Types of contactors pdf

There are various types of contactors, and each type has its own set of features, capabilities. Exceptional duty cycles or specialized motor types may require a different nema starter size than the nominal rating. 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. Contactors electromechanical relays electronics textbook. Types of contactors and their applications engineers hub. 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. Working of a contactor different types of contactor devices 1. The contactor relay contacts themselves constitute a. Pages contactors 245012 to 245025 reversing contactors 245032 to 245103 1 with low consumption kit la4 dbl see page 245117. Enclosures are made of insulating materials such as bakelite, nylon 6, and. Introduction global leader in industrial control devices. 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.

After knowing about the working principle of the contactor, you may wonder hearing that contactors are also available in different types. 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. Contactors, overloads and manual motor starters carlo gavazzi. Iecrated contactors usually handle hvac applications elsewhere. All dil contactor relays have doublebreak contacts.

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. General information technical data nema eemac ratings pdf. Selection guide tesys contactors tesys d low consumption contactors. This includes power contacts, auxiliary contacts, and contact springs. Definitepurpose contactors can also be found in other types of heating, cooling, and refrigeration applications. Contactors are most commonly used for controlling electric motors. The contacts of the contactors are known for their rapid open and close action. Selection guide tesys contactors tesys d contactors. The excited electromagnet produces a magnetic field, causing the contactor core to move the armature. W lsd contactors for switching motors ac3 3pole, size 0 w schrackinfo auxiliary contact and contact block types lsz0d. When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name. The current passing through the contactor excites the electromagnet.

Knife blade switch the knife blade switch was used earlier in the late 1800s. Variations of manual contactors are still in use today. There are different types of contactors like, contactor springs, auxiliary contactor power contactor and capacitor duty contactor. Contactors are type of device which is used for establishing and interrupting current under some controlled or normal conditions.

A magnetic contactor is operated electromechanically without manual intervention. The largescale revamp calls for the coordinated skills of all three types of electrical contractors. For b500, b630 and b630 types, ul listing is pending completion at time of catalogue printing. If you still do not know about the basics of contactors, no worries, you can find information in this article contactors. The electromagnet or coil provides the driving force to close the contacts. The enclosure is a frame housing the contacts and the electromagnet. Csa bf09bf95 and b115b400 contactors are also csa certified, for canada only file 54332. 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. In addition, bf12, bf25, bf38 and bf65 type are csa certified as elevator equipment file 54332, class 2411. It was probably the first ever contactor that was used to. Electrical contractors provide services that keep our lives running smoothly. The contactor relay contacts themselves constitute a considerable safety feature. Each type of contact has an individual role to play.

There are different types of contacts in a contactor namely, contact springs, auxiliary contacts, and power contacts. In semiconductor testing, contactor can also refer to the specialized socket that connects the. There are various types of contactors, and each type has its own set of features, capabilities, and applications. 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. 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. In this article, i am going to talk about different types of contactors and their applications. Suitable surge supressor types lszd0005, lszd0006 and lsz00001 to lsz00003. Several types of contractors qualify as electricians. Two typical manual contactors still in use today engineers eventually made a breakthrough with the magnetic contactor.