GB367539A - Means for protecting electrical installations, particularly heavy current installations - Google Patents
Means for protecting electrical installations, particularly heavy current installationsInfo
- Publication number
- GB367539A GB367539A GB3109/31A GB310931A GB367539A GB 367539 A GB367539 A GB 367539A GB 3109/31 A GB3109/31 A GB 3109/31A GB 310931 A GB310931 A GB 310931A GB 367539 A GB367539 A GB 367539A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- plant
- installations
- protected
- heavy current
- 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
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/003—Fault detection by injection of an auxiliary voltage
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
367,539. Protective cut-out arrangements. SIEMENS-SCHUCKERTWERKE AKT.-GES., Siemensstadt, Berlin. Jan. 30, 1931, No. 3109. Convention date, Feb. 10, 1930. Addition to 319,242, [Class 38 (v), Electric switches &c.]. [Class 38 (v).] Relates to the protection of heavy current installations by superimposing on them a frequency dependent on that of their natural frequency so that when the natural frequency changes on fault a change in the superimposed frequency takes place, and, acting on a relay isolates the faulty circuit or apparatus, as described in the parent Specification. According to the present invention, instead of employing filter circuits to separate the protected part from the remainder of the plant a high-frequency oscillation generator H impresses by inductive coupling equal tensions (with a phase displacement of 180‹ in relation to each other) on the one hand on the part of the plant to be protected W, and, on the other hand, upon a winding W2 in the connection between W1 and the remainder of the plant. The points A and C are thus points of equal potential in respect of the superimposed frequency and external faults do not affect the action of the relay R which responds only to a fault in the protected part W1.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE616660T | 1930-02-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB367539A true GB367539A (en) | 1932-02-25 |
Family
ID=34812894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3109/31A Expired GB367539A (en) | 1930-02-11 | 1931-01-30 | Means for protecting electrical installations, particularly heavy current installations |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE616660C (en) |
| FR (1) | FR39718E (en) |
| GB (1) | GB367539A (en) |
-
1930
- 1930-02-11 DE DE1930616660D patent/DE616660C/en not_active Expired
-
1931
- 1931-01-30 GB GB3109/31A patent/GB367539A/en not_active Expired
- 1931-02-05 FR FR39718D patent/FR39718E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE616660C (en) | 1935-08-02 |
| FR39718E (en) | 1932-02-17 |
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