Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN: 9781337399128
Author: Russell E. Smith
Publisher: Cengage Learning
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Textbook Question
Chapter 12, Problem 1RQ
What is the advantage of using solid-state devices in electronic control systems?
Expert Solution & Answer
To determine
The advantage of electronic control systems using solid state devices.
Explanation of Solution
The term "solid state" and "semi-conductor" refers to the same electronic component; and signifies the different properties of electronic component. The term "solid state" indicates the physical description of component and the term "semi-conductor" refers to the electrical conductivity of component. The advantages of solid-state devices are smaller in size, ruggedness construction, increased life, speed response, and resistance to extreme environmental conditions.
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Section 5-2: Line Diagrams-Signals,
Decisions, and Actions
In the following application, a temperature switch controls a heating contactor and a flow switch is used to
ensure there is enough air flow. If there is not enough air flow, an alarm is sounded. Complete the required
information.
1. List all the signal devices in the circuit.
2. List all the action devices in the circuit.
3. List the decision part of the circuit that automatically sounds the alarm if there is a problem.
4. When the heating element is on during normal operation, is the flow switch open or closed?
CIRCULATING
2
L1
FAN
TEMPERATURE
SWITCH
TR
HEATING
ELEMENTS
FLOW
SWITCH
-HOT AIR
PADDLE
AIR FILTER
NORMALLY CLOSED
FLOW SWITCH
65
ALARM
(SOUNDS IF NO FLOW FOR
15 SECONDS OR MORE)
Date
HEATING
CONTACTOR
TR
ON-DELAY
TIMER
SUPPLY AIR
COLD AIR
(3) TIME SET= 15 SEC
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Chapter 12 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
Ch. 12 - What is the advantage of using solid-state devices...Ch. 12 - Semiconductors are...Ch. 12 - Diodes and rectifiers allow current to...Ch. 12 - What is the difference between a diode and...Ch. 12 - A thermistor is a resistor that changes resistance...Ch. 12 - What are the two types of thermistors and how are...Ch. 12 - What materials are used to make semiconductors?
Ch. 12 - What is a transistor?
Ch. 12 - The transistor is used ____________.
as a...Ch. 12 - Briefly explain the rectification circuit shown in...
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