EBK DELMAR'S STANDARD TEXTBOOK OF ELECT
6th Edition
ISBN: 9781305537125
Author: Herman
Publisher: YUZU
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Chapter 9, Problem 6PP
To determine
The Norton equivalent current and resistance across Terminals A and B.
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Z1
A B
Z2
Z3
+
Z4
1
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G
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2
Z8
Consider the system above with the zones of protection. Answer the questions below:
a) Which circuit breaker(s) should operate if there is a fault at position 1?
b) Which circuit breaker(s) should operate if there is a fault at position 2?
c) If the circuit breakers in case b fail to operate, which circuit breaker(s) should operate as a backup?
3. The three cylindrical resistors are all made of the same
material and have the same diameter but have different
R2
lengths. They are connected to an EMF as shown.
R1
Rank the currents through the resistors from largest to
smallest. Place an equal sign between any entries that
you think are equal.
а.
R3
LARGEST:
SMALLEST
b. Rank the voltage drops across the resistors from largest
to smallest. Place an equal sign between any entries
that you think are equal.
LARGEST:
SMALLEST
Determine the value of the voltage at Node 1 after 10 years. V Node1 =________________
Determine the value of i1 after 10 years. i1 =_______________, and determine the value of i2 after 10 years. i2 =________________
Determine the value of i3 after 10 years. i3 =________________
Chapter 9 Solutions
EBK DELMAR'S STANDARD TEXTBOOK OF ELECT
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