JPS57101915A - Overload preventive device - Google Patents
Overload preventive deviceInfo
- Publication number
- JPS57101915A JPS57101915A JP17945480A JP17945480A JPS57101915A JP S57101915 A JPS57101915 A JP S57101915A JP 17945480 A JP17945480 A JP 17945480A JP 17945480 A JP17945480 A JP 17945480A JP S57101915 A JPS57101915 A JP S57101915A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- relay
- load
- thyristor
- turned
- 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.)
- Pending
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
- H02H3/02—Details
- H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
- H02H3/023—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order by short-circuiting
Landscapes
- Control Of Voltage And Current In General (AREA)
Abstract
PURPOSE:To protect a load exactly, by turning on a thyristor and stopping supplying a current to a load circuit, in case when an overcurrent has flowed to the load circuit due to a short, etc. CONSTITUTION:Each one terminal of a DC power source 31, a surge absorbing diode 32 and a relay 33 is grounded, and the other terminal of the power source 31 is connected to a load circuit 44 through switches 42, 43. For instance, when the diode 32 or the relay 33 is turned on, voltage is applied to the relay 33, and a current is supplied to the circuit 44. In this case, if an overcurrent flows due to a load short, etc., gate-cathode voltage of a thyristor 35 becomes high gradually, and the thyristor 35 is turned on. As a result, the relay 33 is turned off, supply of a current to the circuit 44 is stopped, and the circuit 44 is prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17945480A JPS57101915A (en) | 1980-12-17 | 1980-12-17 | Overload preventive device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17945480A JPS57101915A (en) | 1980-12-17 | 1980-12-17 | Overload preventive device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57101915A true JPS57101915A (en) | 1982-06-24 |
Family
ID=16066134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17945480A Pending JPS57101915A (en) | 1980-12-17 | 1980-12-17 | Overload preventive device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57101915A (en) |
-
1980
- 1980-12-17 JP JP17945480A patent/JPS57101915A/en active Pending
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