The NDG3V-250~800 series switch-disconnectors are applicable to electric systems with a rated voltage up to DC 1500V and a rated current up to 800A. It can be used for infrequent close and open, it provides isolation and breaking off circuit. It is suitable for photovoltaic, energy storage industries. 

Electrical Specification:

  • Agreed thermal current Ith (A) : 400/800
  • Number of poles: 2, 3
  • Rated insulation voltage Ui (V): DC1500
  • 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): DC: 10
  • Rated short circuit making capacity Icm (kA peak value): 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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