated with the transformers. Choose the generator rating as base in the generator circuit and draw the positive-sequence reactance diagram showing all reactances in per unit.
A 3-D power system experienced an unbalanced fault type had the following sequence voltages at the fault point: (a) (b) Vo = 0.1872180° p.u. V₁ = 0.50720⁰ p.u. V₂ = 0.32021800 p.u. Calculate the related phase components, Vabe at the fault point. Hence, by inspecting your results in (a), identify the type of fault.
Substations have the functions of: Transmission Elevator, Subtransmission Lower and Distribution, according to their purpose. The common characteristic of the types presented is their objective, which is to modify the characteristics of electrical energy. Substations have sets of conductors, equipment and devices, and with these sets they work to ensure performance and safety in the electrical distribution system. Substations are also responsible for switching, protection, voltage and current transformation, reactive compensation to direct the power flow and enable its diversification through alternative routes, or a combination of these in the Electric Power System (SEP) . Describe the role of substations in the distribution of electricity, and what is their relationship with the primary and secondary distribution, describing the consumers of these demanded loads. PLEASE TYPEABLE BECAUSE THE LETTERS GET IN THE UNDERSTANDING.
The recommended limit of voltage drop on a power circuit for a single-phase supply as per IEE Wiring regulations is equal to 12 V. Then the value of supply voltage is a. 200 V b. 400 V c. 240 V d. 230 V
c.1. Which of the following is one of the three essential functions of an equipment grounding conductor?A. Provide an arc-fault current pathB. Establish groundingC. Establish bondingD. Ensure the system is groundedc.2. What's another name for the three-point method of Earth resistance testing?A. Fall-of-potentialB. Line surgeC. Spatial shieldingD. Leakage current c.3. If the National Electrical Code provides a requirement to ground equipment, it generally implies thatthere will be a direct connection to the Earth of a connection through a/anA. grounding electrode conductor.B. equipment grounding conductor.C. equipotential bonding conductor.D. bonding conductor.
A power generation plant connected to bulk load of high voltage industries shown in Figure Q3 has specifications given in Table Q3. Each equipment reactance is expressed in per unit on a common base of 100 MVA. a) Find the fault level for each bus bar in the generation plant. GI G2 TI Figure Q3: Single line diagram of a power generation plant Table Q3: Specifications of power system components Power System Component Voltage Rating X MVA Rating (kV) (pu) GI 50 33 0.2 G2 40 33 0.18 50 33/11 0.1 T2 40 33/11 0.1
1. Draw a schematic diagram for electrical networks from generators to the consumers with their connections and Show transmission, sub transmission and distribution sections in this figure. Show each sections voltage level. Show transformers voltage level. Show the number of wires in each section. Also shows the final single phase/three phase consumers connection to the low voltage systems.