JPS4978855A - - Google Patents
Info
- Publication number
- JPS4978855A JPS4978855A JP48083254A JP8325473A JPS4978855A JP S4978855 A JPS4978855 A JP S4978855A JP 48083254 A JP48083254 A JP 48083254A JP 8325473 A JP8325473 A JP 8325473A JP S4978855 A JPS4978855 A JP S4978855A
- Authority
- JP
- Japan
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- H02H3/16—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 fault current to earth, frame or mass
- H02H3/17—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 fault current to earth, frame or mass by means of an auxiliary voltage injected into the installation to be protected
-
- 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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/331—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers responsive to earthing of the neutral conductor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00310184A US3800189A (en) | 1972-11-28 | 1972-11-28 | Apparatus for detecting a ground connection on load side of neutral conductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS4978855A true JPS4978855A (enExample) | 1974-07-30 |
Family
ID=23201349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48083254A Pending JPS4978855A (enExample) | 1972-11-28 | 1973-07-25 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3800189A (enExample) |
| JP (1) | JPS4978855A (enExample) |
| CA (1) | CA978639A (enExample) |
| DE (1) | DE2338785A1 (enExample) |
| FR (1) | FR2208222A1 (enExample) |
| GB (1) | GB1389529A (enExample) |
| IT (1) | IT994245B (enExample) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3879639A (en) * | 1973-01-04 | 1975-04-22 | Federal Pacific Electric Co | Ground fault interrupters |
| GB1472930A (en) * | 1973-05-25 | 1977-05-11 | Hochiki Co | Apparatus for discriminating an operated sensor of an alarm system |
| US4012668A (en) * | 1973-06-11 | 1977-03-15 | Rca Corporation | Ground fault and neutral fault detection circuit |
| US4053815A (en) * | 1973-09-10 | 1977-10-11 | Federal Pacific Electric Company | Ground fault interrupters |
| US4024436A (en) * | 1973-11-30 | 1977-05-17 | Syracuse Electronics Corporation Subsidiary Of Pass & Seymour, Inc. | Ground fault protective circuitry |
| US3936699A (en) * | 1973-11-30 | 1976-02-03 | Pass & Seymour, Inc. | Ground fault protective circuitry |
| US3857069A (en) * | 1973-12-20 | 1974-12-24 | Gen Electric | Ground fault circuit interrupter and module therefor |
| US3878435A (en) * | 1974-01-21 | 1975-04-15 | Cutler Hammer Inc | Dormant oscillator ground to neutral protection for ground fault interrupters |
| US3916261A (en) * | 1974-02-25 | 1975-10-28 | Square D Co | Ground fault protective system including improved impedance detecting means |
| US3935510A (en) * | 1974-02-25 | 1976-01-27 | Square D Company | Ground fault protective system including an impedance responsive oscillator |
| CA1104243A (en) * | 1974-06-17 | 1981-06-30 | Lynn B. Steve | Ground fault circuit interrupter module |
| US3953766A (en) * | 1974-09-16 | 1976-04-27 | General Electric Company | Ground fault circuit interrupter and electronic module therefor |
| US4114089A (en) * | 1975-03-21 | 1978-09-12 | Rca Corporation | Ground fault detecting apparatus including current-responsive threshold detection circuitry |
| US4057842A (en) * | 1976-01-28 | 1977-11-08 | Borg-Warner Corporation | Current regulation system for three-phase load |
| USRE30678E (en) * | 1976-03-26 | 1981-07-14 | Eaton Corp. | Dormant oscillator ground to neutral protection for ground fault interrupters |
| US4052751A (en) * | 1976-04-12 | 1977-10-04 | The Gillette Company | Ground fault interrupter circuit |
| US4422034A (en) * | 1980-01-22 | 1983-12-20 | Toyo Sushinki Kabushiki Kaisha | Method for measuring insulation resistance and device therefor |
| US4348709A (en) * | 1980-12-15 | 1982-09-07 | Mauk Ernest R | Electronic load protection circuit |
| GB2195846A (en) * | 1986-10-09 | 1988-04-13 | Lucas Ind Plc | Detecting disconnection of electrical apparatus |
| US5644464A (en) * | 1995-01-12 | 1997-07-01 | Pacific Sources, Inc. | Resettable latch mechanism |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3213321A (en) * | 1963-05-31 | 1965-10-19 | Charles F Dalziel | Miniature differential circuit breaker |
| US3381533A (en) * | 1966-06-16 | 1968-05-07 | Melpar Inc | Rapidly starting oscillator |
| US3475698A (en) * | 1968-03-28 | 1969-10-28 | Atomic Energy Commission | Transistor oscillator having interchangeable reactive networks |
| US3638072A (en) * | 1969-03-19 | 1972-01-25 | Matsushita Electric Works Ltd | Detecting device for abnormal state in electric circuit |
| US3611035A (en) * | 1970-06-08 | 1971-10-05 | Rucker Co | Ground fault protective system having grounded neutral protection |
| US3668469A (en) * | 1970-12-21 | 1972-06-06 | Safety Co The | Monitor for receptacle with two or three contacts |
| US3713003A (en) * | 1971-02-16 | 1973-01-23 | Purex Corp Ltd | Fault or leak detector |
-
1972
- 1972-11-28 US US00310184A patent/US3800189A/en not_active Expired - Lifetime
-
1973
- 1973-06-08 CA CA173,542A patent/CA978639A/en not_active Expired
- 1973-06-19 GB GB2902873A patent/GB1389529A/en not_active Expired
- 1973-07-13 FR FR7325795A patent/FR2208222A1/fr not_active Withdrawn
- 1973-07-25 JP JP48083254A patent/JPS4978855A/ja active Pending
- 1973-07-31 DE DE19732338785 patent/DE2338785A1/de active Pending
- 1973-09-13 IT IT52494/73A patent/IT994245B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| DE2338785A1 (de) | 1974-05-30 |
| CA978639A (en) | 1975-11-25 |
| FR2208222A1 (enExample) | 1974-06-21 |
| IT994245B (it) | 1975-10-20 |
| GB1389529A (en) | 1975-04-03 |
| US3800189A (en) | 1974-03-26 |