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Lovato Electric comprehensive line of contactors can be divided in to three basic configurations as illustrated above. Each of these have unique features OUR PRODUCT LINES INCLUDE ALL KINDS OF CONTACTORS FROM 2.2 KW UP TO 335 KW. THEY CAN BE AC and DC motor contactors . (mounting on a basic contactor). Contactor. MC-500a, 630a, 800a. Rated current: 500, 630, 800A. Rated insulation voltage: 690V. TypeⅡ: 150kA @415V Max. Overload relay MT-800. Basic type. SC: Magnetic contactor. SW: Magnetic motor starter *1. Frame size. 03 to N16. Auxiliary contact. Blank: Bifurcated contact (03 to N12).2.1 Basic function. Contactors are electromagnetically operated switches. The functional principle can be described as follows: when control. Helping the Customer (NEMA or IEC?, checking the motor nameplate etc.) Title: Basics Of Motor Starters And Contactors by EATON. Format: PDF. A contactor is an electrically controlled switch used for switching a power circuit, similar to a relay except with higher current. ratings. A contactor is an electrical device which is used for switching an electrical circuit on or off. It is considered to be a special type of relay. However, the