High Voltage AC

Earthing Disconnectors 7.2kV to 40.5kV

Earthing Disconnectors ETM Range 3.6kV

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 ETM High Power Switches are rigorously engineered to meet your technical specifications. Operation : They can be operated manually or with an adapted motor (see list) up to 3.000 cycles. Phase to Phase distance, Signaling, Terminal Box or Locking system can be studied and customized. Maximum frequency up to 175Hz 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% List 2 following IEC 62271-102



  • No Load Operation
  • Quick-on mechanism (spring)
  • Closing with short circuit current
  • Indoor Type - Horizontal axis mounting (Vertical under study)
  • Configuration with 1, 2, 3 poles (more on request)
  • Mechanical endurance : 3.000 cycles
  • Maximum temperature withstand at 130°C without damage to the switch
  • Electrical contact by contact blades with pressed-on Hard Silver Contact Rivets and silver-plated
  • Supporting insulators made of cast epoxy resin (fire classification according to UL94-V1)
  • Large isolation air and creepage path
  • Self-cleaning blade contacts
  • True opening and visible distance
  • Rugged anti-torsion construction
  • Full customisation with :
  • Manual, motor
  • Auxiliary switches, blocking magnets, locking devices
  • Dimensions Fitting


  • Size per Standard ETM 8.000A to 12000A (higher rating on request)
  • Speed / Characteristic Around 1 sec with pneumatic operation 3 to 4 seconds with motor operation (depend on the rating)
  • Number of Poles 1
    3 or more under study
  • Standards According to IEC 62271-102
  • Application Power Conversion, Power Generation, Power Transport (Oil&Gaz turbine, Hydro plants, braking, night pump storage, ...)
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Yes


  • ETM0E3P3,6kV


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