SYMBOLS FOR STATIC SWITCHING CONTROL DEVICES. ANTI- ...
ELECTRICAL CIRCUITS WITHOUT USE OF CONTACTS,. STATIC ... CIRCUIT
BREAKER.
INDUSTRIAL ELECTRICAL SYMBOLS . . .
LIMIT SWITCHES NORMALLY OPEN
NORMALLY CLOSED
HELD CLOSED
CIRCUIT BREAKER CIRCUIT BREAKER CIRCUIT BREAKER W/ THERMAL AND WITH THERMAL OL WITH MAGNETIC OL MAGNETIC OL
CIRCUIT INTERRUPTER
DISCONNECT
FOOT SWITCHES
HELD OPEN
SPEED (PLUGGING) F
PRESSURE AND LIQUID TEMPERATUREFLOW SWITCH VACUUM LEVEL ACTUATED (AIR, WATER, ETC.) SWITCHES SWITCH SWITCH
NO
NO
NO
NO
NO
NC
NC
NC
NC
NC
SYMBOLS FOR STATIC SWITCHING CONTROL DEVICES
ANTI-PLUG
F
STATIC SWITCHING CONTROL IS A METHOD OF SWITCHING ELECTRICAL CIRCUITS WITHOUT USE OF CONTACTS, PRIMARILY BY SOLID-STATE DEVICES. USE SYMBOLS SHOWN IN TABLE AND ENCLOSE THEM IN A DIAMOND.
F
INPUT COIL
R
OUTPUT NO
LIMIT SWITCH NO
LIMIT SWITCH NC
R
SELECTOR TWO-POSITION
J
THREE-POSITION
TWO-POSITION SELECTOR PUSHBUTTON SELECTOR POSITION
K
K
J
K
J
A1
K
L
A1
A1 A2
J
L
A1
X X
A2
A2
A
CONTACTS
B
1
2
3
4
X
B BUTTON
FREE DEPRESSED FREE DEPRESSED
A2
X
1 2 3 4
X-CONTACT CLOSED
A BUTTON X X
X
X
X - CONTACT CLOSED
X-CONTACT CLOSED
PUSHBUTTONS MOMENTARY CONTACT SINGLE CIRCUIT
DOUBLE CIRCUIT
MUSHROOM HEAD
NO AND NC NO
NC
©1999 American Technical Publishers, Inc.
MAINTAINED CONTACT WOBBLE STICK
TWO SINGLE CIRCUIT
ONE DOUBLE CIRCUIT
ILLUMINATED
R
. . . INDUSTRIAL ELECTRICAL SYMBOLS . . . OVERLOAD RELAYS
CONTACTS TIMED CONTACTS - CONTACT ACTION RETARDED AFTER COIL IS:
INSTANT OPERATING WITH BLOWOUT NO
WITHOUT BLOWOUT
NC
NO
ENERGIZED
NC
NOTC
THERMAL
MAGNETIC
DE-ENERGIZED
NCTO
NOTO
NCTC
SUPPLEMENTARY CONTACT SYMBOLS SPST NO SINGLE BREAK
SPST NC DOUBLE BREAK
SINGLE BREAK
SPDT DOUBLE BREAK
TERMS
SINGLE BREAK
DOUBLE BREAK
SPST SINGLE-POLE, SINGLE-THROW SPDT SINGLE-POLE, DOUBLE-THROW
DPST, 2NO SINGLE BREAK
DPST, 2NC
DOUBLE BREAK
SINGLE BREAK
DPST DOUBLE-POLE, SINGLE-THROW
DPDT
DOUBLE BREAK
SINGLE BREAK
DOUBLE BREAK
DPDT DOUBLE-POLE, DOUBLE-THROW NO NORMALLY OPEN NC NORMALLY CLOSED
METER (INSTRUMENT)
PILOT LIGHTS
TO INDICATE FUNCTION OF METER OR INSTRUMENT, PLACE SPECIFIED LETTER OR LETTERS WITHIN SYMBOL.
INDICATE TYPE BY LETTER
INDICATE COLOR BY LETTER NON PUSH-TO-TEST
AM or A V
AH A
AM
AMMETER AMPERE HOUR MICROAMMETER
mA
MILLAMMETER
PF
POWER FACTOR
V
VA
VOLTMETER
VAR
VARMETER
VARH
VARHOUR METER
PUSH-TO-TEST
R
A
WATTMETER
W
WATTHOUR METER
WH
VOLTMETER
COILS
INDUCTORS IRON CORE
DUAL-VOLTAGE MAGNET COILS HIGH-VOLTAGE LINK
AIR CORE
©1999 American Technical Publishers, Inc.
1
2
3
BLOWOUT COIL
LOW-VOLTAGE LINKS 4
1
2
3
4
. . . INDUSTRIAL ELECTRICAL SYMBOLS . . . TRANSFORMERS AUTO
AIR CORE
CURRENT
AUTOTRANSFORMER FOR REDUCEDVOLTAGE STARTING
CONTROL TRANSFORMER SINGLEVOLTAGE
DUALVOLTAGE H3
H1
H2
X2
%
50
50
65
65
80
80
100
100
0
0
H2
H1
X1
%
H4
X2
X1
AC MOTORS SINGLEPHASE T1
SEPARATE PHASE, TWO-SPEED T2
SEPARATE WINDING, TWO-SPEED
THREE-PHASE
HIGH
COM
LOW
T1
T2
T3
T1
T2
T1
T3
CONSTANT-TORQUE, TWO-SPEED
T11
T4
T1
T3
T3
CONSTANTHORSEPOWER, TWO-SPEED
VARIABLE-TORQUE, TWO-SPEED T4
WYE/DELTA, REDUCEDVOLTAGE
T2
T13
T1 T6
T3
T5
T2
T3
T5
T3 T5
T6
T6
T2
T5
T6
T2
DC MOTORS ARMATURE
T9
T4 T4
T2
T7 T8
T1
T1
T3
T5
T6
T2
WYE-CONNECTED, PART WINDING, REDUCED-VOLTAGE
T4 T1
T12
WIRING
SHUNT FIELD
SERIES FIELD
COMM OR COMPENS FIELD
SHOW 4 LOOPS
SHOW 3 LOOPS
SHOW 2 LOOPS
CONNECTIONS
NOT CONNECTED
POWER
WIRING TERMINAL
CONNECTED
CONTROL
GROUND
MECHANICAL
ARM
MECHANICAL INTERLOCK
CONTROL AND POWER CONNECTIONS-600 V OR LESS ACROSS-THE-LINE STARTERS 1 LINE MARKINGS
L1, L2
L1, L3 PHASE 1 L2, L4 PHASE 2
L1 IS ALWAYS UNGROUNDED
GROUND WHEN USED MOTOR RUNNING OVERCURRENT UNITS IN
2 , 4-WIRE
1 ELEMENT 2 ELEMENT 3 ELEMENT
CONTROL CIRCUIT CONNECTED TO FOR REVERSING INTERCHANGE LINES
©1999 American Technical Publishers, Inc.
3 L1, L2, L3 L2
L1 L1, L4 L1, L2, L3 L1, L2
L1, L3
L1, L2
L1, L3
L1, L3
. . . INDUSTRIAL ELECTRICAL SYMBOLS RESISTORS ADJUSTABLE BY FIXED TAPS
FIXED
CAPACITORS RHEOSTAT, POT, OR ADJUSTABLE TAP
FIXED
ADJUSTABLE
POLARIZED
RES
_
+ RES
H
RES
HEATING ELEMENT
BUZZER
BELL
FUSE POWER OR CONTROL
HORN, SIREN, ETC.
HALF-WAVE RECTIFIER
FULL-WAVE RECTIFIER AC
+
_
DC
DC
AC
BATTERY
SEMICONDUCTORS . . .
IGNITRON TUBE
THERMOCOUPLE
UNIDIRECTIONAL BREAKDOWN (ZENER) DIODE
TUNNEL DIODE
DIODE DOT IN TUBE DENOTES GAS _
+
. . . SEMICONDUCTORS . . . BIDIRECTIONAL BREAKDOWN DIODE
TRIAC (BIDIRECTIONAL TRIODE THYRISTOR)
PHOTOSENSITIVE CELL
SILICON CONTROLLED RECTIFIER
PROGRAMMABLE UNIT - JUNCTION TRANSISTOR (PUT)
. . . SEMICONDUCTORS TRANSISTOR PNP BASE
UNIJUNCTION TRANSISTOR NPN BASE
(C)
P BASE (C) (E)
(B)
N BASE (B2)
(E)
(B2)
(B)
(E)
©1999 American Technical Publishers, Inc.
(E)
(B1)
(B1)
