FR839744A - Improvements to devices for protecting personnel against a dangerous increase in the voltage of the casing of an electrical device in relation to the earth - Google Patents
Improvements to devices for protecting personnel against a dangerous increase in the voltage of the casing of an electrical device in relation to the earthInfo
- Publication number
- FR839744A FR839744A FR839744DA FR839744A FR 839744 A FR839744 A FR 839744A FR 839744D A FR839744D A FR 839744DA FR 839744 A FR839744 A FR 839744A
- Authority
- FR
- France
- Prior art keywords
- earth
- casing
- relation
- voltage
- devices
- 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
- 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
- H02H3/14—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 occurrence of voltage on parts normally at earth potential
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR839744T | 1937-12-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR839744A true FR839744A (en) | 1939-04-11 |
Family
ID=9299679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR839744D Expired FR839744A (en) | 1937-12-15 | 1937-12-15 | Improvements to devices for protecting personnel against a dangerous increase in the voltage of the casing of an electrical device in relation to the earth |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR839744A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3340433A (en) * | 1965-02-15 | 1967-09-05 | Harry G Almquist | Safety cut-off for electrical power operated hand tools |
FR2504322A1 (en) * | 1981-04-15 | 1982-10-22 | Ferraz & Cie Lucien | SECURITY SYSTEM AGAINST TENSIONING OF METAL STRUCTURES |
-
1937
- 1937-12-15 FR FR839744D patent/FR839744A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3340433A (en) * | 1965-02-15 | 1967-09-05 | Harry G Almquist | Safety cut-off for electrical power operated hand tools |
FR2504322A1 (en) * | 1981-04-15 | 1982-10-22 | Ferraz & Cie Lucien | SECURITY SYSTEM AGAINST TENSIONING OF METAL STRUCTURES |
EP0064016A1 (en) * | 1981-04-15 | 1982-11-03 | FERRAZ Société Anonyme | Protection system against voltage occurrence on metallic structures |
US4451866A (en) * | 1981-04-15 | 1984-05-29 | Cinquin Jean Pierre | Metal structure grounding safety system |
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