US2405121A - Counting device for overvoltage - Google Patents

Counting device for overvoltage Download PDF

Info

Publication number
US2405121A
US2405121A US497441A US49744143A US2405121A US 2405121 A US2405121 A US 2405121A US 497441 A US497441 A US 497441A US 49744143 A US49744143 A US 49744143A US 2405121 A US2405121 A US 2405121A
Authority
US
United States
Prior art keywords
counting
current
resistance
voltage
overvoltage
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 - Lifetime
Application number
US497441A
Other languages
English (en)
Inventor
Fehr Paul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Landis and Gyr AG filed Critical Landis and Gyr AG
Application granted granted Critical
Publication of US2405121A publication Critical patent/US2405121A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/02—Input circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/04—Arrangements for displaying electric variables or waveforms for producing permanent records
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • 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
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/048—Checking overvoltage diverters

Definitions

  • a part of the voltage drop caused by the deflected (or discharged) current is tapped and conveyed to the tWo coatings of a condenser to which an electro-magnetically perated counting train is placed in parallel. After having been charged, the condenser discharges itself over the counting train and moves the same forward by one step.
  • Another known type utilizes the thermal action of the deflected current by passing an endless strip of paper longitudinally and transversely between a spark gap, whereby the strip gets punctured at the incidence of a voltage surge.
  • the purpose of all these known devices is to provide a check of the behaviour of the overvoltage conductor during the service and, for instance, to ascertain how often the excess voltage conductor is affected during a, thunderstorm and thus protects the plant from damage; in which part of the overhead line the lightning conductors have acted and, if possible, to measure the approximate strength of the discharged current.
  • the present invention for counting momentary current impulses is characterized by the fact that a fraction of the deflected currents flowing through the conductance resistance is conveyed over a resistance which is in a tank filled with gas, whereby the gas expands under the influence of the ensuing heating and actuates the counting device through the medium of a flexible diaphragm.
  • Fig. 1 shows a diagram of the arrangement.
  • Fig. 2 is a cross-section of the gas-filled counting tank and Figs. 3 and 4 illustrate other forms of embodiment.
  • the invention is based on the utilization of the thermal action of the deflected current, whereby thisaccording to the diagrammatic representation in Fig. 1is conveyed over a filament resistance I, which is in the counting tank 2 filled with gas.
  • the closure of the tank 2 forms a flexible metallic diaphragm 3 being in connection with a counting train 4.
  • the counting device is interposed between protective conductor 6 and grounded conductor 1, whereby the deflected current passes via the parallel connection of a voltage-dependent resistance 8 and a reactor (or choking coil) 9.
  • the counting train 4 and the metallic diaphragm 3 are mechanically interconnected.
  • Fig. 2 represents a sectional view of a form of embodiment of the actuating device for the counting train.
  • the numeral 3 designates a diaphragm consisting of a corrugated metallic tube or pipe being slightly extensible in axial direction.
  • the tube piece with flange 10 serves as connection between the corrugated metallic tube and the glass foot sealed onto it.
  • the tank thus formed accommodates inside a filament resistance I carried by supports 12 that are adapted as current leads.
  • the hollow space is filled with an inert gas possessing a small specific heat value.
  • a socket [3 with connecting plug l4 holds the whole arrangement together. 7
  • a pin I5 is provided which transfers the movement of the diaphragm via the lever l6 by means of toothed segment I! and gear wheel l8 onto the counting train I 9.
  • the deflected current produces at the voltage-dependent resistance 8 a voltage drop.
  • This voltage drop results in the transfer of a fraction of the deflected current over the filament resistance I, heating it.
  • the heat thus produced i given off to the gas in the counting tank, which gas expands in consequence of its warming and drives the diaphragm 3 forwards, so that the pin [5 presses against the lever I6 which-by means of the toothed segment I'lturns the gear wheel I8 and hence the counting train l9.
  • resistance 8 has a tendency to smooth or flatten the voltage rise across it as current goes up and preserves filament resistance i from destruction in case of intense discharge.
  • the reactor 9 connected in paralle1 to the voltage-dependent resistance 8 has in turn for its task to withhold from the counting tank the succeeding current emanating from the line voltage, which current flows after the proper rush dis charge.
  • This is achieved by selecting such a value for the inductance of the reactor 9 that its impedance for the rush discharge is very high.
  • a comparatively small inductance is required for this purpose due to the steep current surge.
  • Such a small inductance offers a low impedance for the succeeding current after the initial steep wave front has passed.
  • Such deviation of the succeedin current is necessary because its I Rt-Value may assume very high figures, and this would lead to the destruction of the filament resistance.
  • the device may likewise be so disposed that the pin :5 of the diaphragm directly controls a contact (Fig. 3) which operates a relay 22, thus actuating the counting train 3-.
  • the counting train be driven by a clockwork 23 (see Fig. 4) and that the axial shifting of the pin !5 causes the clockwork to run down or arrests it by releasing the disk 25 for one revolution at a time. This, for instance, is brought about so, that the pin 55 in its rest position impedes the disk 25 from rotating because it is in the path of an arresting pin 25. If the pin I5 4 moves upwards, the disk is set free and performs an almost complete revolution, that is until an arrestin stud 2'! engages the pin l5. By this rotation the counting train has meanwhile been driven through one figure only.
  • the aforedescribed arrangement is adapted inv its employment for the counting and in combination with a suitable recording device for determining the approximate strength or the deflected current, whereby the expansion of the diaphragm is utilized as a base value.
  • a device for counting momentary power surges such as caused by lightning on a transmisline said ce including a main current conducting path, a resistance shunted across said main current conducting path, a gas-filled exoarsicle cherub-er surrounding said resistance wi the gas oeing heated by said resistance, a counting device associated with said expansible chamber to be operated by each expansion cycle.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Recording Measured Values (AREA)
  • Fuses (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Emergency Protection Circuit Devices (AREA)
US497441A 1942-11-07 1943-08-05 Counting device for overvoltage Expired - Lifetime US2405121A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH229050T 1942-11-07

Publications (1)

Publication Number Publication Date
US2405121A true US2405121A (en) 1946-08-06

Family

ID=32180081

Family Applications (2)

Application Number Title Priority Date Filing Date
US497441A Expired - Lifetime US2405121A (en) 1942-11-07 1943-08-05 Counting device for overvoltage
US585361A Expired - Lifetime US2493448A (en) 1942-11-07 1945-03-28 Arrangement for counting and measuring electric current impulses of short duration

Family Applications After (1)

Application Number Title Priority Date Filing Date
US585361A Expired - Lifetime US2493448A (en) 1942-11-07 1945-03-28 Arrangement for counting and measuring electric current impulses of short duration

Country Status (7)

Country Link
US (2) US2405121A (ko)
BE (1) BE460789A (ko)
CH (2) CH229050A (ko)
DE (1) DE861895C (ko)
FR (2) FR898240A (ko)
GB (2) GB566645A (ko)
NL (1) NL62344C (ko)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515677A (en) * 1947-05-23 1950-07-18 Rca Corp Direct current limiter and counter circuit
US2528744A (en) * 1944-11-30 1950-11-07 Landis & Gyr Ag Electromagnetic appliance
US2550460A (en) * 1950-04-06 1951-04-24 George M Farly Monitoring circuit
US2557848A (en) * 1948-05-28 1951-06-19 Rca Corp Arc-back counter
DE863697C (de) * 1951-02-22 1953-01-19 Brown Ag Geraet zum Zaehlen von Rueckzuendungen in Mutatoren
US2625822A (en) * 1949-06-15 1953-01-20 Taylor Instr Compagnies Digital indicating arrangement for measuring systems
US2888198A (en) * 1954-03-24 1959-05-26 Westinghouse Electric Corp Automatic circuit reclosers
US3020727A (en) * 1959-11-02 1962-02-13 Dole Valve Co Heat motor for a rotary ice tray
US3248871A (en) * 1960-09-30 1966-05-03 Jr John E Lindberg Method and apparatus for power transmission and actuation
US3538440A (en) * 1968-08-30 1970-11-03 Westinghouse Electric Corp Voltage detector for shielded conductor providing substantially constant output voltage over wide range of input voltage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630860A (en) * 1946-08-31 1953-03-10 Affiliated Gas Equipment Inc Burner control means
DE1041124B (de) * 1957-02-11 1958-10-16 W Helmut Schmidt Anzeigevorrichtung fuer Blitzeinschlaege in Hausblitzschutzanlagen
US3766536A (en) * 1971-12-15 1973-10-16 Gen Motors Corp Catalytic converter monitor
FR2452175A1 (fr) * 1979-03-23 1980-10-17 Alsthom Unelec Sa Appareil electrique de coupure dans l'air muni d'un dispositif indicateur de court-circuit

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US884047A (en) * 1908-01-13 1908-04-07 John E Shepherd Automatic alarm system.
US1056459A (en) * 1908-01-20 1913-03-18 Automatic Fire Prot Company Automatic fire-protection signal system.
US989347A (en) * 1910-05-02 1911-04-11 Internat Electric Prot Company Electrical thermostat.
US1695534A (en) * 1925-02-27 1928-12-18 William C Carter Pump diaphragm
US1899746A (en) * 1929-04-03 1933-02-28 Westinghouse Electric & Mfg Co Protective system for transformers
US2024060A (en) * 1933-05-23 1935-12-10 Roberto J Peralta Electric current control device
US2021079A (en) * 1934-04-23 1935-11-12 Crosley Radio Corp Restricted flow device
US2227668A (en) * 1938-08-11 1941-01-07 Jules F Bonal Governor
US2271307A (en) * 1938-10-21 1942-01-27 William A Ray Thermal operator

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528744A (en) * 1944-11-30 1950-11-07 Landis & Gyr Ag Electromagnetic appliance
US2515677A (en) * 1947-05-23 1950-07-18 Rca Corp Direct current limiter and counter circuit
US2557848A (en) * 1948-05-28 1951-06-19 Rca Corp Arc-back counter
US2625822A (en) * 1949-06-15 1953-01-20 Taylor Instr Compagnies Digital indicating arrangement for measuring systems
US2550460A (en) * 1950-04-06 1951-04-24 George M Farly Monitoring circuit
DE863697C (de) * 1951-02-22 1953-01-19 Brown Ag Geraet zum Zaehlen von Rueckzuendungen in Mutatoren
US2888198A (en) * 1954-03-24 1959-05-26 Westinghouse Electric Corp Automatic circuit reclosers
US3020727A (en) * 1959-11-02 1962-02-13 Dole Valve Co Heat motor for a rotary ice tray
US3248871A (en) * 1960-09-30 1966-05-03 Jr John E Lindberg Method and apparatus for power transmission and actuation
US3538440A (en) * 1968-08-30 1970-11-03 Westinghouse Electric Corp Voltage detector for shielded conductor providing substantially constant output voltage over wide range of input voltage

Also Published As

Publication number Publication date
FR53800E (fr) 1946-09-06
FR898240A (fr) 1945-04-13
GB589276A (en) 1947-06-16
BE460789A (ko) 1945-11-30
CH229050A (de) 1943-09-30
US2493448A (en) 1950-01-03
GB566645A (en) 1945-01-08
DE861895C (de) 1953-01-08
CH238954A (de) 1945-08-31
NL62344C (ko) 1948-08-06

Similar Documents

Publication Publication Date Title
US2405121A (en) Counting device for overvoltage
US2437772A (en) Electrical harness tester circuit
US2508954A (en) Electric discharge device with auxiliary electrode
US2081839A (en) High-voltage current-responsive apparatus
US3147380A (en) Nuclear bomb explosion detecting device
US2637769A (en) Means for suppressing arcing at contacts breaking a direct current inductive circuit
US3312895A (en) Transmission line monitor apparatus utilizing electromagnetic radiation between the line and a remote point
US2165848A (en) Protection of high frequency lines
US2963620A (en) Sensing igniter
US2481003A (en) Protective arrangement for switch contacts
US2977506A (en) Electronic ignition system
US2185292A (en) Impulse voltage testing equipment
US2254175A (en) Cam angle tester
US2854660A (en) Horn circuit
US2433650A (en) Ignition system
US2562692A (en) Overvoltage protective device
US3450946A (en) Protective circuit of the spark gap type
US3171057A (en) Nuclear flash simulator
GB1233511A (ko)
US2258669A (en) Electrical fence charging apparatus
US2520956A (en) Breakdown indicator for insulated aircraft antennas
US2208752A (en) Volume limiter circuit
US2546008A (en) Series-capacitor protective system
US1291218A (en) Universally-gradable suspension-insulator.
US2569474A (en) Electrode structure for gaseous discharge devices