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. The current passing through the contactor excites the electromagnet. Iecrated contactors usually handle hvac applications elsewhere. Selection guide tesys contactors tesys d contactors.
In this article, i am going to talk about different types of contactors and their applications. The largescale revamp calls for the coordinated skills of all three types of electrical contractors. Contactors electromechanical relays electronics textbook. Contactors, overloads and manual motor starters carlo gavazzi. There are different types of contactors like, contactor springs, auxiliary contactor power contactor and capacitor duty contactor. Each type of contact has an individual role to play. All dil contactor relays have doublebreak contacts. Definitepurpose contactors can also be found in other types of heating, cooling, and refrigeration applications.
Several types of contractors qualify as electricians. Contactors are most commonly used for controlling electric motors. 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. Introduction global leader in industrial control devices. When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name. Two typical manual contactors still in use today engineers eventually made a breakthrough with the magnetic contactor. Knife blade switch the knife blade switch was used earlier in the late 1800s. A magnetic contactor is operated electromechanically without manual intervention.
Csa bf09bf95 and b115b400 contactors are also csa certified, for canada only file 54332. 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. The electromagnet or coil provides the driving force to close the contacts. Selection guide tesys contactors tesys d low consumption contactors. Integrated building systems contractors integrated building systems ibs electricians also called voicedatavideo electrical vdv contractors primarily work with technologies that make houses and offices functional abodes and workspaces. The contactor relay contacts themselves constitute a considerable safety feature. After knowing about the working principle of the contactor, you may wonder hearing that contactors are also available in different types. There are different types of contacts in a contactor namely, contact springs, auxiliary contacts, and power contacts. Pages contactors 245012 to 245025 reversing contactors 245032 to 245103 1 with low consumption kit la4 dbl see page 245117. If you still do not know about the basics of contactors, no worries, you can find information in this article contactors.
In semiconductor testing, contactor can also refer to the specialized socket that connects the. General information technical data nema eemac ratings pdf. Types of contactors and their applications engineers hub. Contactors are type of device which is used for establishing and interrupting current under some controlled or normal conditions. In addition, bf12, bf25, bf38 and bf65 type are csa certified as elevator equipment file 54332, class 2411. The enclosure is a frame housing the contacts and the electromagnet. Contactors can be combined with either manual motor starters of the sm series, providing thermal and magnetic protection up to 100a, or single or threepole thermal bimetallic overload relays, with or without singlephase protection up to 420a, to obtain nonreversing or reversing starters.
The contacts are the currentcarrying part of the contactor. Cslb descrition of classifications 4 california contractors state license board c7 low voltage systems a communication and low voltage systems contractor installs, services and maintains all types of communication and low voltage systems which are energy limited and do not exceed 91 volts. There are various types of contactors, and each type has its own set of features, capabilities. Contactors can break current over a wide range of currents, from a few amperes to thousands of amperes, and voltages from 24 vdc to thousands of volts. For b500, b630 and b630 types, ul listing is pending completion at time of catalogue printing. Contactors and relays contactor relays eaton wiring manual 0611 53 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. It was probably the first ever contactor that was used to. Suitable surge supressor types lszd0005, lszd0006 and lsz00001 to lsz00003. The excited electromagnet produces a magnetic field, causing the contactor core to move the armature. Working of a contactor different types of contactor devices 1. Electrical contractors provide services that keep our lives running smoothly. The contacts of the contactors are known for their rapid open and close action. W lsd contactors for switching motors ac3 3pole, size 0 w schrackinfo auxiliary contact and contact block types lsz0d. The contactor relay contacts themselves constitute a.
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