Solder pin adapter for contactors and auxiliary contactors. A contactor can stand on its own as a power control device, or as part of a starter. Tesys d contactors and reversing contactors are available from 9 a to 150 a inductive motor, and from 20 a to 200 a resistive loads in 3pole and 4pole versions. Size 5 contactors, as well as size 6 and size 7 contactors, with normallyopen no poles have a sin gle coil. In particular, large electrical gear as generators, motors and. Automationdirect s covid19 related supply chain update currently shows we have our normal high levels of product inventory. Contactors free download as powerpoint presentation. Contactor definition of contactor by merriamwebster. Understand and learn about automation control systems and types of automation control systems. Relays are electrical switches that control a circuit.
Contactors are used by electrical equipment that is frequently turned off and on with the opening and closing of a circuit. Possible to print the page to a pdf file or from your printer. The two contactors are joined together with a mechanical interlock mechanism. Considered an essential business as defined by the cisa, we continue to fill customer orders in accordance with current rulings. Visit our applications section often as it is constantly being updated. When selecting contactors, youll use one of two common standards. Contactors electromechanical relays electronics textbook. Based solidfluid contacting two immobilized phase interfaces dispersive contactin. In most cases, the contactor does not simply wear out from normal use. Plentiful products enable easy selection of motor protection. Many devices called relays use similar techniques and topologies. When activated by current, a relay opens and closes a circuit to turn a larger. Contactors and thermal overload relays conform to the iec standard. Introduction to automation system sariati page 1 unit 1.
Electrical contactors, as shown in figure 1, are switches that are turned on and off with electrical power rather than with the direct push of a button or flipping a toggle switch. The function of the contactor is to make and break all power supply. Tesys iec contactors and starters steven engineering. However, like any other device, they are not infallible. Perhaps the most common industrial use for contactors is the control of electric motors. Contactors are useful in commercial and industrial applications, particularly for controlling large lighting loads and motors. Contactors terminal blocks circuit breakers contactors 884. The af contactor technology revolutionizes how we use contactors and allows use in all parts of the world and in all network conditions. Membrane contactors advanced membrane technology and. Electrical contractors provide services that keep our lives running smoothly. Using afs contactors saves money and precious space. Many control circuits include motor overload protection devices. They are ideal for resistive heating, for motors and compressors in air conditioning and refrigeration, as well as for food service equipment. Furthermore, minicontactor range offers compact dimensions and specific.
For all intent purposes, a contactor is a relay, as shown in figure 2. Unlike generalpurpose relays, contactors are designed to be directly connected to high. Relays, contactors, and motor starters provides an overview of the primary components involved in electric motor control. The more expensive the electrical gear, the greater the number of relays that will generally be used. Yc1nk selection by horsepower rating dc coil rated power hp per ac3 iec 6094741 rated power hp per ul508 csa c22. The dila and dilm7 to dilm38 contactors of the dilaxhir22 auxiliary contact are available specially for switching the smallest signals for electronic. Contactors range from those having a breaking current of several amperes to thousands of amperes and 24 v dc to many kilovolts.
In a given application, if the user does not know the value of the inrush current peak. Introduction to automation system general objectives 1. Application notes our goal is to provide you with the latest and best information on high voltage relay and sealed contactor applications. When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name. Both match a contactor with the job it has to do, but they do so in different ways. Apr 05, 2010 one of the main complaints about dp contactors in general is noise. We provide sustainable solutions that help our customers effectively manage electrical, hydraulic and mechanical power more safely, more efficiently and more reliably. Mechanically latched contactors and medium voltage motor controllers. They are designed to match numerous applications including.
Contactors typically have multiple contacts, and those contacts are usually but not always normallyopen, so that power to the load is shut off when the coil is deenergized. We would like to show you a description here but the site wont allow us. Relays are important in the control and protection of all types of large electrical gear. Contactors are most commonly used for controlling electric motors. Several types of contractors qualify as electricians. By design and construction they ensure potential isolation between the actuating circuit and the operating circuit, in the deenergized state, between the contact input and output. Like most threephase contactors, this ones coil is rated for 120 volts ac. Contactors and contactor assemblies digital asset management. Pdf electrical characterization of test sockets with. Abb library is a web tool for searching for documents related to abb products and services. When a relay is used to switch a large amount of electrical power. Guidelines for contactor inspection and maintenance abb aafline. In the automatic changeover switch for generator circuit diagram, the contactors are indicated kg for generator and km for mains. The contactor and motor protection range from abb is com patible with all major.
This statement also applies when electronic controls are the subject being studied. The physical size of contactors ranges from a device small enough to pick up with one hand, to large devices approximately a meter yard on a side. Contactors up to 150 a for ac3 75 kw 400 v and 200 a for ac1 applications. Catalog afs contactors dedicated for safety applications. The nema selection process always results in a choice of a contactor you can use over a broad range of operating conditions. The basics of contactors commercial electric products. The contactors are of unit construction with all rts assembled on a common frame.
The armature hinges on aknite edge beadng which requires little main tenance. Pdf membrane contactors are mostly dedicated to industrial degassing of liquids, and generally speaking, to gas transfer with fluids. Builtin surge suppression unlike conventional contactors, abbs afs contactors have builtin surge suppression, preventing surges from ever reaching the control circuit. Shop our parts hvac online store for transformers, contactors, and relays hvac supplies and accessories. Learn about the types of control system pneumatic control systems, hydraulic control systems and electrical control system. External contaminants on the surface of the contactor magnets can cause the contactor to buzz or hum at increased levels. Many experts agree that the best way to learn about motor controls is to start with the standard control methods covered in this textbook. It will not allow to both relays to be in a closed position. Definite purpose contactors provide high performance with flexibility and reliability and are designed to match numerous applications. This version of internet explorer is either no longer supported by microsoft, or is obsolete and some features of our store may no longer be supported. Presentation about contactors performance problems and solutions. Contactors are used in applications ranging from the light switch to the most complex, automated industrial equipment.
Contactors are used by electrical equipment that is frequently turned off and on opening and closing the circuit. Electrical characterization of test sockets with novel contactors article pdf available in ieee transactions on device and materials reliability 141. A contactor is an electrical device which is used for switching an electrical circuit on or off. Contactor definition is a device for repeatedly establishing and interrupting an electric power circuit under normal conditions. The employers liability insurance association demands that, for control systems of powerdriven metalwork. The basics of contactors contactors are useful in commercial and industrial applications, particularly for controlling large lighting loads and motors. The contactor relay contacts themselves constitute a considerable safety feature. Abb offers a comprehensive selection of contactors for simple and extreme application as well as products with specific purposes. Definite purpose contactors motor protection and control abb. Also find hard to find transformers, contactors, and relay replacement parts. Noark dp contactors provide high performance with both flexibility and reliability. Kp learn is kaiser permanentes enterprisewide learning management system lms, providing employees, physicians, and contingent workers with online access to learning resources. Relays and contactors use a variety of technologies to switch signals and power connections. All dil contactor relays have doublebreak contacts.
A complete collection of the product data sheets assembled in pdf format for your technical files. Mar 07, 20 contactors are used by electrical equipment that is frequently turned off and on with the opening and closing of a circuit. Check out the faqs and get help section below for job aids. Contactors, and relays for hvac are available at wholesale and quantity pricing.
For more information on machine safety applications using tesys d and tesys f contactors, refer to catalog mkted208051enus. Every time you turn on a light, fire up a computer or grab a drink from the fridge, you should thank an electrician for delivering the power you need. Contactors have specific designs for specific purposes. Possibility of direct connection of the br 6 bimetal relay for protection against overload and in case of phase failure. Well learn to identify the power contacts, the coil, and auxiliary contacts on both the schematic and representative examples and discuss the purposes and.
Contactors and starters eaton s mission is to improve the quality of life and the environment through the use of power management technologies and services. Contactors are used by electrical equipment that is frequently turned off and on opening and closing the circuit, such as lights, heaters, and motors. Whatever the application, the function of the contactor is always the same. Usually, the reason for contactor failure is misapplication. Although the electric motor may operate on threephase, 480 volt ac power, the contactor coil and the rest of the control circuitry operates on a lower voltage for reasons of safety. Find out how were doing our part to confront this crisis. Figure 1 electrical contactor figure 2 plugin relay. In other words, you can use a general purpose contactor to switch power in hvacr systems, but definite purpose contactors provide a cheaper option. A contactor is typically controlled by a circuit which has a much lower power level than the switched circuit, such as a 24volt coil electromagnet controlling a 230volt motor switch.