GB1312643A - High voltage electric circuit breakers - Google Patents
High voltage electric circuit breakersInfo
- Publication number
- GB1312643A GB1312643A GB3409070A GB3409070A GB1312643A GB 1312643 A GB1312643 A GB 1312643A GB 3409070 A GB3409070 A GB 3409070A GB 3409070 A GB3409070 A GB 3409070A GB 1312643 A GB1312643 A GB 1312643A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- polarity
- charge
- output
- input
- 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
- 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
- H01H9/563—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 for multipolar switches, e.g. different timing for different phases, selecting phase with first zero-crossing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/16—Impedances connected with contacts
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
- Measurement Of Current Or Voltage (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
1312643 Electric switches GENERAL ELECTRIC CO 14 July 1970 [23 July 1969] 34090/70 Heading H1N [Also in Division H3] In order to avoid undesirable voltage surges when connecting a supply line 121, Fig. 1, to a load line, when the latter may have retained an appreciable charge, connection is made at a voltage peak of polarity similar to that of the charge. Voltage dropping capacitors 70, 72, connected across the supply line of one phase and earth, supply an input to a zero crossing detector 75 which produces a pulse 76 each time the voltage passes through zero, so providing a datum for timing. A closing logic circuit 78 receives these pulses and also the output from a trapped charge detector 83, which gives an output indicative of the polarity of the charge provided it is above a predetermined minimum magnitude. When a zero pulse of the same polarity as the charge is received, the circuit 78, through a circuit 100, giving an appropriate time delay, releases latch 43 to close sequential switches 28, 32, 22. The trapped charge indicator, Fig. 3, receives an input from the line 12 through voltage divider 80, 82, this input corresponding in polarity with the charge on the line. This is passed through amplifiers 156, 157, connected to give positive feedback through resistor 159 and consequently continuing to give an output on lead 85 of appropriate polarity once an input signal has been received. The closing logic circuit 78, Fig. 4, comprises two flip-flops 180, 181 such that when the polarities of their terminals A, B are as shown, neither can be turned on by a positive input on line 84, the reverse set of conditions also being true. The polarity of these terminals A, B is determined by the polarity on the line 85, i.e. the output of the charge detector, and thus only when the pulse received on line 84, from the zero crossing detector, is of the same polarity as that on line 85 is an output passed through line 88 to trip the closing latch.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US84405669A | 1969-07-23 | 1969-07-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1312643A true GB1312643A (en) | 1973-04-04 |
Family
ID=25291686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3409070A Expired GB1312643A (en) | 1969-07-23 | 1970-07-14 | High voltage electric circuit breakers |
Country Status (6)
Country | Link |
---|---|
US (1) | US3566152A (en) |
CH (1) | CH529434A (en) |
DE (1) | DE2036060A1 (en) |
FR (1) | FR2055549A5 (en) |
GB (1) | GB1312643A (en) |
SE (1) | SE355690B (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3995198A (en) * | 1973-05-14 | 1976-11-30 | Licentia Patent-Verwaltungs-G.M.B.H. | High voltage circuit breaker |
DE2503034C3 (en) * | 1975-01-25 | 1978-05-11 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Process for reducing the mechanical stress on turbo sets in the case of three-pole network short-circuits close to the generator |
US4001643A (en) * | 1975-05-29 | 1977-01-04 | The United States Of America As Represented By The Secretary Of The Interior | Method and apparatus for a power circuit breaker controller |
US4306263A (en) * | 1980-03-28 | 1981-12-15 | Gould Inc. | Synchronous closing system and latch therefor |
US4423363A (en) * | 1981-07-27 | 1983-12-27 | General Electric Company | Electrical braking transitioning control |
GB2130436A (en) * | 1982-10-23 | 1984-05-31 | Hawker Siddeley Revenue Contr | Zero crossing circuit for arcing preventing in circuit breakers |
JPS59105226A (en) * | 1982-12-09 | 1984-06-18 | 株式会社日立製作所 | Breaker |
US4864157A (en) * | 1988-05-12 | 1989-09-05 | Spatron Corporation | Reduced arcing contact switching circuit |
US5764459A (en) * | 1994-10-18 | 1998-06-09 | Yang; Tai-Her | DC circuit breaking spark suppressor device |
US5666257A (en) * | 1994-10-18 | 1997-09-09 | Yang; Tai-Her | DC circuit breaking spark suppressor circuit device |
US7057311B1 (en) | 2003-03-21 | 2006-06-06 | Eaton Corporation | Isolation contactor assembly having independently controllable contactors |
US7196434B2 (en) * | 2003-03-21 | 2007-03-27 | Eaton Corporation | Modular contactor assembly having independently controllable contractors |
US20040212353A1 (en) * | 2003-04-25 | 2004-10-28 | Siemens Westinghouse Power Corporation | Use of a closing impedance to minimize the adverse impact of out-of-phase generator synchronization |
JP2007514044A (en) * | 2003-12-12 | 2007-05-31 | コールテク コーポレイション | Method and system for preheated drying process to improve solid fuel properties |
US8585788B2 (en) * | 2006-03-31 | 2013-11-19 | Coaltek, Inc. | Methods and systems for processing solid fuel |
US8585786B2 (en) * | 2006-03-31 | 2013-11-19 | Coaltek, Inc. | Methods and systems for briquetting solid fuel |
SE541330C2 (en) * | 2017-11-30 | 2019-07-09 | Scania Cv Ab | An arrangement and a method for controlling a disconnector in a motor vehicle |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3312864A (en) * | 1963-08-23 | 1967-04-04 | Westinghouse Electric Corp | Protective relaying devices |
US3373290A (en) * | 1965-12-13 | 1968-03-12 | Boeing Co | Polyphase current control system |
SE304784B (en) * | 1966-04-07 | 1968-10-07 | Stenberg Flygt Ab | |
US3500009A (en) * | 1967-02-24 | 1970-03-10 | Gen Electric | High voltage circuit breaker with means for preinserting resistors during closing |
US3471749A (en) * | 1967-05-03 | 1969-10-07 | Rochester Instr Systems Inc | System for controlling automatic reclosure of a power circuit breaker |
-
1969
- 1969-07-23 US US3566152D patent/US3566152A/en not_active Expired - Lifetime
-
1970
- 1970-06-30 CH CH991070A patent/CH529434A/en not_active IP Right Cessation
- 1970-07-14 GB GB3409070A patent/GB1312643A/en not_active Expired
- 1970-07-20 SE SE1000370A patent/SE355690B/xx unknown
- 1970-07-21 DE DE19702036060 patent/DE2036060A1/en active Pending
- 1970-07-23 FR FR7027269A patent/FR2055549A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
SE355690B (en) | 1973-04-30 |
CH529434A (en) | 1972-10-15 |
US3566152A (en) | 1971-02-23 |
FR2055549A5 (en) | 1971-05-07 |
DE2036060A1 (en) | 1971-01-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |