EBK ELECTRIC MOTOR CONTROL
10th Edition
ISBN: 9780100784598
Author: Herman
Publisher: YUZU
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Chapter 12, Problem 1SQ
To determine
Explain the typical uses of flow switches.
Expert Solution & Answer
Explanation of Solution
A flow switch is a device that can be placed into a pipe so that when an air or liquid flows against a device called paddle, a switch is activated. This switch either closes or opens an electrical contact. The electrical contacts may be wired to energize the motor starter coils, indicating lights or relays. The flow switch is also used to protect the damage of the device and also for protection of cooling circuits. Refer to Figure 12-2 in the textbook where the flow switch consists of both normally open and closed contacts. Flow switches are typically used in petroleum and chemical industries to sound alarm or light when signal flows and to sound warning light when flow stops.
Conclusion:
Thus, the typical uses of flow switches have been explained.
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Students have asked these similar questions
A single tone is modulated using FM transmitter. The SNR, at the input of the demodulator
20 dB. If the maximum frequency of the modulating signal is 4 kHz, and the maximum
equency deviation is 12 kHz, find the SNR, and the bandwidth (using Carson rule) at the
ollowing conditions:
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The circuit shown below on the left has the following parameters:
V₁ = 5 V.
R₁ = 40,
R₂ = 40,
α = 0.1.
This circuit can be replaced by an equivalent circuit shown below on the right such that the voltage and current received by an arbitrary load resistor RL, are identical
when connected to either circuits.
Determine the value of the resistor R (in ) in the equivalent circuit.
R₁
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b
1. Consider the following a unity feedback control system.
R(s) +
E(s)
500(s+2)(s+5)(s+6)
s(s+8)(s+10)(s+12)
-Y(s)
Find the followings:
a) Type of the system
b) Static position error constant Kp, Static velocity error constant Ry and Static
acceleration error constant Ka
c) Find the steady-state error of the system for (i) step input 1(t), (ii) ramp input t 1(t),
(iii) parabolic input t² 1(t).
2. Repeat the above problem for the following system.
R(s) + E(s)
500(s + 2)(s + 5)
(s+8)(s+ 10)(s+12)
Y(s)
3. Repeat the above problem for the following system.
R(s) +
E(s) 500(s+2)(s+4)(s+5)(s+6)(s+7)
s²(s+8)(s+10)(s+12)
Y(s)
Chapter 12 Solutions
EBK ELECTRIC MOTOR CONTROL
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