Tabela de Consulta de Símbolos de Quadros Elétricos e Abreviaturas de SLD

Component	Common Label	Function	Search Aliases
Circuit Breaker	ACB / MCCB / MCB / VCB / CB	Protection and switching	circuit breaker, breaker, CB, ACB, air circuit breaker, MCCB, molded case circuit breaker, moulded case circuit breaker, MCB, miniature circuit breaker, VCB, vacuum circuit breaker, Schneider breaker, Schneider ACB, Schneider MCCB, Schneider MCB, iC65, iC65N, iC60, Acti9, ComPacT NSX, Compact NSX, NSX, NSXm, EasyPact, EasyPact CVS, MasterPact, MasterPact MTZ, ABB breaker, ABB MCB, ABB MCCB, ABB ACB, S200, SH200, Tmax, Tmax XT, Emax, Emax 2, Siemens breaker, Siemens MCB, Siemens MCCB, Siemens ACB, SENTRON, 5SY, 5SL, 3VA, 3WL, 3WA, Eaton breaker, Eaton MCB, Eaton MCCB, Eaton ACB, FAZ, xPole, Power Defense, NZM, IZMX, INX, CHINT breaker, CHINT MCB, CHINT MCCB, CHINT ACB, NXB, NXB-63, NB1, NM8N, NM8, NA8, NA1
Isolator / Disconnector	DS / ISO	Safe isolation for maintenance	isolator, disconnector, disconnect switch, disconnecting switch, isolation switch, DS, ISO, switch disconnector, switch-disconnector, main isolator, main switch, Schneider disconnector, Schneider switch disconnector, Acti9 iSW, ComPacT INS, Interpact, ABB disconnector, ABB switch disconnector, OT switch disconnector, Siemens disconnector, Siemens switch disconnector, 3LD, SENTRON 3KD, Eaton disconnector, Eaton switch disconnector, P switch disconnector, Dumeco, CHINT disconnector, CHINT isolator, NH40, NHR17
Load Break Switch / On-load isolating switch	LBS	Switching normal load current	load break switch, load-break switch, LBS, on-load isolating switch, on load isolator, load switch, MV load break switch, MV switch, switch fuse, fuse switch, RMU switch, ring main unit switch, transformer feeder switch, Schneider LBS, Schneider load break switch, ABB LBS, ABB load break switch, Siemens LBS, Siemens load break switch, Eaton LBS, Eaton load break switch, CHINT LBS, CHINT load break switch, FN12, FN7, FLN36, gas insulated switch, air load break switch
Fuse	FU	Overcurrent and short-circuit protection	fuse, FU, F, LV fuse, MV fuse, HRC fuse, cartridge fuse, NH fuse, fuse link, fuse holder, fuse switch, fuse switch disconnector, backup fuse, current limiting fuse, gG fuse, aM fuse, Schneider fuse, Schneider fuse holder, TeSys fuse, ABB fuse, ABB fuse switch, OFAF, OS fuse switch, Siemens fuse, Siemens fuse switch, SITOR, 3NA, 3NP, Eaton fuse, Eaton Bussmann, Bussmann fuse, CHINT fuse, CHINT fuse holder, RT18, NT fuse, XRNT, high voltage fuse
Busbar	BB	Power distribution inside switchgear	busbar, bus bar, BB, main busbar, copper busbar, aluminium busbar, aluminum busbar, Cu busbar, Al busbar, neutral busbar, earth busbar, PE busbar, N busbar, 3P busbar, 3P+N busbar, 3P+N+PE, busbar system, busbar trunking, busbar chamber, busbar rating, rated current busbar, short time withstand current, Icw, bus coupler, bus tie, main bus, distribution busbar
Current Transformer	CT	Current measurement and protection input	current transformer, CT, current transducer, metering CT, protection CT, measuring CT, ring CT, split core CT, wound CT, bar primary CT, window CT, LV CT, MV CT, CT ratio, 100/5A, 200/5A, 400/5A, 800/5A, 1000/5A, 2000/5A, 1A CT, 5A CT, Class 0.5, Class 0.2, 5P10, 5P20, 10P10, 10P20, burden, VA burden, Schneider CT, Schneider current transformer, ABB CT, ABB current transformer, Siemens CT, Siemens current transformer, Eaton CT, Eaton current transformer, CHINT CT, CHINT current transformer
Voltage Transformer	VT / PT	Voltage measurement and protection input	voltage transformer, potential transformer, VT, PT, voltage transducer, metering VT, protection VT, measuring VT, MV VT, PT ratio, VT ratio, 11kV/110V, 10kV/100V, 6.6kV/110V, 400V/110V, single phase VT, three phase VT, voltage measurement, voltage sensing, Schneider VT, Schneider PT, ABB VT, ABB PT, Siemens VT, Siemens PT, Eaton VT, Eaton PT, CHINT VT, CHINT PT
Protective Relay (generic)	OCR / EFR / Relay	Fault detection and trip command	protective relay, protection relay, relay, OCR, overcurrent relay, EFR, earth fault relay, ground fault relay, ELR, earth leakage relay, differential relay, motor protection relay, transformer protection relay, feeder protection relay, digital relay, numerical relay, protection device, trip relay, ANSI 50, ANSI 51, 50/51, 50N, 51N, 50G, 51G, 27, 59, 87, 49, 46, 47, 81, Schneider relay, Easergy, Sepam, MiCOM, ABB relay, Relion, REF615, Siemens relay, SIPROTEC, Eaton relay, CHINT relay, protection controller
Measuring Instrument / Power Meter	PM / MFM / kWh Meter	Electrical measurement and monitoring	measuring instrument, meter, power meter, PM, MFM, multifunction meter, multi-function meter, kWh meter, energy meter, ammeter, voltmeter, frequency meter, power factor meter, PF meter, panel meter, digital meter, smart meter, power monitor, energy monitor, V meter, A meter, kW meter, kVA meter, kvar meter, RS485 meter, Modbus meter, Schneider meter, PowerLogic, PM5000, PM8000, iEM, ABB meter, M2M, EQ meter, Siemens meter, SENTRON PAC, PAC3200, PAC4200, Eaton meter, Power Xpert Meter, CHINT meter, DDSU, DTSU, DTS, DJS, PD666
Earthing Switch	ES	Safety grounding during maintenance	earthing switch, earth switch, grounding switch, ground switch, ES, E/S, maintenance earthing switch, MV earthing switch, switchgear earthing switch, safety grounding, safety earthing, short circuit earthing, earthing device, grounding device, earth position, earthed position, Schneider earthing switch, ABB earthing switch, Siemens earthing switch, Eaton earthing switch, CHINT earthing switch
Transformer	TR / TX	Voltage conversion	transformer, TR, TX, power transformer, distribution transformer, dry type transformer, oil immersed transformer, oil transformer, cast resin transformer, control transformer, auxiliary transformer, isolation transformer, step down transformer, step up transformer, 11kV/0.4kV, 10kV/0.4kV, 6.6kV/0.4kV, 400V/230V, 1600kVA, 1000kVA, 2500kVA, Schneider transformer, ABB transformer, Siemens transformer, Eaton transformer, CHINT transformer
Surge Protective Device (LV) / Surge Arrester (MV)	SPD / SA	Transient overvoltage protection	surge protective device, surge protection device, surge protector, SPD, surge arrester, SA, lightning arrester, LA, lightning protection, transient overvoltage protection, overvoltage protection, Type 1 SPD, Type 2 SPD, Type 1+2 SPD, T1 SPD, T2 SPD, Class I SPD, Class II SPD, 3P SPD, 3P+N SPD, 40kA SPD, 60kA SPD, 100kA SPD, 275V SPD, MV surge arrester, metal oxide arrester, MOA, ZnO arrester, Schneider SPD, Acti9 iPRD, ABB SPD, OVR, Siemens SPD, 5SD7, Eaton SPD, CHSPT, CHINT SPD, NU6, NXU, CHINT surge arrester
Motor	M / Motor	Electrical load controlled by an MCC or feeder circuit	motor, electric motor, induction motor, pump motor, fan motor, compressor motor, MCC load, motor feeder
Contactor	KM / MC	Electrically switches a motor or load circuit by control signal	contactor, magnetic contactor, motor contactor, KM, MC, Schneider LC1D, ABB AF, Siemens 3RT, CHINT NC
Thermal Overload Relay	OLR / TOR / FR	Protects motors against overload current	overload relay, thermal overload relay, motor overload, OLR, TOR, FR, Schneider LRD, ABB TF, Siemens 3RU
Motor Starter	Starter	Starts and controls motor operation	motor starter, direct online starter, DOL starter, star delta starter, motor feeder, MCC starter
Soft Starter	SS	Reduces motor starting current and mechanical shock	soft starter, motor soft starter, reduced voltage starter, Schneider ATS22, Schneider ATS48, ABB PSTX, Siemens SIRIUS soft starter
Variable Frequency Drive	VFD / Inverter	Controls motor speed by changing frequency and voltage	VFD, variable frequency drive, inverter, frequency converter, AC drive, motor drive, speed control
Star-Delta Starter	Y-Δ / Star Delta	Starts larger motors by switching winding connection	star delta starter, wye delta starter, Y delta, motor starting, reduced voltage starting
Control Transformer	CPT / Control TX	Provides control voltage for relays, contactors, lamps, and control circuits	control transformer, CPT, control power transformer, auxiliary transformer, 220V control, 110V control, 24V control
Push Button	PB / Start / Stop	Manual input for starting, stopping, or resetting equipment	push button, start button, stop button, reset button, PB, momentary switch, control button
Selector Switch	SS / COS / HOA	Selects operating mode such as auto/manual or local/remote	selector switch, changeover switch, auto manual switch, local remote switch, HOA switch, hand off auto
Indicator Lamp	PL / Pilot Lamp	Shows power, running, fault, trip, or status indication	indicator lamp, pilot lamp, signal lamp, power lamp, running lamp, fault lamp, trip lamp
Emergency Stop	E-Stop / ES	Stops equipment quickly in emergency conditions	emergency stop, E-stop, emergency push button, safety stop, mushroom button
Auxiliary Relay	KA / K	Provides control logic, signal transfer, or interlocking	auxiliary relay, control relay, intermediate relay, KA, relay logic, interposing relay
Timer Relay	KT / Timer	Provides time delay in control circuits	timer relay, time delay relay, KT, on delay timer, off delay timer, star delta timer
Auxiliary Contact	NO / NC	Provides status feedback or control contact signal	auxiliary contact, NO contact, NC contact, normally open, normally closed, feedback contact
Terminal Block	TB / XT	Connects internal and external control wires	terminal block, terminal strip, TB, XT, wiring terminal, control terminal
Automatic Transfer Switch	ATS / ATSE	Transfers load between normal and backup power sources	ATS, ATSE, automatic transfer switch, transfer switch, dual power switch, automatic changeover switch
Generator	G / GEN / DG	Backup power source for emergency or standby supply	generator, genset, diesel generator, DG, standby generator, emergency generator
Three-Phase Star / Wye Winding	Y / Wye / Star / Yn	Shows three windings connected to a common neutral point. The neutral may be brought out or grounded.
Three-Phase Delta Winding	Δ / Delta / D	Shows three windings connected in a closed delta loop. Normally there is no neutral point.

Esta tabela de símbolos de quadros elétricos foi concebida para uma consulta rápida ao ler SLDs, desenhos de quadros elétricos, ficheiros de concursos e documentos de orçamentação.

Os símbolos apresentados nesta tabela são exemplos de referência simplificados baseados nas convenções de símbolos gráficos IEC 60617. Os desenhos de projeto reais podem variar consoante o consultor, o fabricante, o país ou a norma do projeto

–Risentric: onde o brilho aumenta

Para soluções de quadros fabricados, consulte a nossa página de quadros elétricos de baixa tensão.
Para explicações detalhadas de cada dispositivo dentro de um painel de quadro elétrico, consulte o nosso guia: Componentes de Quadros Elétricos Explicados.
Para a seleção prática de disjuntores a partir de desenhos e ficheiros técnicos, consulte o nosso guia sobre como selecionar disjuntores a partir de SLD e ficheiros técnicos.

Como Utilizar Esta Tabela de Símbolos de Quadros Elétricos

Utilize a caixa de pesquisa para encontrar um símbolo de quadro elétrico, abreviatura, nome de componente ou série de produto.

Por exemplo, se vir CT num SLD, pesquise “CT” para encontrar Transformador de Corrente (TI). Se vir iC65 num ficheiro de orçamento, pesquise “iC65” para encontrar a categoria relacionada de Disjuntor / MCB.
Pode pesquisar por abreviatura, nome do componente ou séries de produtos comuns. Por exemplo, pesquise CT, ACB, LBS, SPD, iC65, Tmax, 3VA ou NXB para encontrar o componente de quadro elétrico relacionado.

Cada símbolo ou nome de componente também pode ter uma ligação para uma explicação detalhada, guia de seleção ou página de produto relacionada.

Procura quadros e painéis testados em fábrica para o seu projeto?

Explore as nossas soluções de switchgear/quadro de distribuição.

Notas para Símbolos Comuns de Quadros Elétricos

A tabela acima foi concebida para uma pesquisa rápida. As notas abaixo mostram como cada símbolo ou abreviatura é habitualmente escrito em SLDs, desenhos de quadros elétricos, ficheiros de concursos e documentos de orçamentação.

Símbolo de Disjuntor — ACB / MCCB / MCB / VCB / CB

Um símbolo de disjuntor marca normalmente um ponto de proteção e comutação no circuito de potência principal. Nos desenhos de quadros elétricos, pode representar um disjuntor de entrada, um disjuntor de saída, um acoplador de barras ou uma entrada principal.

As etiquetas comuns incluem ACB, MCCB, MCB, VCB ou CB.