Motor Control Solutions

电机驱动及控制系统解决方案

Table of Contents

Introduction........................................4 Overview of U.S. Standards and Regulations.........................................4 Certification Process .............................................................54 Acceptance of Electrical Equipment in the U.S. ..........................................4 Structure of a Motor Starter in Accordance with UL508A...........5 Feeder Circuits and Branch Circuits .......................5 Group Motor Installations ....................................6 Required Functions of Combination Starters ..............................................7 Combination Starter Construction Types................................................8 Disconnecting Means on a Feeder or Branch Circuit ................................11 Motor Starter Line Diagrams.............................11 Disconnecting Means..............................11 Industrial Machinery requirements (NFPA79 Section 5.3.3.1 and UL508A Section 65, 66) ............................12 SCCR requirement in UL508A...........................13 Ratings: Tested Combination vs. Component................13 UL508A Support Websites..............................14 Combination Starter Components......................15 UL98 Manual Disconnect Switches....................15 TeSys™ GS Disconnect Switches ...........................15 Class 9422 Disconnect Switches ............................16 UL248 Fuses................................................16 TeSys DF Fuse Holder.........................................................................16 Type FB Fuse Holder...........................................................................16 UL489 Molded-Case Circuit Breakers........................................................17 PowerPact Circuit Breakers and Motor Circuit Protectors....................17 UL508 Contactors......................................................................................18 TeSys K, D and F Contactors...............................................................18 Type S Contactors................................................................................23 Definite Purpose Contactors................................................................24 UL508 Overload Relays.............................................................................26 TeSys K, D and F Overload Relays .....................................................26 TeSys T Motor Management System...................................................28 UL508 Starters...........................................................................................29 Type S Starters....................................................................................29 Definite Purpose Starters.....................................................................29 UL508 Self-Protected Combination Motor Controller.................................30 TeSys U................................................................................................30 UL508 Manual Self-Protected Combination Motor Controller....................30 TeSys GV.............................................................................................30 Combination Starter Solutions...............................................................31 UL508 Type A............................................................................................31 UL508 Type B............................................................................................31 UL508 Type C............................................................................................31 UL508 Type D............................................................................................32 UL508 Type E............................................................................................33 UL508 Type F............................................................................................33