Login Registrieren

Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Power System Analysis and Design

Mulukutla S Sarma, J D Glover, Thomas Overbye

Computer Science

6th Edition · 925 pages

ISBN: 9781305632134

Chapter 13: Q3CSQ (page 857)

How does one select a surge arrestor to protect the specific equipment?

Short Answer

Expert verified

The surge arrestor must be selected depending on the insulation coordination of the equipment.

Step by step solution

01

Define surge arrestor

The surge arrestor are the voltage surge absorbing devices that are used to ground the high voltage surge of the lightning so that there is no power system failure due to high voltage.

02

Determine the description for the answer.

The surge arrestor have the insulation resistance that must be less than that of the equipment that is under protection. The surge arrestor must have capacity to discharge the overvoltage without affecting the insulation. In short the insulation coordination must be insured in brief before selecting specific arrestor.

Therefore, the surge arrestor must be selected depending on the insulation coordination of the equipment.

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Rework Example 13.4 with $Z_{R} = 5 Z_{c}$ and $Z_{G} = \frac{Z_{c}}{3}$ .

As shown in Figure 13.34, an ideal current source consisting of a $10 - k A$ pulse with $50 - μ s$ duration is applied to the junction of a single-phase, lossless cable and a single-phase, lossless overhead line. The cable has a $200 - Ω$ characteristic impedance, $2 \times 10^{8} m / s$ velocity of propagation, and $20 - k m$ length. The overhead line has a $300 - Ω$ characteristic impedance, $3 \times 10^{8} m / s$ velocity of propagation, and $60 - k m$ length. The sending end of the cable is terminated by $400 - Ω$ resistor, and the receiving end of the overhead line is terminated by a $100 - Ω$ resistor. Both the line and cable are initially unenergized. (a) Determine the voltage reflection coefficients $T_{S}$ , $T_{R}$ , $T_{AA}$ , $T_{AB}$ , $T_{BA}$ , and $T_{BB}$ (b) Draw the Bewley lattice diagram for $0 \leq t \leq 0.8 m s$ . (c) Determine and plot the voltage $υ (0, t)$ at $x = 0$ versus time $t$ for $0 \leq t \leq 0.8 m s$ .

Figure 13.34

As shown in Figure 13.32, a single-phase two-wire lossless line with $Z_{c} = 400 Ω$ , $ν = 3 \times 10^{8} m / s$ and $l = 100 km$ has a $400 - Ω$ resistor, denoted $R_{J}$ , installed across the center of the line, thereby dividing the line into two sections, A and B. The source voltage at the sending end is a pulse of magnitude $100 V$ and duration $0.1 ms$ . The source impedance is $Z_{G} = Z_{c} = 400 Ω$ , and the receiving end of the line is short-circuited, (a) Show that

Figure 13.32

For an incident voltage wave arriving at the center of the line from either line section, the voltage reflection and refraction coefficients are given by

$Γ_{BB} = Γ_{AA} = \frac{(\frac{Z_{eq}}{Z_{c}}) - 1}{(\frac{Z_{eq}}{Z_{c}}) + 1}$ $Γ_{AB} = Γ_{BA} = \frac{2 (\frac{Z_{eq}}{Z_{c}})}{(\frac{Z_{eq}}{Z_{c}}) + 1}$

Where

$Z_{eq} = \frac{R_{J} Z_{c}}{R_{J} + Z_{c}}$

(b) Draw the Bewley lattice diagram for $0 \leq t \leq 6 Τ$ .

(c) Plot $υ (1 / 2, t)$ versus time $t$ for $0 \leq t \leq 6 Τ$ and plot $υ (x, 6 t)$ versus $x$ for $0 \leq x \leq l$ .

The single-phase, two-wire lossless line in Figure 13.3 has a series inductance $L = 0.999 \times 10^{- 6} H / m$ , a shunt capacitance $C = 1.112 \times 10^{- 11} F / m$ , and a $60 K m$ line length. The source voltage at the sending end is a ramp $e_{G} (t) = E t u_{- 1} (t) = E u_{- 2} (t) k V$ with a source impedance equal to the characteristic impedance of the line. The receiving-end load consists of a $150 Ω$ resistor in parallel with a $1 μ F$ capacitor. The line and load are initially unenergized. Determine (a) the characteristic impedance in $Ω$ , the wave velocity in , and the transit time in for this line; (b) the sending- and receiving-end voltage reflection coefficients in per-unit; (c) the Laplace transform of the sending-end voltage, localid="1656144662132" $V_{S} (s)$ ; and (d) the sending-end voltage localid="1656144667884" $v_{S} (t)$ as a function of time.

What is the frequency nadir?

See all solutions

Recommended explanations on Computer Science Textbooks

Computer Systems

Read Explanation

Big Data

Read Explanation

Game Design in Computer Science

Read Explanation

Theory of Computation

Read Explanation

Algorithms in Computer Science

Read Explanation

Data Representation in Computer Science

Read Explanation

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free