Relay Circuit Assignment - Job #10
Here are the tasks to complete for this assignment. You may want to print
this page. Check off each task when done. Then move on to the next task.
Definitions Before You Begin
Be sure you have an understanding of these terms before beginning this exercise. You may need to use a dictionary, a code book, a theory book, or even
ask other electricians you may know for help. This is part of the learning
activity. Begin now.
terminology
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definition
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short circuit
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complete circuit
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open circuit
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control voltage
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line voltage
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selector switch
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Read this
As background, here are some details which will help you understand this
assignment. If you encounter words, terms, phrases or abbreviations which you do
not understand, then stop. Research the meaning before going on. This is very
important to your learning activity. The essence of any technical education
activity is comprehensive understanding of all topics which are encountered.
Background Information
SOURCE
Here is a listing of various manufacturers of relays. Take about ten minutes to
look over these links.
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Welcome to the premier relays source. We have a broad range
of relays products and services which can be sourced using this
comprehensive vertical portal dedicated to helping in research and
purchasing.
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Below are some of our
most requested Relays categories. Click to view...
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Displaying 1 - 25 of 119 companies for the
search term: Relays
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1
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Regent
Controls, Inc. -- Shelton,
CT -- Complete Line Of Industrial Solid-State
Clutch/Brake Controls For All Electromagnetic
Friction-Type & Wrap-Spring Clutches. Applications
Support. Private Label Available. National
Distribution...![[more info]](expanded_info.gif)
Website
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Catalog | CAD
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2
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Magnecraft
& Struthers-Dunn -- Darlington,
SC -- Relays; General Purpose, Printed Circuit,
Solid State, Hermetic Sealed, Reeds, Power, High
Voltage, RF, Mercury Displacement. Time Delays &
Sensors; Input/Output Modules, Frequency, Current
Voltage, Relay Sockets. Standards & Specials.
Engineering...
Website
Class 711 Relay UL Recognition
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3
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Ross
Engineering Corp. -- Campbell,
CA -- Design & Mfr. High Voltage Test, Control,
Measurement & Safety Equipment, Including Fiber
Optic Systems, High Voltage Probes & Voltmeters, HV
Relays 12KV To 1000KV, 25A To 600A...
Website
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4
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5
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Line
Electric Products -- S
Glastonbury, CT -- Full Line AC Or DC Industrial
Rated Heavy Duty. Standard Or Customized To Fit
Application...
Website
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6
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Gigavac
-- Santa Barbara, CA --
Design & Manufacturer High Voltage Relays Including
High Voltage Ceramic Vacuum, Gas-Filled, RF & Reed
Relays...
Website
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7
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Jaxxen,
Inc. -- Norwalk, CT
-- Elesta Swiss Precision PCB Mounted Miniature To 16A,
Force Guided Contracts, Safety Relays, General Purpose
Plug-Ins, AC/DC Coils, Indicating, Diode.
Single/Multi-Pole, Sealed. Ul, CSA, TUV, VDE & ISO
9001 Certified....
Website
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8
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9
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Yaskawa
Electric America, Inc., Switch Div. --
Waukegan, IL -- Mfr., Design, High Power Reed
Switches, High Power I/O Reed Relays, Magnetic Proximity
Switches, Limit Switches, Push-Button Selector Switches.
Broad Control Load Switching Capability, Shock
Resistant, & Harsh Environments. AC & DC Loads
From Logic To Electromagnetic...
Website
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10
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Cougar
Electronics Corp. -- New
Haven, CT -- Printed Circuit, Automotive, General
Purpose, Time Delay, Reed, Latching, Sequence; Stepper
Relays & Contactors, Solid State, Power, Sensitive,
High Voltage, Industrial & Military, Sockets &
Accessories...
Website
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11
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Inland
Empire Components, Inc. --
Lake Elsinore, CA -- Worldwide ISO 9001:2000
Registered Independent Stocking Distributor Of Critical
Components For Board Level Reguirements. Suppliers Of
Semi Conductors, Tansistors, Diodes, Connectors,
Capacitors, Integrated Circuits, Relays, To Military,
Industrial & Commercial OEM/CEM Manufacturers. Hard
To Find, Ob...
Website
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12
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Relay
Service Company -- Chicago,
IL -- Manufactures electro-mechanical relays,
actuators/solenoids, mechanical leaf switches, AC
buzzers & coils. Custom & standard designs,
built to customer specs....
Website
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13
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Finder
Relays, Inc. -- Buford,
GA -- PCB Relays: Sub-Miniature & Miniature.
General Purpose Relays: Miniature, Miniature Power,
Octal Base, Power (Also Available In PCB Versions).
Step/Impulse, Lighting Relays, Timers, Relay Sockets
& Indicator, EMC Suppressor & Timer Modules...
Website
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14
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BTC
Electronic Components -- Raleigh,
NC -- Connectors & Accessories: Hermetically
Sealed, RF, Fiber Optic, D-Subminiature, Rack &
Panel, Printed Circuit, MIL-Circular, Firewall,
Back-Shells, Custom Connectors & Cable Assemblies.
IC Sockets, Tie-Wraps, Heat-Shrink Products, Terminal
Blocks. DIN Rail, Relay Sockets. QPL Approved...
Website
BTC Builds PC Mount Cylindrical Military
Type Connectors
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15
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16
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Sprecher
& Schuh -- Houston,
TX -- Develops, Mfrs. & Markets ISO
9001-Certified Motor Control & Protection Products.
Including Contractors, Starters, & Thermal Overload
Relays, Pilot Devices, Control & Timing Relays,
Rotary Cam Switches, Solid State Starters, Pushbuttons,
Terminals, Electronic Motor Protection Systems...
Website
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17
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Amps
Abundant -- Cypress, CA
-- Specializing In A Complete Selection Of Power
Rectifiers & Thyristors (SCRs), Diodes, & Solid
State Relays. Devices Range In Average Current From 22
Amps To 2500 Amps, & Voltages From 600 Volts To 4500
Volts...
Website
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18
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19
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Allied
Controls Inc. -- Waterbury,
CT -- Mfr. Of General Purpose Cradle Relays, Magnet
Latching Cradle Relays, Hermetically Sealed Relays,
Industrial/Military Relays & Sockets. UL, CSA &
QPL Product Approvals...
Website
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20
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21
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Infitec,
Inc. -- East Syracuse,
NY -- Mfr. Of Standard Solid State Time Delay Relays
& Timing Modules, AC Phase Controls, AC Current
Sensors & Controls For Vending, HVAC, Appliance
& Other Applications. Custom Controls & Wiring
Harness Products Available...
Website
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22
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Advance
Controls, Inc. -- Bradenton,
FL -- Printed circuit board relays & sockets to
mount heavy duty industrial relays. AC & DC coil
voltage; SPST, SPDT, DPDT, 3PDT & 4PDT. 6 DVC-110
DVC, 6-230 VAC; to 40 amp. Push to test buttons....
Website
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23
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24
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Erin
Electrical Enterprises, Inc. --
Boca Raton, FL -- Stocking Distributor Of A
Complete Line Of Electrical Supplies...
Website
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25
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Liberty
Electrical Supply Co. -- Brooklyn,
NY -- Full Line Distributor Electrical Equipment
& Supplies, Lighting, Elevator Parts &
Equipment, Datacom Equipment, Cabling, UPS Systems,
Local, National Warehousing Capabilities &
Responsive Service...
Website
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Go to the Diagram of this Job
Click HERE to go to the diagram, lecture, and picture for this exercise. Follow
the instructions found there. Then return to this page with your back button.
Connect the Components
Use the material list on the diagrams page to have ready all the components you
will need to complete this exercise. Connect all required components based on
the diagram.
Check your Connections
With the diagram as a guide, verify that all the connections have been made
properly.
Apply Power To Test
Wear safety glasses when testing this circuit. Locate the overcurrent protective
device for the circuit you will use. If possible, connect to a GFCI protected
circuit for the added safety. Be sure you have a full understanding of this circuit before applying power.
Then when you test the circuit, there should be no problem with it working
properly. Make corrections to the wiring as needed so the circuit works
properly. Memorize these connections.
Sketch the diagram from Memory
A sure way to determine if you have internalized this circuit is to draw a
sketch of the diagram from memory. You may choose to use a straight edge. But
that is not necessary. When you have completed the sketch, check it against the
diagram which is given for accuracy. Electricians must have the ability to
remember circuit connections without reference. Here is your chance to
demonstrate what you have learned. If you are unable to sketch the ladder
diagram from memory, refer back to the given ladder diagram. Then try again.
Repeat this activity until you feel confident that you can sketch this specific
diagram without reference.
Reconnect From Memory
Now on to the real test. Reconnect this diagramed circuit from memory. This will
ultimately tell you if you understand this circuit or not.
Review Before Answering Questions
Go back to review definitions, the diagram, the picture, your notes, your sketch
and any other details which will help you as you move on to the questions about
this diagram.
Answer the Questions
When you are satisfied that you can draw a sketch of the diagram, and wire it
all from memory, it is time to go on to answer questions about the diagram.
Click HERE to go to the questions.
Check Your Answers
When you have completed the questions, go on to check your answers. If you have
any which are different than the given answers, try to determine the reason. Go
back to the diagram. Research the question. Ask other electricians you may know.
But do all it takes to understand the correct answer to each question.
Click HERE to go to the answers.
Congratulations!
You have completed all ten assignments in Relay Circuits.
Click HERE to go to the Relay Circuits
Final Exam.
Click HERE if you would like a certificate of
completion.
Cheers:>)
David U. Larson
If you would like to research any of these topics further, enter the search
term in this Google Search Box:
Use these Relay Circuit links to go to where you left off in
your online activities.
Job
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Assignment
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Diagram
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Lecture
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Picture
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Questions
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Answers
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