CH614569A5 - Switching device for protecting an electrical apparatus - Google Patents
Switching device for protecting an electrical apparatusInfo
- Publication number
- CH614569A5 CH614569A5 CH123177A CH123177A CH614569A5 CH 614569 A5 CH614569 A5 CH 614569A5 CH 123177 A CH123177 A CH 123177A CH 123177 A CH123177 A CH 123177A CH 614569 A5 CH614569 A5 CH 614569A5
- Authority
- CH
- Switzerland
- Prior art keywords
- protecting
- switching device
- electrical apparatus
- electrical
- switching
- 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
- H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
- H02H3/382—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 both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81776A AT360610B (de) | 1976-02-06 | 1976-02-06 | Elektrische schutzeinrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
CH614569A5 true CH614569A5 (en) | 1979-11-30 |
Family
ID=3500420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH123177A CH614569A5 (en) | 1976-02-06 | 1977-02-02 | Switching device for protecting an electrical apparatus |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT360610B (xx) |
CH (1) | CH614569A5 (xx) |
DE (1) | DE2704762A1 (xx) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2907857C2 (de) * | 1979-02-28 | 1985-01-10 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur Bestimmung der Reaktanz einer Energieübertragungsleitung im Kurzschlußfalle |
AT380592B (de) * | 1981-09-17 | 1986-06-10 | Elin Union Ag | Schutzrelais fuer elektrische maschinen |
US4589073A (en) * | 1982-05-05 | 1986-05-13 | Dorman Smith Switchgear Limited | Apparatus for determining prospective short circuit current |
US6744393B2 (en) * | 2001-12-21 | 2004-06-01 | Schneider Automation Inc. | Low cost multi-range input circuit for industrial analog input modules |
-
1976
- 1976-02-06 AT AT81776A patent/AT360610B/de not_active IP Right Cessation
-
1977
- 1977-02-02 CH CH123177A patent/CH614569A5/xx not_active IP Right Cessation
- 1977-02-04 DE DE19772704762 patent/DE2704762A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
AT360610B (de) | 1981-01-26 |
DE2704762A1 (de) | 1977-08-11 |
ATA81776A (de) | 1980-06-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PL | Patent ceased |