High Current DC


IP NOR Range 500VDC (3kA to 25kA)

For more than 100 years, Mersen has been providing the market with safe, reliable and longer life time off-load disconnectors.These devices offer high performances and robustness for heavy duty requierements with very limited maintenance. Mersen offers one of the largest product ranges on the market and is the global leader. Mersen has a switch solution that will meet your unique needs. Our standard IP NOR High Current Change-over Switch product line is rigorously engineered to meet your technical specifications. Operation : They can be operated manually, with a pneumatic piston or with an adapted motor (see list) up to 60.000 cycles. Signaling, Terminal Box or Locking system can be studied and customized. Acceptable ripple current at 2% Indoor in a currentless state Ambient air should not exceed +40°C (otherwise please consult) Altitude should not exceed 1000 m Relative humidity should not exceed 95%



  • No Load operation
  • Indoor Type - Mobile contact blade position preferably in vertical position. it is necessary to parallel the two connections for the double face apparatus, to equalize the current on both faces as muche as possible.
  • Configuration with 2 poles change-over (reversing)
  • Mechanical endurance 60.000 cycles (with respect to maintenance instructions)
  • Connexion plates in silvered Copper
  • Large customization possible with :
  • - connexion plate (length, fixing holes)
  • - Manual, motor or pneumatic drives
  • - auxilaries switches, blocking magnets, locking devices
  • - dimension fitting
  • Typical temperature rise at nominal current 15°K above busbar (with 40°Cmax.)
  • Temperature rise at nominal current is less than 70°K (with 40°C max. ambient temperature)
  • Visible break by direct seeing of the mobile silver-plated copper contacts
  • Mechanically independant mobile contact arms with high pressure stainless springs assuring correct contact pressure
  • Easy connections to Copper busbar by bolting and self-supporting (Busbar must be sized to withstand the disconnector additionnal weight)
  • Electrical contact with silver to silver contact which offer high short-circuit current withstand and Low and constant voltage drop
  • Large insulation and creepage distances
  • Ponctual temperature withstand without equipment damages 130°C
  • For Chrome plating operations, the operation time for prior degreasing, can be relatively briel and the electrical contacts envolved have a lower rating (ligther) (IP NOR CD)


  • Standards IEC 60947-3 and IEC 60077-1
  • Application Power conversion to change-over (reversing) for Surface treatement application
    (degreasing, Chrome & Copper electroplating)
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Yes


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