Types of contactors pdf

It was probably the first ever contactor that was used to. The largescale revamp calls for the coordinated skills of all three types of electrical contractors. General information technical data nema eemac ratings pdf. 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. Definitepurpose contactors can also be found in other types of heating, cooling, and refrigeration applications.

Suitable surge supressor types lszd0005, lszd0006 and lsz00001 to lsz00003. The current passing through the contactor excites the electromagnet. 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. Variations of manual contactors are still in use today. All dil contactor relays have doublebreak contacts. Pages contactors 245012 to 245025 reversing contactors 245032 to 245103 1 with low consumption kit la4 dbl see page 245117. The electromagnet or coil provides the driving force to close the contacts. Two typical manual contactors still in use today engineers eventually made a breakthrough with the magnetic contactor.

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. Contactors are most commonly used for controlling electric motors. In semiconductor testing, contactor can also refer to the specialized socket that connects the. In this article, i am going to talk about different types of contactors and their applications. After knowing about the working principle of the contactor, you may wonder hearing that contactors are also available in different types. Contactors are type of device which is used for establishing and interrupting current under some controlled or normal conditions. The contactor relay contacts themselves constitute a.

W lsd contactors for switching motors ac3 3pole, size 0 w schrackinfo auxiliary contact and contact block types lsz0d. 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 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. Csa bf09bf95 and b115b400 contactors are also csa certified, for canada only file 54332. There are various types of contactors, and each type has its own set of features, capabilities. Selection guide tesys contactors tesys d contactors. This includes power contacts, auxiliary contacts, and contact springs.

There are different types of contacts in a contactor namely, contact springs, auxiliary contacts, and power contacts. The enclosure is a frame housing the contacts and the electromagnet. Several types of contractors qualify as electricians. The contacts of the contactors are known for their rapid open and close action. Types of contactors and their applications engineers hub. Introduction global leader in industrial control devices. 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. Each type of contact has an individual role to play. Selection guide tesys contactors tesys d low consumption contactors. The contacts are the currentcarrying part of the contactor. When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name. 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. There are various types of contactors, and each type has its own set of features, capabilities, and applications.

Enclosures are made of insulating materials such as bakelite, nylon 6, and. Exceptional duty cycles or specialized motor types may require a different nema starter size than the nominal rating. Electrical contractors provide services that keep our lives running smoothly. In addition, bf12, bf25, bf38 and bf65 type are csa certified as elevator equipment file 54332, class 2411. Knife blade switch the knife blade switch was used earlier in the late 1800s. Contactors, overloads and manual motor starters carlo gavazzi. Contactors electromechanical relays electronics textbook.

A magnetic contactor is operated electromechanically without manual intervention. The contactor relay contacts themselves constitute a considerable safety feature. Working of a contactor different types of contactor devices 1. For b500, b630 and b630 types, ul listing is pending completion at time of catalogue printing. 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. If you still do not know about the basics of contactors, no worries, you can find information in this article contactors. Iecrated contactors usually handle hvac applications elsewhere. There are different types of contactors like, contactor springs, auxiliary contactor power contactor and capacitor duty contactor.