NDG3A series of disconnecting switches are applicable to electric systems with a rated voltage not higher than DC 1000V or AC 800V and a rated current not higher than 500A, 630A, 800A. They can be connected and disconnected at a low frequency to safely isolate various low-voltage circuits in the photovoltaic field.

Electrical Specification:

  • Agreed thermal current Ith (A) : 800
  • Number of poles: 3, 4
  • Rated insulation voltage Ui (V): 1000
  • Rated impulse withstand voltage Uimp (kV): 12
  • Rated Frequency: 50/60Hz
  • No protection device for the rated short time withstand current Icw (1s.kA effective value): AC: 16; DC: 10
  • Rated short circuit making capacity Icm (kA peak value):  AC: 32; DC: 17Ie
  • Mechanical life (times):5000
  • Electrical life (times): 100
  • Operating torque (N.m): 18
  • Installation mode: Screw mounting
  • Applicable standards: GB14048.1, GB14048.3, IEC60947-1, IEC60947-3
  • Product certification: CCC, CE, TUV

Working Environment:

  • Normal installation altitude shall not exceed 3000m, or otherwise negotiating with the manufacturer
  • Operating ambient temperature: -40℃~+75℃ , when the ambient air temperature is above +70℃, the user should negotiate with the manufacturer
  • Pollution Degree: Level 3
  • Operating/storage relative humidity: The relative humidity at an ambient temperature of +40 should not exceed 50%. A higher relative humidity is allowed at a lower humidity.
  • The product can be disposed in places that are free from explosive media, media corrosive to metal, insulation damaging gas, and conductive dust. The product should be avoided from snow and rain. 
  • Protection class: IP20 for the complete appliance, handle outside a cabinet: IP65..
  • Installation Category: III & IV
  • Storage environment: -50℃~+80℃


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