BE501992A - - Google Patents
Info
- Publication number
- BE501992A BE501992A BE501992DA BE501992A BE 501992 A BE501992 A BE 501992A BE 501992D A BE501992D A BE 501992DA BE 501992 A BE501992 A BE 501992A
- Authority
- BE
- Belgium
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
- H02H3/26—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
- H02H3/353—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 involving comparison of phase voltages
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0038—Details of emergency protective circuit arrangements concerning the connection of the detecting means, e.g. for reducing their number
- H02H1/0046—Commutating the detecting means in dependance of the fault, e.g. for reducing their number
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/008—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for protective arrangements according to this subclass
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL152434 | 1950-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE501992A true BE501992A (it) |
Family
ID=19750489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE501992D BE501992A (it) | 1950-03-21 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2601473A (it) |
| BE (1) | BE501992A (it) |
| CH (1) | CH289178A (it) |
| DE (1) | DE858716C (it) |
| GB (1) | GB678140A (it) |
| NL (1) | NL81111C (it) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2914704A (en) * | 1955-10-31 | 1959-11-24 | Gilfillan Bros Inc | Abnormal voltage protection circuit |
| US2951188A (en) * | 1956-01-10 | 1960-08-30 | Ite Circuit Breaker Ltd | High speed contacting device |
| US3048746A (en) * | 1958-03-04 | 1962-08-07 | English Electric Co Ltd | Electrical protective relays using double rectified bridge comparators |
| US3001101A (en) * | 1958-03-04 | 1961-09-19 | English Electric Co Ltd | Electrical protective relays |
| US3108205A (en) * | 1958-05-02 | 1963-10-22 | Burroughs Corp | Voltage sensing control circuit |
| US3426274A (en) * | 1964-11-19 | 1969-02-04 | Western Reserve Electronics In | Diode bridge protection circuits for electrical measuring instruments employing the diode forward drop threshold voltage |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1798687A (en) * | 1925-09-03 | 1931-03-31 | Bbc Brown Boveri & Cie | Electric relay apparatus |
| US2462212A (en) * | 1944-11-06 | 1949-02-22 | Matthews W N Corp | Protective switch |
| US2520792A (en) * | 1948-11-17 | 1950-08-29 | Ite Circuit Breaker Ltd | Multirange overcurrent relay |
-
0
- NL NL81111D patent/NL81111C/xx active
- BE BE501992D patent/BE501992A/xx unknown
-
1951
- 1951-02-21 US US212144A patent/US2601473A/en not_active Expired - Lifetime
- 1951-03-16 GB GB6396/51A patent/GB678140A/en not_active Expired
- 1951-03-18 DE DEN3644A patent/DE858716C/de not_active Expired
- 1951-03-19 CH CH289178D patent/CH289178A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL81111C (it) | |
| DE858716C (de) | 1952-12-08 |
| CH289178A (de) | 1953-02-28 |
| GB678140A (en) | 1952-08-27 |
| US2601473A (en) | 1952-06-24 |