FR976415A - AC systems protection device - Google Patents
AC systems protection deviceInfo
- Publication number
- FR976415A FR976415A FR976415DA FR976415A FR 976415 A FR976415 A FR 976415A FR 976415D A FR976415D A FR 976415DA FR 976415 A FR976415 A FR 976415A
- Authority
- FR
- France
- Prior art keywords
- protection device
- systems protection
- systems
- protection
- Prior art date
- 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
-
- 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
- H01H83/142—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 bimetal elements
-
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3376947A GB630834A (en) | 1947-12-22 | 1947-12-22 | Protective devices for three phase electric alternating current systems |
Publications (1)
Publication Number | Publication Date |
---|---|
FR976415A true FR976415A (en) | 1951-03-19 |
Family
ID=10357204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR976415D Expired FR976415A (en) | 1947-12-22 | 1948-12-10 | AC systems protection device |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE827823C (en) |
FR (1) | FR976415A (en) |
GB (1) | GB630834A (en) |
-
1947
- 1947-12-22 GB GB3376947A patent/GB630834A/en not_active Expired
-
1948
- 1948-12-10 FR FR976415D patent/FR976415A/en not_active Expired
-
1950
- 1950-08-26 DE DER3393A patent/DE827823C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB630834A (en) | 1949-10-21 |
DE827823C (en) | 1952-01-14 |
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