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Additional Technical Information

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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