Electrical Symbols Part2
1
. . . INDUSTRIAL ELECTRICAL SYMBOLS . . . VA VAR VARH W WH V PF mA A AH AM or A INDUCTORS COILS IRON CORE AIR CORE DUAL-VOLTAGE MAGNET COILS HIGH-VOLTAGE LOW-VOLTAGE COIL BLOWOUT 1 2 3 4 4 3 2 1 LINK LINKS METER (INSTRUMENT) PILOT LIGHTS LETTER TYPE BY INDICATE INDICATE COLOR BY LETTER NON PUSH-TO-TEST PUSH-TO-TEST PLACE SPECIFIED LETTER OR LETTERS WITHIN SYMBOL. TO INDICATE FUNCTION OF METER OR INSTRUMENT, AMMETER AMPERE HOUR MICROAMMETER MILLAMMETER POWER FACTOR VOLTMETER WATTHOUR METER WATTMETER VARHOUR METER VARMETER VOLTMETER V AM A R SUPPLEMENTARY CONTACT SYMBOLS SPST NO SPST NC SPDT TERMS BREAK SINGLE BREAK DOUBLE BREAK SINGLE DOUBLE BREAK BREAK SINGLE DOUBLE BREAK BREAK DOUBLE SINGLE BREAK BREAK DOUBLE SINGLE BREAK DOUBLE BREAK SINGLE BREAK DPST, 2NO DPST, 2NC DPDT SINGLE-THROW SINGLE-POLE, SPST SPDT SINGLE-POLE, DOUBLE-THROW SINGLE-THROW DOUBLE-POLE, DPST DPDT DOUBLE-POLE, DOUBLE-THROW NORMALLY OPEN NO NC NORMALLY CLOSED CONTACTS OVERLOAD RELAYS INSTANT OPERATING RETARDED AFTER COIL IS: TIMED CONTACTS - CONTACT ACTION THERMAL MAGNETIC WITH BLOWOUT WITHOUT BLOWOUT ENERGIZED DE-ENERGIZED NO NC NO NC NOTC NCTO NOTO NCTC ©1999 American Technical Publishers, Inc.
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Electrical
Transcript of Electrical Symbols Part2
. . . INDUSTRIAL ELECTRICAL SYMBOLS . . .
VA
VAR
VARH
W
WH
V
PF
mA
A
AH
AM or A
INDUCTORS COILS
IRON CORE
AIR CORE
DUAL-VOLTAGE MAGNET COILS
HIGH-VOLTAGE LOW-VOLTAGECOIL
BLOWOUT
1 2 3 4 4321
LINK LINKS
METER (INSTRUMENT) PILOT LIGHTS
LETTERTYPE BYINDICATE INDICATE COLOR BY LETTER
NON PUSH-TO-TEST PUSH-TO-TESTPLACE SPECIFIED LETTER OR LETTERS WITHIN SYMBOL.TO INDICATE FUNCTION OF METER OR INSTRUMENT,
AMMETER
AMPERE HOUR
MICROAMMETER
MILLAMMETER
POWER FACTOR
VOLTMETER
WATTHOUR METER
WATTMETER
VARHOUR METER
VARMETER
VOLTMETER
V
AM
A R
SUPPLEMENTARY CONTACT SYMBOLS
SPST NO SPST NC SPDT TERMS
BREAKSINGLE
BREAKDOUBLE
BREAKSINGLE DOUBLE
BREAK BREAKSINGLE DOUBLE
BREAK
BREAKDOUBLESINGLE
BREAKBREAKDOUBLESINGLE
BREAKDOUBLEBREAK
SINGLEBREAK
DPST, 2NO DPST, 2NC DPDT
SINGLE-THROWSINGLE-POLE,
SPST
SPDT
SINGLE-POLE,DOUBLE-THROW
SINGLE-THROWDOUBLE-POLE,
DPST
DPDT
DOUBLE-POLE,DOUBLE-THROW
NORMALLY OPEN
NO
NC
NORMALLY CLOSED
CONTACTS OVERLOAD RELAYS
INSTANT OPERATINGRETARDED AFTER COIL IS:
TIMED CONTACTS - CONTACT ACTION THERMAL MAGNETIC
WITH BLOWOUT WITHOUT BLOWOUT ENERGIZED DE-ENERGIZED
NO NC NO NC NOTC NCTO NOTO NCTC
©1999 American Technical Publishers, Inc.
