The repeated insulation measurements for electrical systems required by DIN VDE 0100-600 are often laborious. AC-DC sensitive residual current circuit-breakers must be disconnected beforehand, as otherwise the insulation test will give a false reading.  
With the new ISΩ HD design from Doepke, there are now AC-DC sensitive residual current circuit-breakers that are test-proof.  Insulation can therefore be checked without prior disconnection. Type B Doepke residual current circuit-breakers in the  ISΩ HD design can handle up to 63 A rated current and  500 mA rated residual current.

  • saves a lot of time during insulation tests
  • no mechanical stress due to repeated disconnection
  • no false readings due to the internal electronics