GB634003A - Improvements in control systems for electric motors driving baling presses - Google Patents
Improvements in control systems for electric motors driving baling pressesInfo
- Publication number
- GB634003A GB634003A GB640948A GB640948A GB634003A GB 634003 A GB634003 A GB 634003A GB 640948 A GB640948 A GB 640948A GB 640948 A GB640948 A GB 640948A GB 634003 A GB634003 A GB 634003A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- switch
- overload
- control
- short
- 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
- 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
- H02H7/08—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 dynamo-electric motors
- H02H7/085—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 dynamo-electric motors against excessive load
Landscapes
- Protection Of Generators And Motors (AREA)
- Motor And Converter Starters (AREA)
Abstract
634,003. Overload control of motors. PETRIE & McNAUGHT, Ltd., and DAWSON, H. March 1, 1948, No. 6409. [Class 38 (iii)] A sensitive overload control for an electrically driven baling press comprises an actuating coil which is short-circuited during the starting operation for a timed period in which the normal overload release is effective. Fig. 3 shows a contactor k adapted to short-circuit the coil r of a sensitive load responsive relay. This contactor is energized through an electromagnetic time-switch m<SP>1</SP> when a main switchfuse j is closed. On closing a starting switch n by means of a push-button p the coil m is also energized and after a time interval, during which a star-delta switch may be operated, the switch m<SP>1</SP> is opened so that the coil r becomes effective to open the circuit of the closing coil n if the material in the press should cause excess loading. The normal overload coils n<SP>1</SP> also control the coil n. According to the Provisional Specification the normal overload coil may be short-circuited when the sensitive control comes into operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB640948A GB634003A (en) | 1948-03-01 | 1948-03-01 | Improvements in control systems for electric motors driving baling presses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB640948A GB634003A (en) | 1948-03-01 | 1948-03-01 | Improvements in control systems for electric motors driving baling presses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB634003A true GB634003A (en) | 1950-03-15 |
Family
ID=9813988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB640948A Expired GB634003A (en) | 1948-03-01 | 1948-03-01 | Improvements in control systems for electric motors driving baling presses |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB634003A (en) |
-
1948
- 1948-03-01 GB GB640948A patent/GB634003A/en not_active Expired
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