FR2030487A5 - - Google Patents
Info
- Publication number
- FR2030487A5 FR2030487A5 FR6901979A FR6901979A FR2030487A5 FR 2030487 A5 FR2030487 A5 FR 2030487A5 FR 6901979 A FR6901979 A FR 6901979A FR 6901979 A FR6901979 A FR 6901979A FR 2030487 A5 FR2030487 A5 FR 2030487A5
- Authority
- FR
- France
- 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.)
- Expired
Links
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/38—Instruments transformers for polyphase ac
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- 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
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
- H01H2083/146—Provisions for avoiding disadvantages of having asymetrical primaries, e.g. induction of a magnetic field even by zero difference current
-
- 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
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
- H01H2083/148—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer with primary windings formed of rigid copper conductors
-
- 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
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6901979A FR2030487A5 (en) | 1969-01-30 | 1969-01-30 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6901979A FR2030487A5 (en) | 1969-01-30 | 1969-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2030487A5 true FR2030487A5 (en) | 1970-11-13 |
Family
ID=9028405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR6901979A Expired FR2030487A5 (en) | 1969-01-30 | 1969-01-30 |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2030487A5 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2282714A1 (en) * | 1974-08-21 | 1976-03-19 | Condor Werk Frede Kg Geb | Faulty-current protection switch - has discontinued primary winding sections to reduce dimensions |
EP0615269A1 (en) * | 1993-03-09 | 1994-09-14 | Hager Electro S.A. | Device for detecting current unbalance, in particular for differential circuit breaker |
FR2738952A1 (en) * | 1995-09-19 | 1997-03-21 | Hitachi Ltd | Phase null current transformer trip unit for earth leakage protection |
DE102008051561A1 (en) * | 2008-10-14 | 2010-05-06 | Vacuumschmelze Gmbh & Co. Kg | Method for producing a current detection device |
DE102010004223B4 (en) * | 2010-01-08 | 2013-12-05 | Vacuumschmelze Gmbh & Co. Kg | Method for producing a current detection device |
-
1969
- 1969-01-30 FR FR6901979A patent/FR2030487A5/fr not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2282714A1 (en) * | 1974-08-21 | 1976-03-19 | Condor Werk Frede Kg Geb | Faulty-current protection switch - has discontinued primary winding sections to reduce dimensions |
EP0615269A1 (en) * | 1993-03-09 | 1994-09-14 | Hager Electro S.A. | Device for detecting current unbalance, in particular for differential circuit breaker |
FR2702605A1 (en) * | 1993-03-09 | 1994-09-16 | Hager Electro | Current imbalance detection device, in particular for differential switch. |
FR2738952A1 (en) * | 1995-09-19 | 1997-03-21 | Hitachi Ltd | Phase null current transformer trip unit for earth leakage protection |
DE102008051561A1 (en) * | 2008-10-14 | 2010-05-06 | Vacuumschmelze Gmbh & Co. Kg | Method for producing a current detection device |
DE102008051561B4 (en) * | 2008-10-14 | 2013-06-20 | Vacuumschmelze Gmbh & Co. Kg | Method for producing a current detection device |
DE102010004223B4 (en) * | 2010-01-08 | 2013-12-05 | Vacuumschmelze Gmbh & Co. Kg | Method for producing a current detection device |
US8813355B2 (en) | 2010-01-08 | 2014-08-26 | Vacuumschmelze Gmbh & Co. Kg | Method for producing a current metering device |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |