Ges full complement of definite purpose contactors 20a150a are utilized in a variety of industrial electric equipment. Tesys d contactors and reversing contactors are available from 9 a to 150 a inductive motor, and from 20 a to 200 a. The first three steps for selection will be the same. The mars series 903 relays are among the most popular relays used in air conditioning today. In addition to the simplicity which they offer in project engineering, panel building, commissioning and maintenance, the high. Timer and contactor wiring diagram pdf wiring diagram. Contactors are chosen upon the ampere ratings of the load. At schneider electric, our products and solutions cover the breadth of the industrial, infrastructure and building sectors, including everything from simple machines to complex process systems.
Motor starters, contactors, and relays all operate on the same basic principle. Many devices called relays use similar techniques and topologies. Contactors are used when no overload protection is necessary, and at lower levels of electrical current. Ac and dc contactor system dilm, contactor relays, 3 pole contactors up. Sometimes called ice cube relays because they are small and square and with clear plastic like an ice cube. Contactors require an additional supply either ac or dc depending upon the type of contactor we use for excitation. Large electric motors can be protected from overcurrent damage through the use of overload heaters and overload contacts. Holding circuit contact a normally open holding circuit contact for three wire control is provided on all contactors as standard. Contactors electromechanical relays electronics textbook. Control and chapterb11 tesys p c rotection omponents from. There are various types of control relays including machine tool relay, industrial relay and general purpose relay.
Possible to print the page to a pdf file or from your printer. The rib relay in a box pilot series includes ribu1c, ribu2c, ribh1c, ribh2c, ribh1s and more has 10a relay contacts and is used to control light electrical loads, dirve power relays or contactors, or. Miniature and motor contactors, auxiliary contactors. Contactors and control relays may be conveniently mounted using a 35mm din rail or by affixing with screws to a base plate.
Relay modules switch, isolate, and amplify signals reliably. Contactors and relays perform the same task of switching a circuit. They will replace the wressexrbm type 84 90290 thru 90295 quickconnect and screw terminal versions. Shop our parts hvac online store for transformers, contactors, and relays hvac supplies and accessories. The control relay is one of the oldest type of relay and perhaps the best known. However, the basic difference between the relay and contactor is that the contactor is used in applications with higher. Overload relays are provided to protect motors, motor control apparatus and motor branch circuit conductors against excessive heating due to motor overloads and failure to start. To complement the contactors, thermal overloads are offered for each frame size, available in several setting ranges. Relay a device by means of which contacts in one circuit are operated by a change in conditions in the same circuit or in one or more associated circuits contactor a device for repeatedly establishing and interrupting an electric circuit under normal conditions. To assemble fuseless motor feeders you must select combinations of motor protection. Relays and contactors use a variety of technologies to switch signals and power connections.
Nf contactor relays contactor relays for auxiliary. When a relay is used to switch a large amount of electrical power. Introduction a contactor is an electrical device which is used for switching an electrical circuit on or off. Mini contactors are space optimized control products for switching resistive or motor loads. Possibility of direct connection of the br 6 bimetal relay for protection against overload and in case of. Many devices called relays use similar techniques and topologies, but the terminology can be confusing. If the seriesconnected heaters get too hot from excessive current. Overload relays are designed to imitate on a much smaller scale the heating patterns of the electric motor it is installed in, and interrupt the current once the heat sensing mechanism in the relay reaches. Applications include lighting circuits, heaters, and transformers.
Miniature and motor contactors, auxiliary contactors and overload relays. However, the basic difference between the relay and. Contactor relays contactor relays contactor relays are often used in control and regulating functions. Featuring a conveniently compact size, a mechanical life rated at 10 million operations, and an electrical life ac3 rated in excess of 1 million operations at rated current. Top advantages of scr power controllers over contactors. Contactors and relays timing and special purpose relays moeller wiring manual 0205 59 5 function 11 ondelayed the control voltage us is applied via an actuating contact to the terminals a1 and a2. Identify maximum amperage and maximum voltage going through contacts. They are used in large quantities for the indirect control of motors, valves, clutches and heating equipment. These include heating, ventilating, air conditioning, refrigeration, food processing. For ac relays a distinction is made between synchronously. Eatons lighting contactors are designed to provide a safe, convenient means for local or remote switching of tungsten incandescent filament or ballast fluorescent and mercury arc lamp loads. Industrial relay system from coupling relay to replacement for small power contactors coupling relay between the controller and the field the rif0 and rif1 relay modules are used in particular to safely.
A variety of aerospace switches rocker, toggle, pushbutton and limit pilot controls including customized flap controls. The af contactor technology revolutionizes how we use contactors. What is the difference between a contactor and a relay. A4 iec contactors relays a4 springer controls company 96074 chester road, yulee, fl 32097 904 2250575 fax. Magnetic contactors and thermal overload relays sk series. Contactor relays are often used in control and regulating functions. Zerocross operating mode enables scrs to function comparably to contactors and solidstate relays, which operate by turning power fully on and. Component ratings provide the flexibility to choose the desired level of protection, up to the rated maximum, and use it. Contactor breakers limit switch no static control standard elementary diagram symbols.
When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name. Mini contactor relay dile,contactor relays, contactors up to 12 a ac3 at 400 v. Contactors, and relays for hvac are available at wholesale and quantity pricing. Electronic thermal overload relays for use with tesys d contactors adjustable electronic overload relay, multiclass, multiscale tesys lr9d from 0. Contactors up to 150 a for ac3 75 kw 400 v and 200 a for ac1 applications. If you see from the application point of view, you would have seen contactors placed in control panels of industrial motors. The diagram symbols in table 1 are used by square d and where applicable conform to nema national electrical manufacturers a ssociation.
Type s contactors are designed for operation at 600 volts, ac 5060 hertz. Magneticcontactors information subject to change without notice standard models series sk series frame 06 09 12 magnetic contactor appearance kkd14157 thermal overload relay appearance. Contactors and relays page contactor relays 52 contactors dil, overload relays z 58 contactors dil 514 overload relays z 520 zeb electronic overload relay 523 zev electronic motorprotective system 5. Starter contactor aka starter relay is an intermittent duty relay meaning it is designed to be turned on only for short periods of time. A contactor is a large relay, usually used to switch current to an electric motor or another highpower load. Technical documentation and guidelines to specify, select, test and maintain relays in a variety of applications. Abb offers a comprehensive selection of contactors for simple and extreme application as well as products with specific purposes. These contactors feature compact size, arc extinguishing mechanisms with a high breaking efficiency, low power consumption, easy operation, and ratings up to 660 volts.
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