ELECTRIC GRAPHIC SYMBOLS

Industrial Automation

Pneumatic ? Instrumentation ? Automatisms ? Smarthome

tecnical.cat

ELECTRIC GRAPHIC SYMBOLS

3

or also

or also

Direct current

Alternating current

Conductor, Conductors Conductors

cable, line group

group

(three in this (three in this

case)

case)

T

connection

Junction with

connection

Fuse

Joint, connection point

G

G

Terminal

Terminal Strip

Battery or Generator,

accumulator. The long line indicates the

general symbol

positive pole

Generator

(rotary machine)

Ground

Mass or chassis

Resistor

Variable resistor

+

Potentiometer with

mobile contact

Coil, inductance

Inductance with

magnetic core

Condenser

Polarized condenser

Diode

Light emitting

diode (LED)

Zener diode

Bi-directional diode

thyristor Diac

Bi-directional Transistor

triode

NPN

thyristor

Triac

Transistor PNP

Field effect Field effect transistor transistor with N-type with P-type channel channel

Photoresistor

Photodio- Photovoltaic Phototran-

de

cell

sistor

Piezoelectric crystal

Normally Normally Normally Commutator Commutator Multi-posi- Normally

open switch open switch closed

(NO)

switch (NT)

with intermediate cut position

tion commutator

open manual control switch

Normally closed manual control switch

Ind. Estate Els Dolors ? 46-48 Sallent St. ? Manresa (Barcelona) ? +34 93 873 71 00 20 Fran?a St. ? Igualada (Barcelona) ? +34 93 806 62 62

Industrial Automation

Pneumatic ? Instrumentation ? Automatisms ? Smarthome

tecnical.cat

Normally Normally

closed switch open switch

retarded retarded

when

when

activated activated

Push-button switch with automatic

return

Proximity sensor

Normally open

proximity switch

Fe

or also

Normally open

contact sensitive

switch

Normally closed iron proximity

switch

Operating switch for temperature normally open

Relay coil

*

V

Slow connection relay

coil

Slow disconnect Relay Coil

Thermal relay coil

Normally Commutator

open contact relay

relay with delayed switch-off

Normally open

3-contact relay

Normally closed 3-contact relay

Display unit

Voltmeter

A

W

cos

Hz

n

*

Ammeter

Wattmeter, Galvanometer

Indication of the voltage terminals and

intensity

Potential Factor

Indicator

Gap

Frequency Tachome- Oscillosco- Registrar

indicator meter

ter

pe

*

Wh

Integrating device or counter

Active energy counter

varh

Reactive energy counter

Single-phase 2-winding transformer

Single Phase autotransformer

Three-phase transformer triangle-star singlewire

Three-phase transformer triangle-star multi-singlewi-

DC converter

re

Rectifier (converter AC to DC)

-+

or also

Inverter

Double Thermo pair

Bell

(converter DC a AC)

wave rectifier

(Polarity Signs, or thick

line for

negative)

Siren

Buzzer

M 3

Lamp

Three-Phase Squirrel Cage Induction Motor

Led Pilot

Ind. Estate Els Dolors ? 46-48 Sallent St. ? Manresa (Barcelona) ? +34 93 873 71 00 20 Fran?a St. ? Igualada (Barcelona) ? +34 93 806 62 62

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