Circuit Protection Technical Information

  • Circuit Breaker Features and Benefits
  • Circuit Breaker Technologies
  • Trip Free and Method of Operation
  • Terminals and Auxiliary Contacts
  • Interrupting Capacity
  • Ambient Temperature Influence
  • Additional Technical Documentation

    Additional Technical Documentation

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    This file includes the following topics:

    • Typical Time/Current Characteristic Curve
    • Principal Types of CBE:
      • Thermal Circuit Breakers (TO)
      • Thermal-Magnetic Circuit Breakers (TM)
      • Magnetic Circuit Breakers (MO or HM)
      • High Performance Circuit Breakers
      • Electronic Overcurrent Protection
    • Manual Trip / ON-OFF Switches
    • Snap-Action Mechanism
    • Trip Free Mechanism
    • Terminals
    • Auxiliary Contacts
    • Solderability of Silver-Plated Terminals
    • Current Ratings and Time/Current Characteristic Curves
    • Ambient Temperature Influence
    • Close Mounting of CBEs
    • Typical internal resistance values
    • ON Duty
    • Interrupting Capacity Icn
    • Inductive and Resistive Load
    • Switching Sequence
    • Degrees of Protection of Electrical Equipment According to IEC 60529 / DIN EN 60529
    • Preferred Degrees of Protection
    • Tolerances in Dimensional Drawings
    • Cable Ratings:
      • to DIN EN 60934
      • for road vehicles
      • for aerospace applications
    • Representation of Operating Status
    • Definition of Make Contact and Break Contact
    • Terminal Identification
    • Graphical Symbols
      • in accordance with DIN EN 60617/IEC 60617 and ANSI Y32.20/CSA Z99
    • Contact Resistance:
      • The physical causes of contact resistance
      • Influence of outside environmental conditions on contact resistance
      • Influence of internal environmental conditions on contact resistance
      • Typical applications for different contact materials
      • Measuring contact resistance