2basic electrical 2002
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Welcome to the KenworthElectr ical / Electronics Systems Training
Ray Brown (425-828-5315)
Cliff Williams (425) 828-5329
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Welcome to Kenworth
Electr ical / Electroni cs 1. Review voltage, resistance, and amperage
2. Kenworth power distribution and adding circuits
3. Kenworth wiring systems and using diagrams4. Basic diagnostics procedures5. Charge / Start Systems
6. Data Bus Testing7. Multi-plexing
8. Instrumentation & NBI9. Course review & exam
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Basic Electr ici ty
What is electricity?
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COPPER ATOM
ONLY ONE ELECTRON INOUTER VALANCE RING
Conductor - has 3 or lesselectrons in outer valance ring
Insulator - has more than 4electrons in outer valance ring
Semi-Conductor - has exactly 4
electrons in outer valance ring.
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Basic Electr ici ty Electricity is the flow of electronsfrom atom to atom in a conductor
Source
Load
Ground
Copper wire
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Basic Electr ici ty Unlike charges attract, causing a chain reaction of
electron movement By example, using a battery as a source with an
abundance of electrons as our source, the electronsflow to the load.
Source
Load
Ground Side
Copper wire
Close Switch
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Basic Electr ici ty
3 Basic Parts of Electricity
CurrentVoltage
Resistance
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Basic Electr ici ty
CURRENT The flow of electrons
through a conductor Current is measured
in amps with anammeter
1 amp = 6.28 billion
billion electrons persecond.
current is constant
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Basic Electr ici ty Current remains constant in a completecircuit, and can be measured anywhere inthe circuit
Source
Load
Ground
Copper wire
Close Switch
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Basic Electr ici ty
Voltage Electrical Pressure or
force that moves theelectrons
Voltage is lost or usedup, total volt drop isequal to applied volts.
Voltage is generated bybattery / alternator
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Basic Electr ici ty Voltage is present up to a open,like this switch, but withoutcurrent or electron flow
Load
Copper wire
Ground Side Open Switch
SourceVoltage
12.8 Volts
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Basic Electr ici ty
When the switch is closed the voltage isused by the load, and not present afterthe load in a good working circuit
Copper wire
Switch Closed
12.8 Volts
0 Volts
SourceVoltage
Load
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Basic Electr ici ty
Resistance A restriction to flow Causes voltage to be
used up. measured in Ohms
with an ohmmeter
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Basic Electr ici ty
Unwanted Resistance Caused By: dirt and corrosion loose or poor connections heat
too small a wire too long a wire
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Basic Electr ici ty
Relationship of Current, Voltage, and Resistance Increased Resistance = increased voltage loss. Increased voltage loss (volt drop) = decreased
current flow
Resistance
Current Flow
Constant Voltage
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Basic Electrical Principles For current to flow there must be a good,
complete circuit with the least amount ofunwanted resistance as possible. Wherever current originates it must return
to the original source. There will always be voltage up to the point
of an open in a circuit.
Voltage is divided up by total resistance inthe circuit (both wanted and unwanted)
All voltage should be used up after the load
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Basic Electr ici ty TYPICAL RELAY CIRCUIT
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Basic Electr ici ty TYPICAL RELAY CIRCUIT
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Basic Electr ici ty
30
8685
87
87A
REL AY BL OCK
30- POWER
85 AND 86 - CONTROLCIRCUIT
87A - NORMALLYCLOSED
87 - NORMALLY OPEN
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COURSE OUTL I NE
1. Introduction
2. Basic Electrical Review
3. Instructional Boards (Hands on)4. Kenworth Power Distribution (B-Cab, T2000, T300)
5. Adding Circuits6. Wiring Schematics
7. Basic Diagnostics8. Instrumentation (B-Cab) (Day 2)
9. Introduction to Multi-plexing
10. Charge / Start Systems11. T2000 Instrumentation (Day 3)
12. Introduction to Freedom Line Transmission13. E Version ABS with PLC
14. Certification Test
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