GB1469613A - Circuit arrangement constituting a hybrid thermalsimulator of an electrical operating means - Google Patents
Circuit arrangement constituting a hybrid thermalsimulator of an electrical operating meansInfo
- Publication number
- GB1469613A GB1469613A GB2518375A GB2518375A GB1469613A GB 1469613 A GB1469613 A GB 1469613A GB 2518375 A GB2518375 A GB 2518375A GB 2518375 A GB2518375 A GB 2518375A GB 1469613 A GB1469613 A GB 1469613A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- temperature
- motor
- thermalsimulator
- hybrid
- 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
- H02H6/00—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images
Landscapes
- Control Of Voltage And Current In General (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
1469613 Measuring temperatures electrically SPRECHER & SCHUH AG 12 June 1975 [9 July 1974] 25183/75 Heading G1N The temperature of an electrical apparatus carrying a current IM is determined by feeding a current i proportional to 1<SP>2</SP> M to an RC network forming a thermal image for the copper losses of the apparatus, and supplementing this temperature signal with one devised by direct measurement of the temperature rise in the iron parts of the apparatus. As shown, the current I M taken by a motor M is measured by transformer 12 and rectified and squared to form the current i which is fed to an R 1 , C 1 combination whose time constant is equal to that of the copper loss temperature rise in motor M. The temperature of the iron parts is measured by a resistor 3 in a bridge network 4, whose output voltage is amplified at 9 and added via resistor R 1 to that across capacitor C 1 . The resultant voltage across C 1 is compared at 18 with a limiting value, to operate a cut-out for the motor supply when this limiting value is reached.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH943474A CH571784A5 (en) | 1974-07-09 | 1974-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1469613A true GB1469613A (en) | 1977-04-06 |
Family
ID=4351944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2518375A Expired GB1469613A (en) | 1974-07-09 | 1975-06-12 | Circuit arrangement constituting a hybrid thermalsimulator of an electrical operating means |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS519242A (en) |
| AT (1) | AT338365B (en) |
| CH (1) | CH571784A5 (en) |
| DE (1) | DE2510988A1 (en) |
| GB (1) | GB1469613A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5341758A (en) * | 1976-09-29 | 1978-04-15 | Hitachi Ltd | Thermistor having positive characteristics that can be connected in a continuous manner |
| CA1193317A (en) * | 1982-05-07 | 1985-09-10 | Canadian General Electric Company Limited | Thermal model for electrical apparatus |
| JPS63204307A (en) * | 1987-02-19 | 1988-08-24 | Fanuc Ltd | Overcurrent detector |
| DE4424811C2 (en) * | 1994-07-14 | 2003-05-28 | Bosch Gmbh Robert | Method for forming a simulated signal relating to a temperature in the exhaust system of an internal combustion engine |
-
1974
- 1974-07-09 CH CH943474A patent/CH571784A5/xx not_active IP Right Cessation
-
1975
- 1975-03-13 DE DE19752510988 patent/DE2510988A1/en not_active Withdrawn
- 1975-05-19 JP JP50059522A patent/JPS519242A/en active Pending
- 1975-05-22 AT AT391275A patent/AT338365B/en not_active IP Right Cessation
- 1975-06-12 GB GB2518375A patent/GB1469613A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2510988A1 (en) | 1976-01-29 |
| AT338365B (en) | 1977-08-25 |
| ATA391275A (en) | 1976-12-15 |
| CH571784A5 (en) | 1976-01-15 |
| JPS519242A (en) | 1976-01-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |