Electrical Contacts, 2nd Edition

14

Medium to High Current Switching: Low Voltage Contactors and Circuit Breakers, and Vacuum Interrupters

Manfred Lindmayer

Every fault seeming monstrous till his fellow fault came to match it.

As You Like It, William Shakespeare

CONTENTS

14.1    General Aspects of Switching in Air

14.1.1    Arc Chutes

14.1.2    Magnetic Blast Field

14.1.3    Arc Dwell Time on the Contacts

14.1.4    Sticking and Back-Commutation of the Arc

14.2    Contacts for Switching in Air

14.3    Low-Voltage Contactors

14.3.1    Principle/Requirements

14.3.2    Mechanical Arrangement

14.3.3    Quenching Principle and Contact and Arc Chute Design

14.3.4    Contact Materials

14.3.5    Trends

14.3.5.1    Contactors versus Electronics

14.3.5.2    Vacuum Contactors

14.3.5.3    Hybrid ...