GB969915A - Improvements in or relating to electrical circuit-breakers - Google Patents
Improvements in or relating to electrical circuit-breakersInfo
- Publication number
- GB969915A GB969915A GB26010/61A GB2601061A GB969915A GB 969915 A GB969915 A GB 969915A GB 26010/61 A GB26010/61 A GB 26010/61A GB 2601061 A GB2601061 A GB 2601061A GB 969915 A GB969915 A GB 969915A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- circuit
- breaker
- output
- phase angle
- 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
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Theoretical Computer Science (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Keying Circuit Devices (AREA)
Abstract
969,915. Arcing preventing in switches. CENTRAL ELECTRICITY GENERATING BOARD, and W. E. J. FARVIS. July 17, 1962 [July 18, 1961], No. 26010/61. Heading H2B. [Also in Division H3] An apparatus for controlling the instant of operation of a circuit-breaker includes means responsive to input signals representative of the instantaneous value of the alternating current to be interrupted and of the phase of the current with respect to the voltage and providing a circuit-breaker operating signal at the instantaneous optimum operating time with respect to a current zero. In the arrangement of Fig. 1, current and voltage signals are applied respectively to comparators 13 and 14 which give outputs to a gate circuit 15 when the instantaneous values of the signals are zero. The circuit 15 gives a square output pulse which is started and stopped by the output pulses from 14 and 13 so that the length of the output pulse from 15 is representative of the phase angle between the current and voltage and determines the number of pulses given from an oscillator 16 and stored in a counter 17. The alternating current signal is also applied through a halfwave rectifier 18 to an amplitude discriminator 19 (see Division H3) which gives an output representative of the peak amplitude of the line current to be broken. The information concerning phase angle (from 17) and current amplitude is fed to a logic matrix 21 which in conjunction with a system of delay channels 23 causes a triggering pulse to be sent to the circuit-breaker operating mechanism at the appropriate time in the current cycle as determined by the magnitude of the current and its phase angle. A timing pulse generator 20 triggers and resets the various circuit elements. This apparatus may control an air-break, airblast, oil, or vacuum circuit-breaker. Fig. 6 shows a suggested circuit-breaker arrangement in which the energization of spiral coils 63, 65 causes the repulsion of conductive discs 62, 64 so that initially both contacts 52, 53 move together until the movement of the contact 53 abruptly ceases due to the disc 64 abutting a stop 66. The contact 52 moves to its open position under the control of the over-centre spring toggle mechanism shown. The energization of the coils may be provided by the discharge of a charged capacitor, the discharge being initiated through a spark-gap in response to the output from the delay channels 23.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB26010/61A GB969915A (en) | 1961-07-18 | 1961-07-18 | Improvements in or relating to electrical circuit-breakers |
US210457A US3206642A (en) | 1961-07-18 | 1962-07-17 | Electrical circuit breakers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB26010/61A GB969915A (en) | 1961-07-18 | 1961-07-18 | Improvements in or relating to electrical circuit-breakers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB969915A true GB969915A (en) | 1964-09-16 |
Family
ID=10236930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26010/61A Expired GB969915A (en) | 1961-07-18 | 1961-07-18 | Improvements in or relating to electrical circuit-breakers |
Country Status (2)
Country | Link |
---|---|
US (1) | US3206642A (en) |
GB (1) | GB969915A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2130436A (en) * | 1982-10-23 | 1984-05-31 | Hawker Siddeley Revenue Contr | Zero crossing circuit for arcing preventing in circuit breakers |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3283179A (en) * | 1963-09-17 | 1966-11-01 | Vapor Corp | Apparatus for and method of zero switching |
US3555354A (en) * | 1969-03-11 | 1971-01-12 | Gen Electric | Alternating current circuit breaker having a control for timing opening relative to the current wave |
US3694694A (en) * | 1970-12-29 | 1972-09-26 | Burndef Corp | Arc testing device |
CH541227A (en) * | 1971-11-22 | 1973-10-15 | Siemens Ag | Pre-release device for a synchronous switch |
US5928475A (en) * | 1996-12-13 | 1999-07-27 | Honeywell-Measurex, Corporation | High resolution system and method for measurement of traveling web |
US6341522B1 (en) | 1996-12-13 | 2002-01-29 | Measurex Corporation | Water weight sensor array imbedded in a sheetmaking machine roll |
US5944955A (en) * | 1998-01-15 | 1999-08-31 | Honeywell-Measurex Corporation | Fast basis weight control for papermaking machine |
US6092003A (en) * | 1998-01-26 | 2000-07-18 | Honeywell-Measurex Corporation | Paper stock shear and formation control |
US6076022A (en) * | 1998-01-26 | 2000-06-13 | Honeywell-Measurex Corporation | Paper stock shear and formation control |
US6080278A (en) * | 1998-01-27 | 2000-06-27 | Honeywell-Measurex Corporation | Fast CD and MD control in a sheetmaking machine |
US6168687B1 (en) * | 1998-04-24 | 2001-01-02 | Honeywell-Measurex Corporation | System and method for sheet measurement and control in papermaking machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2381527A (en) * | 1941-07-31 | 1945-08-07 | Gen Electric | Protective apparatus |
US2372139A (en) * | 1942-06-12 | 1945-03-20 | Westinghouse Electric & Mfg Co | Synchronously tripped circuit breaker |
US2771577A (en) * | 1951-07-20 | 1956-11-20 | Fkg Fritz Kesselring Geratebau | Electromagnetic switching circuits |
DE1072678B (en) * | 1958-07-23 | 1960-01-07 | Siemens-Schuckertwerke Aktiengesellschaft, Berlin Und Erlangen | Device for the synchronous switching off of a switch |
-
1961
- 1961-07-18 GB GB26010/61A patent/GB969915A/en not_active Expired
-
1962
- 1962-07-17 US US210457A patent/US3206642A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2130436A (en) * | 1982-10-23 | 1984-05-31 | Hawker Siddeley Revenue Contr | Zero crossing circuit for arcing preventing in circuit breakers |
Also Published As
Publication number | Publication date |
---|---|
US3206642A (en) | 1965-09-14 |
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