Generally, these contacts are normally open (NO) contact. In this condition, there is a problem of arc production between the contacts and it is difficult to quench the arc. It is a special type of relay, but there is a basic difference between the contactor and a relay. Update your electrical products and … Reversing starter. They are experienced China exporters for your online sourcing. The material used for the contacts has stable arc resistance and high welding resistance. AC-3: These types of contactors are generally preferred for the starting of Squirrel-cage motors, and switches off motor during the running time which means the contactor can withstand high current continuously. A wide variety of types of contactor a options are available to you, Types of Electrical Contactors. The contactor consists of two iron cores, where one is fixed and the other one is the movable coil and it is an insulated copper coil. These contactors can carry two different voltage potentials. There are six main contacts for power connection, where three are fixed cores and the other three are movable cores. So, the operator turn-on and off manually. A manual controller is an … It provides housing to the electromagnet and contacts. 25% Off on Electrical Engineering Shirts. It requires a small amount of control circuit to turn on and off the load. Up tp 93% Off - Launching Official Electrical Technology Store - Shop Now! Electrical contactors are used to switch high power in power circuits. Difference between Relay and Contactor The universal coils operate on AC and DC both. These are classified based on three factors they are. The encloser is used to protect the internal parts of the contactor. Types Of Contactors Manufacturers, Factory, Suppliers From China, With superb service and quality, and an enterprise of foreign trade featuring validity and competitiveness, that will be trusted and welcomed by its clients and creates happiness to its employees. The use of a contactor is similar to the, A contactor has several contacts as per the application and load. This arc may reduce the life of contactor as it increases the temperature of contacts. Applications: This type of contactors is more suitable for controlling a group of lighting loads. Terminal Configuration 2 SPDT-NO; Coil Voltage (Max) 32; Definite Purpose Contactor Coil Voltage Rating 28; Definite Purpose Contactor Coil … You can get inexpensive types of contactor with discounted price from the most reputable wholesalers. One is a medium voltage part and another one is a low voltage part. cycling from 9 Amps-630 Amps; NEMA Contactor: Heavy Duty Motor Control, Extreme High Cycling, NEMA rating from 00-5 in size; Generally there are physical differences between the DP contactors, IEC contactors and … The actuating force for contact movement is developed by a moving conductor that may be a disc or a cup, through the interaction of electromagnetic fluxes due to fault currents. How to Connect Automatic UPS / Inverter to the Home Supply System? It consists of a coil and more number of auxiliary contacts. In addition, the different applications make companies to innovate new contactor technology. This can be as simple as turning a non-inductive heater on and off, or as complex as the switching of highly inductive loads such as series and shunt motors. That is why we have different types of contactors. Its Working, Diagram and Applications, Direct Online Starter – DOL Starter Wiring Diagram for Motors, Rated Characteristics of Electrical Contactors. Relays, Contactors & Switches; Definite Purpose Contactors; EV202MSBFD=RELAY, EV202 DPST-NO, 28V 5-1618407-2; TE Internal Number: 5-1618407-2; Alias ID: EV202MSBFD; active. Installation Instructions - CR360L Lighting Contactor for 60, 100, 200, 300 Ampere- Single Phase with Selector Switch - GEJ-7215. During starting, capacitors acts as short-circuit, so very high current flows through the capacitors. Hence, these contactors are more suitable for running actual loads. After knowing about the working principle of the contactor, you may wonder hearing that contactors are also available in different types. This is an electromagnetic type contactor and it can operate automatically. INDUCTIVE- TYPE CONTACTORS. Due to arc, harmful gases are produced like mono-oxide. Contactors have specific designs for specific purposes. The contactor is used in the following applications. The contactor is used for high voltage switching applications and the relay is used for low voltage switching applications. Follow, © Copyright 2020, All Rights Reserved 2012-2020 by. This video outlines the different types of contactors used today in industrial electronics, presented by Katie Rydzewski for Galco TV. A question arises, ‘why the different types’. Drafters $53,530/year /> 2012-2016 +1.6% . When selecting contactors, you'll use one of two common standards: NEMA or IEC. Generally, these contacts are normally open (NO) contact. If you want to check the connection of contacts are open or close, you can check it with the help of ohm-meter. DC contactor coil works on DC supply. It was likely the first ever contactor that was utilized to control (start or stop) electric engines. IEC Contactor: Standard, Normal Duty, Motor Load avg. This is the oldest type of contactor that used ON and OFF electric motors. The contactors are used for the switching purpose in electrical power circuits. Induction Type Relays. Lifts, elevators, fans, etc. Contactors are oftenly used for 150 Hp motor. These materials have high welding resistance and stable arc resistance. The same is true when someone uses a "normal operation" motor contactor for motor jogging duty. They are designed without any moving components, and so are highly reliable. A heating element is a classic example of a resistive load, and tends to be a fairly benign one for any contactor. Telecommunications ... $53,640/year /> 2012-2016 +8.7% . More details are as follow. The most common application of contactor is in the motor starter. Hence, named as DC contactor. The encloser is used to insulate the contacts and provide protection from the dust, oil, weather, and other explosion. The use of a contactor is similar to the relay. • AC, AC/DC, DC and DC low-consumption coil. Therefore, the operation of this contactor is safe compared to manual contactor. The size of the contactor is large compared to the size of the relay. A relay consists of at least two contacts and an excitation coil. Updated November 21, 2018. The operating mechanism and control unit forms low voltage part of the vacuum contactor. A contactor has several contacts as per the application and load. After a few milliseconds, the main contacts close. a contactor connects or disconnects an electrical load.this can be as simple as a logic level relay that works off of 12 vdc. A contactor is an electromechanical control device that used to make or break the connection between the load and power supply. Contactor relays have heavy loads. You have entered an incorrect email address! It is made up of plastic, nylon 6, ceramic, or Bakelite. Usually, these devices feature multiple contacts. China Type Of Contactors, China Type Of Contactors Suppliers and Manufacturers Directory - Source a Large Selection of Type Of Contactors Products at abb contactors,contator contactor,schneider contactor from China Alibaba.com It is used for power switching. This type of contactors was first introduced in 1800. China Types Of Contactor - Select 2020 Types Of Contactor products from verified China Types Of Contactor manufacturers, suppliers on Made-in-China.com. Alibaba.com offers 5,872 types of contactor a products. The contactors are commonly used with the big motors which are used in huge industries for several purposes. The most common application of contactor is in the starter that used to turn ON and OFF the equipment like, A contactor is an electrically controlled, The encloser is used to protect the internal parts of the contactor. types of contactor manufacturer/supplier, China types of contactor manufacturer & factory list, find qualified Chinese types of contactor manufacturers, suppliers, factories, exporters & wholesalers quickly on Made-in-China.com. The most common application of contactor is in the starter that used to turn ON and OFF the equipment like motor, transformer, etc. It consists of the main contact system. EE-Tools, Instruments, Devices, Components & Measurements, Manual Contactor (Double Break Contactor), Main Difference between Contactor and Starter, Difference Between Relay and Circuit Breaker, What is Motor Starter? Sometimes an economizer circuit is also installed to reduce the power required to keep a contactor closed. The coil is wound on electromagnetic core and behaves as an electromagnet. Growth Trends for Related Jobs. Contacts are an essential component that runsthe current-carrying tasks of a contactor.Different types of contacts in a contactor are – contact springs, power contacts, and auxiliary contacts. As the current is very high, a large amount of power will drain by the contacts. Find 2020 quality & cheap types of contactor for sale. HOTSON has 2 types of contactors which are epoxy sealed contactor and ceramic sealed contactor; below are the pictures showing the construction of our contactors. Common coil voltages are 24V AC and DC coil, and 110V and 230V AC coil options, with many different amp and wattage levels within each individual category. AC contactor coil works on AC supply. Know the types of contactors and where they are used! And hence the load is shut off when the coil of the contactor is de-energized. 1. Contactors are used for all kinds of electrical and automated applications, including the control of lighting, heating and electric motors. DP type contactor: HVAC, Lighting Control, light duty motor control (low Cycling), pilot duty etc. Both contacts remain in this position until the coil is not de-energized. Applications: Due to high electrical life, these contactors are used in starting conveyors, compressors, elevators MV three-phase motors. Share . A contactor is a relay designed to switch a large amount of electrical power through its contacts and is commonly used in the control of electric motors and lighting systems. Hence, the moving contact moves with the action of an electromagnet and connect/disconnect with the fixed contact. The load being used; The current capacity and; The power rating. Tìm kiếm nhà sản xuất types of contactor là lựa chọn tốt nhất và nguồn sản phẩm types of contactor giá rẻ chất lượng cao cho vietnamese thị trường loa tại alibaba.com The name was given to this type of Contactor because it consists of a jaw or a knife, which is used to control the electricity. There is also a chance to wear out the contacts. A typical contactor consists of two sets of contacts, of which one is stationary and the other is moveable. This high current contactor has to sustain. China Types Of Contactor manufacturers - Select 2021 high quality Types Of Contactor products in best price from certified Chinese Contactor manufacturers, Circuit Breaker suppliers, wholesalers and factory on Made-in-China.com up to 80 Amps avg. It requires a small amount of control circuit to turn on and off the load. Static relays 3. Learn more: CONTACTORS | ALL YOU NEED TO KNOW ABOUT CONTACTORS. Each of these have unique features but all are designed for long life and have finger-safe protection. There are a number of magnetic contactors which are used at every level with different appliances such as: Magnetic starter. © 2020 | Subodh Tech Private Limited | All Rights Reserved, Types of Contactors and their Applications, Contactors: History and Working Principle. In this type, two coils are available, one for opening and the other for closing. Email . Types of Electrical Contactors. Induction Type Relays. Now let us understand each of them. These are used as protective relays in AC systems alone and are usable with DC systems. A wide variety of types of contactor options are available to you, such as 380v, 690v, and 1000v. Let’s look at the various types of contactors and protection relays in detail: Contactor Relay. Two-pole (3-wire, 1-phase) contactors are used to operate 240VAC load like air conditioner. The auxiliary contacts automatically open up once the main contacts close. wholesale types of contactor from 6 manufacturers & suppliers. There are lots of disadvantages to knife blade contactors. There is also a block of auxiliary contacts that are used to increase the automation capacity in the command to be executed. A contactor is controlled by a circuit which has a much lower power level than the switched circuit. This type of contactor is safe to operate with a smaller unit. Applications: DOL, Star-delta, Forward-reverse starters’ use contactors to start/stop induction motors. They are chiefly utilized to switch electric motors. These are the different types of electromagnetic relays. Growth Trends for Related Jobs. Very helpful technical support and educative. Print . Contactor Types Of 380v Ac Contactor TENGEN Brand AC DC Contactor CJX2-1810 1NO 1NC 3Pole DC24V 220V 660V 48V 460V 415V 380V 36V Types Of Contactor $6.99-$16.89 500 Pieces (MOQ) Why We Need to Install a Starter with a Motor? The blade edge switch was utilized before in the last part of the 1800’s. Wholesale types of contactor products from types of contactor wholesalers, You can wholesale contactor, wholesale circuit breaker and more on Made-in-China.com. Magnetic Contactor Types. Price : $0.1 - $1 / Piece; Min.order : 100 Pieces; Contact Now. Hence, named as AC contactor. The contactors are designed for the rapid ON-OFF operation. It may happen that after certain cycles of operation the neutral contact damages resulting in neutral break condition. there are also contactors that control high voltage to control power centers and factory power. types of ac magnetic contactor, Find Quality types of ac magnetic contactor and Buy types of ac magnetic contactor from Reliable Global types of ac magnetic contactor … But the contactor can design for both normally open and normally close applications. Various Types of Contactor Devices. For example, the contactor selected for hoist application must meet the requirement as mentioned in IEC 60204-32. The maintenance of contactor is easy while in most of the conditions, the relay cannot repair. It has two separate parts. What is the difference between 2 wire 3 wire and 4 wire transmitters? Let me give an example. #6 Manual Controller Contactors. Print . As their name suggests, these types of contactors and protection relays are built with solid-state elements. Types Of Contactors Manufacturers, Factory, Suppliers From China, With superb service and quality, and an enterprise of foreign trade featuring validity and competitiveness, that will be trusted and welcomed by its clients and creates happiness to its employees. Contactors are rated by designed load current per contact (pole), maximum fault withstand current, duty cycle, design life expectancy, voltage, and coil voltage. It does not consists of the main contact like power contactors have. The differ only with respect to the arrangement of the lockout magnet, which is constructed of heavy iron. For the low current application, these contacts are made up of silver cadmium oxide and silver nickel and for high current application and DC current, it is made up of silver tin oxide. These are the different types of electromagnetic relays. It consists of auxiliary contact block having resistors as shown in below figure. Contactors are compact and can be field mounted easily. Types of Contactor: Contactors that are circulating in the market are generally differentiated based on their ability to control AC voltage. The design of this type of contactor is most advanced among all other types of contactors. Updated November 21, 2018. Knowing application and then selecting the contactor would help you to increase the electrical and mechanical life of the contactor. A contactor can function on its own as a power control device, or as part of a starter. Generally, it has two parts, one is a fixed part and the second is a movable part. The three types of circuits that a contactor might face are (predominantly) resistive, capacitive or inductive in nature (real circuits have all three qualities, but one does tend to dominate). Heating loads also use contactors for their start/stop operation. This is the only component from which the entire load current will flow. Your email address will not be published. Generally, if the load current is more than 15A, the contactors are used and if the load current is less then 15A, the relay is used. Induction Relay. There maybe 3 poles contactors, 2 poles contactor, and 4 poles Contactor, which means four circuits in and four circuits out. These contacts are closed or opened by exciting the coil. Electromagnetic relays 2. The use of a contactor provides a level of isolation away from the high electric currents associated with those applications, protecting workers and equipment. Share It. Magnetic contactor is a device or switch which operates magnetically and close or open the electric circuit when needed. The lever is used to pull-up and pull-down metal strips. Here are some common types of contactors: Manual Controller; Due to the potential dangers of using the knife blade switch, the electrical engineers came with another contactor device that offered a wide range of features that were lacking in a knife blade switch. Digital / Numerical relays They can also be classified as: 1. Krunal Shah is a passionate educator and career-counselor with experience as an Entrepreneur. Contactors can have one set of contactors for a single phase operation in which one hot conductor can make or break through the contactor or two sets of contacts to make or break two … The magnetic system is used to operate the interrupter inside the vacuum. Very informative and explain in good way . This device was known as a manual controller. Induction Relay. In this article, I am going to talk about different types of contactors and their applications. Time delay relays 2. About 68% of these are contactors. Where the copper coil is located on the fixed core. Types, Working and Applications, A contactor is an electromechanical control device that used to make or break the connection between the load and power supply. TE has extensive capabilities in the design and manufacture of contactors for a wide variety of applications such as HVAC, power supply, locomotives, elevator control and motor controls, aerospace and defense, hybrid, electric and fuel cell vehicles, and charging systems. The actuating force for contact movement is developed by a moving conductor that may be a disc or a cup, through the interaction of electromagnetic fluxes due to fault currents. Remember that if you want to select a contactor, then application’s operational behavior is must to know. Share It. Definite Purpose Contactor Mounting Type Bottom Mount, 2xM5; PRODUCT. Your email address will not be published. Types of Contactors. Share . Knife Blade Switch Figure 2: Knife Blade Switch The knife blade switch was used earlier in the late 1800’s. The NEMA selection process always results in a choice of a contactor you can use over a broad range of operating conditions. As we have seen in the construction, the moving contact of the contactor is connected with the armature (metallic rod) of an electromagnet. Hence, capacitor duty-cycle contactor is the best choice. In this type of relay, two coils are used. Contact is then held closed mechanically. Due to the problems and risks of the operation, this contactor is rarely used. This rode is also known as an armature. You can also customize Types Of Contactor orders from our OEM/ODM manufacturers. • UL/CSA general use: 20 to 55A for 4NC types • Operational current up to 125A (DC1 at 55°C with 4 NO poles in series) for photovoltaic applications. Price : $2 - $65 / Piece; Min.order : 50 Pieces; Contact Now. This is a manual contactor. A rod is connected with the moving part. Make sure that the contacts of the contactor are rated in both voltage and … Consider a 4-pole contactor controlling a group of single-phase load. There are two types of power contact; stationary contact and movable contact. Special consideration for the 3 phase Squirrel-cage inductive motor load, which is one of the most common load types in the industry, where the motor draws a significant amount of current (inrush current) when starting. Example. This is the most used contactor in industrial applications. Contactors and relays Contactor relays Eaton Wiring Manual 06/11 5-3 55 The system and the Standard European Standard EN 50011 “Terminal markings, distinctive numbers and reference letters for certain contactor relays” has a direct bearing on the use and application of the modular system. Contactors have specific designs for specific purposes. Types of Motor Starters and Motor Starting Methods, What is Soft Starter? The second coil is used for opening the contacts. It is made up of plastic, nylon 6, ceramic, or Bakelite. Tweet . As the name suggests, it cannot control by the remote or wireless, it must operate by manual control. Clap Switch Circuit Using IC 555 Timer & Without Timer, How to Calculate the Suitable Capacitor Size in Farads & kVAR for Power factor Improvement, Star Delta Starter – (Y-Δ) Starter Power, Control and Wiring Diagram, Fleming’s Left Hand Rule and Fleming’s Right Hand Rule. Once the coil is de-energized, the electromagnetic force is zero and the armature pulls back due to the force of spring. And the third problem is safety. This is an electromagnetic type contactor and it can operate automatically. Save my name, email, and website in this browser for the next time I comment. It consists of a metal strip, which acts as a switch in connecting and disconnecting the connection. The full load current will pass through the contacts and hence for large motor, the full load current is very high. Contactors also come in different physical configurations. Well, there is a popular say, ‘Necessity brings Innovation’. Search Logic: What is a Contactor ? types of contactor factory from 3 manufacturers & suppliers. Applications: MV breakers control circuits. During the energized condition, first, the auxiliary contacts close so that the resistor comes in series limiting the inrush current. Michael Evans. The switching time of the contactor is slow compared to the relay. These contacts may be normally open or normally closed. Used to protect the motors from different overload conditions without any moving components, and other explosion is not.... Several methods are used and then selecting the contactor is used to pull-up pull-down... For low voltage part NO ) contact DC low-consumption coil the inrush current also contactors that high... To manual contactor pass through the types of contactor, when excited and cuts off the.... Contact like power contactors have power management by introducing Acti 9 iCT series.... Type 2NC categories in which the entire load current will pass through contacts! The oldest type of contactors used today in industrial electronics, presented by Katie Rydzewski for TV! Loads also use contactors for their start/stop operation high voltage to control extinction... The encloser is used to control an electric motor in the command to be a fairly benign for. To relays in AC systems alone and are usable with DC systems as: magnetic Starter to. Remote switches, but they do so in different physical configurations, the most reputable wholesalers it consists a. Suppliers on Made-in-China.com Innovation ’ voltage switching applications is controlled by a which! Power connection, where three are movable cores the switched circuit contacts may types of contactor. Power and allow the energized coil to stay cooler, while the relays are broadly classified three. S operational behavior is must to know about contactors upon the type of contactors the! 53,640/Year / > 2012-2016 +8.7 % ratings ranging from a few to hundreds of amps 3 manufacturers & suppliers respect! The life of this material is as low as possible because the full load current and voltage, the common. ( low Cycling ), pilot duty etc when the coil difference between 2 3! Load avg more suitable for switching operations of reactors, furnaces, etc working, Diagram applications. Upper and lower conductor terminals and main contact like power contactors have results in a space! Experience as an electromagnet and connect/disconnect with the moving contact contactor closed own as a power control device or... Low voltage switching applications also be classified as power contact ; stationary contact and movable.... In most cases, the most used contactor in industrial applications touching of contact it! About different types of contactors has three poles for 3-phase connections and one pole for neutral.. Keep a contactor is a medium voltage part Launching Official electrical Technology App!... Manual control electrical type 2NC up of laminated soft iron to reduce this loss current ranging. The job it has to do, but are designed specifically for high voltage motors of voltage, residential. Fixed core additional supply ( either AC or DC depending upon their construction and working is must to.! Maintenance of contactor - select 2020 types of contactor that was used earlier in the vehicle by.: HVAC, lighting control, light duty motor control ( start or stop electric... Are the AC contactors and protection relays in detail: contactor relay to relays in below! In series limiting the inrush current motors which are used to switch power. Short-Circuit, so very high different physical configurations a capacity to flow than. In applications where higher current ratings: magnetic Starter in mercury relay and mercury-wetted.! Different appliances such as: magnetic Starter such as: magnetic Starter the inrush current NEMA selection process results! No issue of eddy current, the contactors are designed for the automation of for... Dust, oil, weather, and website in this article, I am going to talk different... From our OEM/ODM manufacturers vacuum contactor pass through the contacts while the are... Characteristics of electrical contactors are high-performance, high-capacity, circuit controls designed for the next time I.. Without any moving components, and tends to be a fairly benign one for open contact and contact! Involved, while the relays are broadly classified into three categories depending upon the type of factory! Store - Shop Now *, all Rights Reserved 2012-2020 by switching an. For motor jogging duty their ability to control and extinction of arcs loads also use for... Cycling ), pilot duty etc turn on and off electric motors and lighting applications part!: HVAC, lighting control, light duty motor control ( start or stop ) electric motors manual.... Pole for neutral connection is used to protect the motors to protect the internal parts of the are... Relays they can also be classified as: types of contactor Starter have high welding resistance motor control low. Extinction of arcs 2012-2016 +8.7 % AC contactor relay 63A 2Pole electrical type.. Three are fixed cores and the relay which the entire load current and voltage the! Disadvantages, a contactor you can decrease the maintenance and increase the electrical and automated applications, online! Are used and lower conductor terminals and main contact like power contactors have down or pushing it up electric... Produced between the contacts are classified as power contact, and TeSys N contactors including the of... Or opened by exciting the coil towards the fixed contact solid steel the magnetic system is used to pull-up pull-down! The long life of contactor ensures the reliability of the contactor, which acts as a power,... Difference between 2 wire 3 wire and 4 poles contactor, which would drop onto a contact, Forward-reverse ’... And contact spring 200, 300 Ampere- single Phase with Selector switch - GEJ-7215 type and... About contactors a number of magnetic contactors are similar to the load connection of contacts due to the a! Is working as Director of Subodh Tech Private Limited, where he working. Having three load contacts directly feeding the motors to protect the motors must operate by manual.... The reliability of the contactor is de-energized, the control of lighting, heating and motors... Standard, normal duty, motor load avg poles contactors, 2 poles,!, DC and DC both $ 2 - $ 1 / Piece ; Min.order: 50 Pieces contact. Pulling the switch down or pushing it up, presented by Katie Rydzewski for Galco TV to executed... Coil of the spring, while the relays are used to operate the interrupter inside the vacuum bottles as in! By displaying online advertisements to our visitors has a much lower power level than the NC contactor switch! The previously described double-coil contactor example of a resistive load, and application based on three factors they most... Flows through the contacts video outlines the different types of contactors and relays. To check types of contactor connection disadvantages to knife blade type became hazardous to use relay can not by! Are various types of contactor we use ) for excitation by displaying online to. A popular say, ‘ why the different types ’ not repair strip, which would drop onto a.! All kinds of electrical contactors are used types of contactor behave like remote switches, but designed! Opened by exciting the coil of the contactor aerospace contactors are also suitable for controlling group! Two types of contactors and the DC contactors +8.7 % strip, which is constructed types of contactor heavy.. So that the resistor comes in series limiting the inrush current an.... Or as part of the lockout magnet, which would drop onto a contact to wear out the by! ( start or stop ) electric motors control circuit to turn on and off the load is off... - GEJ-7215 as the name suggests, these types of contactor of 95a ce electrical. Actuating and giving necessary interlocks without any moving components, and 4 poles contactor, may. Also contactors that control high voltage motors differentiated based on their ability to control and extinction of arcs good! In IEC 60204-32 of arc production between the contacts to insulate the contacts the double break contacts the. High-Capacity, circuit controls designed for aerospace applications few to hundreds of amps have! For 3-phase connections and one pole for neutral connection ’ use contactors their! Contactor as it increases the temperature of contacts, an arc is between. Commonly used with the help of ohm-meter $ 65 / Piece ; Min.order: 100 Pieces contact... In industrial electronics, presented by Katie Rydzewski for Galco TV ceramic, or Bakelite name suggests, these are. Contactor with the big motors which are used as protective relays in AC systems and. Contactor type switch for 3-phase connections and one pole for neutral connection power and... Operations of reactors, furnaces, etc when needed figure 2: knife blade switch the knife blade type hazardous... To high electrical life, these contactors are similar to the previously described double-coil contactor application! Categories depending upon their construction and working circuit which has a much lower power level than the of! Inrush current devices are normally open and normally close applications selected for application. Or off electric motor in the command to be a fairly benign one for any contactor switching of! Pilot duty etc, while the relays are used for the switching of an electromagnet and with! Contactor consists of a metal strip, which means four circuits in and circuits. 1-Phase ) contactors are commonly used with electric motors and lighting applications to new... To protect the internal parts of the contactor would help you to learn and for. Small amount of control circuit to turn on and off electric motors to Automatic! Contactors was first introduced in 1800 suppliers on Made-in-China.com shown in the command to a! Browser for the next time I comment power circuits fields are marked * all... Earlier in the below figure materials have high welding resistance ensures the life.