GB1076078A - Current transient detector - Google Patents
Current transient detectorInfo
- Publication number
- GB1076078A GB1076078A GB1749865A GB1749865A GB1076078A GB 1076078 A GB1076078 A GB 1076078A GB 1749865 A GB1749865 A GB 1749865A GB 1749865 A GB1749865 A GB 1749865A GB 1076078 A GB1076078 A GB 1076078A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- contacts
- transistors
- relay
- circuit
- 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
- H02H3/44—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 the rate of change of electrical quantities
- H02H3/445—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 the rate of change of electrical quantities of DC quantities
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
1,076,078. Transistor monostable circuits. HIRST ELECTRIC INDUSTRIES Ltd. Feb. 11, 1966 [April 26, 1965], No. 17498/65. Heading H3T. [Also in Division H2] A current transient detector comprises a monitoring means 11 responsive to a sudden change in the magnitude of an " external " current, e.g. in an electroplating or an electrolytic machining apparatus to apply an input signal to a monostable circuit which includes a relay 23 having contacts 23a in a feedback circuit 24 . . . 26. The means 11 may be coil which is placed in inductive relationship with a conductor of the protected apparatus and connected by a rectifier 12, a capacitor 13 and resistors 14, 15 to the monostable circuit which comprises normally non-conducting transistors 16, 22 of opposite conductivity types. Providing the pulse induced in the coil 11 by the sudden change in the current is of sufficient duration, both transistors are rendered conducting and the reed relay 23 closes its contacts 23a to render the feed-back circuit effective to apply a holding pulse which keeps the transistors conductive for a predetermined time even though the initial pulse has ended. The relay 23 also closes its contacts 23b, 23c to effect the interruption of the external current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1749865A GB1076078A (en) | 1965-04-26 | 1965-04-26 | Current transient detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1749865A GB1076078A (en) | 1965-04-26 | 1965-04-26 | Current transient detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1076078A true GB1076078A (en) | 1967-07-19 |
Family
ID=10096231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1749865A Expired GB1076078A (en) | 1965-04-26 | 1965-04-26 | Current transient detector |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1076078A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2177561A (en) * | 1985-07-04 | 1987-01-21 | Terence Frank Hart | Electrical arc fault detector |
| US8325455B2 (en) | 2007-04-05 | 2012-12-04 | Georgia Tech Research Corporation | Voltage surge and overvoltage protection with RC snubber current limiter |
| US8488285B2 (en) | 2005-10-24 | 2013-07-16 | Georgia Tech Research Corporation | Active current surge limiters with watchdog circuit |
| US8582262B2 (en) | 2005-01-31 | 2013-11-12 | Georgia Tech Research Corporation | Active current surge limiters with disturbance sensor and multistage current limiting |
| US9270170B2 (en) | 2011-04-18 | 2016-02-23 | Innovolt, Inc. | Voltage sag corrector using a variable duty cycle boost converter |
| US9299524B2 (en) | 2010-12-30 | 2016-03-29 | Innovolt, Inc. | Line cord with a ride-through functionality for momentary disturbances |
-
1965
- 1965-04-26 GB GB1749865A patent/GB1076078A/en not_active Expired
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2177561B (en) * | 1985-07-04 | 1989-05-10 | Terence Frank Hart | Electrical arc fault detector |
| GB2177561A (en) * | 1985-07-04 | 1987-01-21 | Terence Frank Hart | Electrical arc fault detector |
| US8582262B2 (en) | 2005-01-31 | 2013-11-12 | Georgia Tech Research Corporation | Active current surge limiters with disturbance sensor and multistage current limiting |
| US8766481B2 (en) | 2005-01-31 | 2014-07-01 | Georgia Tech Research Corporation | Reduction of inrush current due to voltage sags with switch and shunt resistance |
| US8643989B2 (en) | 2005-01-31 | 2014-02-04 | Georgia Tech Research Corporation | Active current surge limiters with inrush current anticipation |
| US8587913B2 (en) | 2005-01-31 | 2013-11-19 | Georgia Tech Research Corporation | Active current surge limiters with voltage detector and relay |
| US9048654B2 (en) | 2005-10-24 | 2015-06-02 | Georgia Tech Research Corporation | Reduction of inrush current due to voltage sags by impedance removal timing |
| US8488285B2 (en) | 2005-10-24 | 2013-07-16 | Georgia Tech Research Corporation | Active current surge limiters with watchdog circuit |
| US9065266B2 (en) | 2005-10-24 | 2015-06-23 | Georgia Tech Research Corporation | Reduction of inrush current due to voltage sags by an isolating current limiter |
| US8411403B2 (en) | 2007-04-05 | 2013-04-02 | Georgia Tech Research Corporation | Voltage surge and overvoltage protection with current surge protection |
| US8593776B2 (en) | 2007-04-05 | 2013-11-26 | Georgia Tech Research Corporation | Voltage surge and overvoltage protection using prestored voltage-time profiles |
| US8335068B2 (en) | 2007-04-05 | 2012-12-18 | Georgia Tech Research Corporation | Voltage surge and overvoltage protection using prestored voltage-time profiles |
| US8335067B2 (en) | 2007-04-05 | 2012-12-18 | Georgia Tech Research Corporation | Voltage surge and overvoltage protection with sequenced component switching |
| US8325455B2 (en) | 2007-04-05 | 2012-12-04 | Georgia Tech Research Corporation | Voltage surge and overvoltage protection with RC snubber current limiter |
| US9071048B2 (en) | 2007-04-05 | 2015-06-30 | Georgia Tech Research Corporation | Voltage surge and overvoltage protection by distributed clamping device dissipation |
| US9299524B2 (en) | 2010-12-30 | 2016-03-29 | Innovolt, Inc. | Line cord with a ride-through functionality for momentary disturbances |
| US9270170B2 (en) | 2011-04-18 | 2016-02-23 | Innovolt, Inc. | Voltage sag corrector using a variable duty cycle boost converter |
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