ZA753695B - Multi-phase voltage sensing switching device - Google Patents
Multi-phase voltage sensing switching deviceInfo
- Publication number
- ZA753695B ZA753695B ZA00753695A ZA753695A ZA753695B ZA 753695 B ZA753695 B ZA 753695B ZA 00753695 A ZA00753695 A ZA 00753695A ZA 753695 A ZA753695 A ZA 753695A ZA 753695 B ZA753695 B ZA 753695B
- Authority
- ZA
- South Africa
- Prior art keywords
- switching device
- phase voltage
- voltage sensing
- sensing switching
- phase
- Prior art date
Links
Classifications
-
- 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
- H02H7/22—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 distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—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 distribution gear, e.g. bus-bar systems; for switching devices for switches
- H02H7/224—Anti-pump circuits
-
- 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
- H02H3/24—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 undervoltage or no-voltage
- H02H3/253—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 undervoltage or no-voltage for multiphase applications, e.g. phase interruption
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/482,191 US3940664A (en) | 1974-06-24 | 1974-06-24 | Multi-phase voltage sensing switching device |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA753695B true ZA753695B (en) | 1976-05-26 |
Family
ID=23915081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA00753695A ZA753695B (en) | 1974-06-24 | 1975-06-09 | Multi-phase voltage sensing switching device |
Country Status (7)
Country | Link |
---|---|
US (1) | US3940664A (de) |
CA (1) | CA1024610A (de) |
DE (1) | DE2528135A1 (de) |
ES (1) | ES438840A1 (de) |
FR (1) | FR2276717A1 (de) |
GB (1) | GB1516674A (de) |
ZA (1) | ZA753695B (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4331996A (en) * | 1979-08-22 | 1982-05-25 | Westinghouse Electric Corp. | Time delayed undervoltage relay |
GB2139436B (en) * | 1983-03-17 | 1986-10-08 | Janan Emmanuel Allos | Mains protection device |
US4675537A (en) * | 1985-04-01 | 1987-06-23 | Voltec Corporation | Current-controlled on/off power line switching of electrical devices |
US4797570A (en) * | 1987-07-31 | 1989-01-10 | Westinghouse Electric Corp. | Automatic paralleling of AC power sources |
US5097379A (en) * | 1988-05-17 | 1992-03-17 | Walton John F | Automatic or manual circuit restoration apparatus after a prescribed time delay |
FI86053C (fi) * | 1989-10-31 | 1992-07-10 | Kone Oy | Foerfarande och anordning foer styrning av en lyftmotor. |
DE19919331A1 (de) * | 1999-04-28 | 2000-11-02 | Ellenberger & Poensgen | Unterspannungsauslöser |
DE10128328A1 (de) * | 2001-06-12 | 2002-12-19 | Kopp Heinrich Ag | Unterspannungsauslöseschaltung |
TWI220079B (en) * | 2003-07-29 | 2004-08-01 | Macronix Int Co Ltd | Adjustable frequency AC drive control circuit |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2942123A (en) * | 1956-01-31 | 1960-06-21 | Westinghouse Electric Corp | Time delay control device |
US2959717A (en) * | 1958-09-25 | 1960-11-08 | Controllix Corp | Voltage responsive relay |
US3243658A (en) * | 1965-07-21 | 1966-03-29 | Hobart Brothers Co | Electronic voltage detection and protection device |
US3749944A (en) * | 1971-08-19 | 1973-07-31 | Westinghouse Electric Corp | Undervoltage sensing circuit |
US3843908A (en) * | 1973-12-03 | 1974-10-22 | Coilcraft Inc | Voltage failure sensing circuit |
-
1974
- 1974-06-24 US US05/482,191 patent/US3940664A/en not_active Expired - Lifetime
-
1975
- 1975-06-09 ZA ZA00753695A patent/ZA753695B/xx unknown
- 1975-06-09 GB GB24606/75A patent/GB1516674A/en not_active Expired
- 1975-06-13 CA CA229,334A patent/CA1024610A/en not_active Expired
- 1975-06-24 DE DE19752528135 patent/DE2528135A1/de active Pending
- 1975-06-24 FR FR7519754A patent/FR2276717A1/fr not_active Withdrawn
- 1975-06-24 ES ES438840A patent/ES438840A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2528135A1 (de) | 1976-01-15 |
ES438840A1 (es) | 1977-01-01 |
US3940664A (en) | 1976-02-24 |
FR2276717A1 (fr) | 1976-01-23 |
GB1516674A (en) | 1978-07-05 |
CA1024610A (en) | 1978-01-17 |
AU8224375A (en) | 1976-12-23 |
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