3591831

Information

• Patent Grant
• 3591831

• References
• Source

• Patent Number

  3,591,831

• Date Filed

  Not available

• Date Issued

  Tuesday, July 6, 1971
  53 years ago

• CPC

  • H02H3/36 - involving comparison of the voltage or current values at corresponding points of different systems
  • H02H7/00 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions

• US Classifications

  • 361 - Electricity: electrical systems and devices