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4.0 Glossary (General Denitions and Symbols)

SECTION 4 GLOSSARY

PLUG

CONNECTION

Variously configured male/female separable connectors.

DESCRIPTIONSYMBOL

NOTATION

NAME VALUES

SOL n SOLENOID Electro-magnetically operated valve.

M n MOTOR n Ø,HP,V

THERMAL

T SW n Protective device that protects circuits from over temperature.

SWITCH

Q n TRANSISTOR

THERMISTOR

TEST POINTTP n Dedicated location for obtaining quantification.

RELAYK n

Produces light by heating a filament.

WIRE NODE Schematic representation of physical connection of wires.

n MHzY n

CRYSTAL

Device using the mechanical resonance of a physical crystal of piezo-

electric material to create an electrical signal with a very precise

frequency.

A device which converts electrical energy to mechanical energy (motion).

n A, n V

LAMP

NEUTRAL

Electronic neutral or common.

Electro-mechanical device for opening / closing a circuit.

A resistor whose resistance changes with temperature.

A transistor amplifies current.

A small base current controls the larger collector current.

Base

Emitter

Collector

ltr

CONTENTS

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