3DN2 Double side break disconnectors

Double side break disconnectors are primarily used in substations with limited phase space and where a vertical opening of the current path is not possible. The current path makes a horizontal rotating movement.


Main features and advantages:

  • Has three supporting insulators
  • The center insulator can rotate and carries the current path
  • Outer supporting insulators carry the fixed contacts
  • Two open separation sections
  • Compact and stable design allows for high mechanical tensile loads
  • Combination with surge arresters possible
  • Available with self-interlocking mechanism and in various colors
  • Sophisticated contact system ensures long service life and requires no maintenance effort
  • Extended RIV limits for each voltage level reduce magnetic interference for increased efficiency and reliability
  • Tested according to national and international standards, such as IEC, ANSI, GOST R and GB