Contactor basics pdf

101 BASICS SERIES LEARNING MODULE 19: STARTERS AND CONTACTORS. Cutler-Hammer STARTERS. WELCOME Welcome to Module 19, which is about starters, devices that control the use of electrical power to equipment, usually a motor.. As the name implies, starters start motors. very basic but important info..thanx alot. but like pegy&atul,give illustrations using detailed diagrams on how you can control a circuit. i specifically would like to know how it functions with contactors on a switch board panel to trip the cct breakers Application areas and power ratings are the two main factors that differentiate relays from contactors though both styles of devices may use the same basic PDF format. Relays and contactors 18 FUNDAMENTAL RELAY-OPERATING PRINCIPLES AND CHARACTERISTICS Time delay is obtained in induction-type relays by a "drag magnet," which is a permanent magnet arranged so that the relay rotor cuts the flux between the poles of the magnet, as In semiconductor testing, contactor can also refer to the specialized socket that connects the device under test. In process industries, a contactor is a vessel where two streams interact, for example, air and liquid. See Gas-liquid contactor.. A contactor is an electrically-controlled switch used for switching an electrical power circuit. • Closing the Start button contact energizes the contactor coil. An auxiliary contact on the contactor is wired to seal in the coil circuit. The contactor de-energizes if the control circuit is interrupted, the Stop button is operated, or if power is lost. • The overload contacts are arranged so an overload trip on any phase will cause the DC_DRIVE_BASICS_01R0201 DC drives fundamentals, Part 1 E-Learning, DC drives Welcome to the DC Drive Basics training module for the ABB DC drives. If you need help navigating this module, please click the Help button in the top right-hand corner. To view the presenter notes as text, please click the Notes button in the bottom right corner. Read a basic line diagram • Describe the construction and operating principles . of manual starters, electromagnetic contactors, and electromagnetic motor starters • Explain the need for motor overload protection • Briefly describe the operation of thermal and electronic . overload relays • Describe the advantages of reduced-voltage cdn.automationdirect.com 101 Basic Series Learning Module 19: Starters and Contactors. Starters and Contactors Page 2 What You Will Learn We'll start by talking about the building blocks of a starter: the contactor and over- • Contactors control the electric current to the motor. Their function is to repeat- 4 Mike Holt's Illustrated Guide to Understanding Basic Motor Controls Unit 1 Basic Principles of Motor Controls device will operate to open the circuit because of the increased heat caused by the current running through it. A magnetic starter or other motor controllers may include overload devices, or they may be an integral part This video explains the principle of operation of contactors. ??? ???? ????? Contactors are electrically controlled switching devices used for switching of e This video explains the principle of operation of contactors. ??? ???? ????? Contactors are electrically controlled switching devices used for switching of e 1.0 Relays and Contactors Thus, the terms "electro" and "mechanical." A basic component of an electromechanical relay is an electrical coil that consists of numerous windings and which, when energized, produces a magnetic field in a ferromagn