{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

IRWIN 9e 11_74 - Irwin Basic Engineering Circuit Analysis...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Irwin, Basic Engineering Circuit Analysis, 9/E 1 11.74 A standard practice for utilit},r companies is to divide its customers into single-phase users and three-phase users. The utility must provide three—phase users, typically industries, with all tluee phases. However, single—phase users, residential and light commercial, are connected to only one phase. To reduce cable costs, all single—phase users in a neighborhood are connected together. This means that even if the threephase users present perfectlyr balanced loads to the power grid, the single—phase loads will never be in balance, resulting in current flov.r in the neutral connection. Consider the 60H; air—sequence network in Fig. P1134. With a line voltage of 4lfif3lJ° V rms, phase a supplies the single—phase users on A Street, phase 11 supplies B Street, and phase r: supplies C 5H Furthermore, the three—phase industrial load, which is connected in delta, is balanced. Find the neutral current. Figure P1134 SOLUTION: IAN ‘ WWW—0° 96: 40010. A/mnc Q40Lo° ? 30ki°° * IZEZ‘ ".45 _ = ~u~ = —420 we ’3“ a q 0 but)“ 0 t) éok Lo *3 0350020 74 MM 44'!) [120° “ 33,95: 36kN (H Z H %—¢ ,, Bék . iszA pp 015’ 334, a 72k Low” (0.5): '72. [600 KVA in WA FWWmea—fiSwM 55—w)= Chapter 11: Polyphase Circuits Problem 11.74 2 Irwin. Basic Engineering Circuit Analysis, 91E .- 0 7% u IA 3 V2“ k 439%.“) = 5100 ("60 A mm: 3 (2900)”) I,5= loot—1&0 Pr arms 12: loog‘goU A «firm ,— Iam ; IA ’r—IAN ;’00 1'60 +1004!) lip, ’“MLW 53 (7 l9://9 A 75m; ’ P 156 3 1151’ 1m =- ’00 5:30 +115” [—22.0 153 3' /95'v26 Ari/903236 A Ymfi ’- n "" 0 Ice ‘5 Ic,"' 1m “MOO 1600* 25-0 [19-0 fee: 321.25 005.?” A xmg .— 1"“ lnN 3' ”‘ am ”Ibis” Inc ‘7: ,: ,(g49.§8L’l‘?»1/9)’(/7§v2é[:/96:33) ——@i2.2-5‘/_/03"79 1’th l08~ 763’ 1+ 83. 42°A Problem 1174 Chapter 11: Polyphase Circuits ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern