Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Chapter 4, Problem 11SQ
To determine
Choose which type of switch (normally open or normally closed) would be installed for float switch in Figure 4-12.
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A generator delivers power through a transmission line to a star-connected load. The system is
balanced. Find the values of the currents involved in per unit, considering: (a) single-phase
bases and (b) three-phase bases.
Datos:
S₁ = 2 MVA
Vg
= 13.2 kV
Generador
++
Linea
Demanda
Pg+jQg
Uga
ZLT a
Zlinea 8.68+j3.162
Zcarga = 70+/10
la
ZDa
ZD b
ZD€
Bases trifásicas:
Ug b
ZLT b
Sb36 = 2 MVA
Vb34 = 13.820° kV
Ugo
ZLTC
control system
control system
Chapter 4 Solutions
Electric Motor Control
Ch. 4 - Identify the following symbols.Ch. 4 - Electrical symbols usually conform to which...Ch. 4 - What do the following abbreviations stand for? a....Ch. 4 - Single-pole and double-pole switch symbols are...Ch. 4 - The symbol shown is a a. polarized capacitor. b....Ch. 4 - The symbol shown is a a. normally closed float...Ch. 4 - The symbol shown is a(n) a. iron core transformer....Ch. 4 - The symbol shown is a a. normally open pressure...Ch. 4 - The symbol shown is a a. double-acting push...Ch. 4 - If you were installing the circuit in Figure 412,...
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