3337771

Information

• Patent Grant
• 3337771

• References
• Source

• Patent Number

  3,337,771

• Date Filed

  Not available

• Date Issued

  Tuesday, August 22, 1967
  56 years ago

• CPC

  • H02H3/167 - combined with other earth-fault protective arrangements
  • H01H47/14 - for differential operation of the relay
  • H02H3/33 - using summation current transformers

• US Classifications

  • 361 - Electricity: electrical systems and devices