Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
  • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
  • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
  • H02H3/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions
  • H02H3/105—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions responsive to excess current and fault current to earth
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
  • G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
  • G01R11/02—Constructional details
  • G01R11/12—Arrangements of bearings
  • G01R11/14—Arrangements of bearings with magnetic relief
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
  • G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
  • G01R11/02—Constructional details
  • G01R11/24—Arrangements for avoiding or indicating fraudulent use
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
  • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
  • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
  • H01H83/226—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages with differential transformer

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Breakers (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=4529527

Family Applications (1)

Country Status (6)

Families Citing this family (2)

• 0
  • NL NL6913077.A patent/NL158684B/xx unknown
  • BE BE506088D patent/BE506088A/xx unknown
  • NL NL90296D patent/NL90296C/xx active
• 1950
  • 1950-12-04 CH CH285598D patent/CH285598A/de unknown
• 1951
  • 1951-09-18 DE DEL10125A patent/DE857828C/de not_active Expired
  • 1951-10-09 FR FR1043655D patent/FR1043655A/fr not_active Expired
  • 1951-11-29 GB GB28063/51A patent/GB694623A/en not_active Expired

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