ZA712479B - An improvement in or relating to circuit breaker including improved ground fault protective device - Google Patents
An improvement in or relating to circuit breaker including improved ground fault protective deviceInfo
- Publication number
- ZA712479B ZA712479B ZA712479A ZA712479A ZA712479B ZA 712479 B ZA712479 B ZA 712479B ZA 712479 A ZA712479 A ZA 712479A ZA 712479 A ZA712479 A ZA 712479A ZA 712479 B ZA712479 B ZA 712479B
- Authority
- ZA
- South Africa
- Prior art keywords
- relating
- improvement
- circuit breaker
- protective device
- ground fault
- Prior art date
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
- H02H3/08—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
- H02H3/093—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 with timing means
-
- 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
- H02H3/34—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 of a three-phase system
- H02H3/347—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 of a three-phase system using summation current transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3551670A | 1970-05-07 | 1970-05-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA712479B true ZA712479B (en) | 1972-01-26 |
Family
ID=21883185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA712479A ZA712479B (en) | 1970-05-07 | 1971-04-19 | An improvement in or relating to circuit breaker including improved ground fault protective device |
Country Status (5)
Country | Link |
---|---|
US (1) | US3660722A (it) |
JP (1) | JPS5228980B1 (it) |
BR (1) | BR7102729D0 (it) |
DE (1) | DE2123514A1 (it) |
ZA (1) | ZA712479B (it) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4895532A (it) * | 1972-03-21 | 1973-12-07 | ||
US3835362A (en) * | 1973-08-09 | 1974-09-10 | Safe Flight Instrument | Defective battery condition/charging system warning device |
US3859565A (en) * | 1973-08-20 | 1975-01-07 | Firetrol Inc | Fire pump control apparatus |
JPS5069631U (it) * | 1973-10-30 | 1975-06-20 | ||
JPS52149950U (it) * | 1976-05-11 | 1977-11-14 | ||
US4149210A (en) * | 1977-09-09 | 1979-04-10 | Westinghouse Electric Corp. | Electrical apparatus including interlocking circuit for short-time delay and long-time delay tripping |
JPH0123605Y2 (it) * | 1981-05-20 | 1989-07-19 | ||
US4712151A (en) * | 1985-04-05 | 1987-12-08 | Square D Company | System for detection of ground faults in circuit breakers |
US4704546A (en) * | 1986-07-31 | 1987-11-03 | Westinghouse Electric Corp. | Auctioneering circuit |
FR2649259B1 (fr) * | 1989-07-03 | 1991-09-13 | Merlin Gerin | Declencheur statique comportant un systeme de desensibilisation de la protection terre |
JPH0742899U (ja) * | 1993-12-30 | 1995-08-11 | 重春 中尾 | 簡易焼却炉 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3440491A (en) * | 1962-06-05 | 1969-04-22 | Westinghouse Electric Corp | Circuit-controlling systems |
CA855386A (en) * | 1968-10-07 | 1970-11-03 | Westinghouse Electric Corporation | Overcurrent protective device |
-
1970
- 1970-05-07 US US35516A patent/US3660722A/en not_active Expired - Lifetime
-
1971
- 1971-04-19 ZA ZA712479A patent/ZA712479B/xx unknown
- 1971-05-06 BR BR2729/71A patent/BR7102729D0/pt unknown
- 1971-05-07 JP JP46029941A patent/JPS5228980B1/ja active Pending
- 1971-05-07 DE DE19712123514 patent/DE2123514A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS466177A (it) | 1971-12-07 |
DE2123514A1 (de) | 1971-11-25 |
JPS5228980B1 (it) | 1977-07-29 |
US3660722A (en) | 1972-05-02 |
BR7102729D0 (pt) | 1973-04-17 |
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