NO800972L - POWER SUPPLY PROTECTION CONNECTION WITH TYRISTOR BETWEEN GOODS AND EARTH - Google Patents
POWER SUPPLY PROTECTION CONNECTION WITH TYRISTOR BETWEEN GOODS AND EARTHInfo
- Publication number
- NO800972L NO800972L NO800972A NO800972A NO800972L NO 800972 L NO800972 L NO 800972L NO 800972 A NO800972 A NO 800972A NO 800972 A NO800972 A NO 800972A NO 800972 L NO800972 L NO 800972L
- Authority
- NO
- Norway
- Prior art keywords
- connection
- potential
- stated
- thyristor
- load
- Prior art date
Links
- 230000007935 neutral effect Effects 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- H02H3/14—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 occurrence of voltage on parts normally at earth potential
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/008—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for protective arrangements according to this subclass
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Description
Oppfinnelsen angår strømforsynings-vernekoblinger. Slike omfatter i alminnelighet en lastbryter innskutt i minst én faseledning i strømtilførselen til et forbruksapparat som dessuten har en klemme på lokalt godspotensial. Lastbryteren er ofte av typen med et relé med bruddkontakter ikke bare i faseledningen eller -ledningene, men for det meste også i den nøytrale ledning i strømtilførselen til forbruksapparatet. The invention relates to power supply-protective circuits. These generally include a load switch inserted into at least one phase line in the power supply to a consumer device which also has a clamp on local load potential. The load switch is often of the type with a relay with breaking contacts not only in the phase line or lines, but mostly also in the neutral line in the power supply to the consumer device.
I alminnelighet skjer styringen av lastbryteren fraIn general, the control of the on-load switch takes place from
en differensial-transformator med viklinger i faseledningen eller -ledningene og i den nøytrale ledning. Enhver feilstrøm frembringer da en spenning på differensialtransformatorens sekundærside, og denne spenning utnyttes til styring av lastbryteren. a differential transformer with windings in the phase line or lines and in the neutral line. Any fault current then produces a voltage on the secondary side of the differential transformer, and this voltage is used to control the on-load switch.
Ulempen ved denne styring med differensialtransformatorer ligger i at det er vanskelig å gi disse en tilstrekkelig følsomhet, særlig om man ønsker å unngå at brukerne får farlig støt. The disadvantage of this control with differential transformers lies in the fact that it is difficult to give them sufficient sensitivity, especially if you want to avoid users receiving dangerous shocks.
Forøvrig er det når det gjelder anvendelser hos det store publikum, nødvendig at vernekoblingen er meget enkel og kan fremstilles billig. Den foreliggende oppfinnelse gjør det mulig å forene disse krav. Furthermore, when it comes to applications by the general public, it is necessary that the protective coupling is very simple and can be produced cheaply. The present invention makes it possible to reconcile these requirements.
Sagt generelt omfatter koblingen en styrt avbryter som er anordnet i serie med lastbryterens vikling i dens strømforsynings-krets. Den styrte avbryters strømforsyningskrets er anordnet i serie, mellom klemmen med lokalt godspotensial og et punkt som har potensial null i forhold til jord og fordelaktig ligger på jordledningen fra nettavsnittets transformatorstasjon. Generally speaking, the coupling comprises a controlled interrupter which is arranged in series with the on-load switch winding in its power supply circuit. The controlled interrupter's power supply circuit is arranged in series, between the clamp with local load potential and a point that has zero potential in relation to earth and is advantageously located on the earth wire from the grid section's substation.
Ifølge et annet viktige særtrekk ved oppfinnelsen er denAccording to another important distinctive feature of the invention, it is
styrte avbryter en tyristor hvis styreelektrode via en motstand er forbundet med klemmen for lokalt godspotensial, mens dens katode er forbundet med punktet med nullpotensial og dens anode med viklingen hos lastbryterens relé eller elektromagnet. controlled interrupts a thyristor whose control electrode is connected via a resistor to the terminal for local load potential, while its cathode is connected to the point of zero potential and its anode to the winding of the on-load switch relay or electromagnet.
Ved en spesiell utførelsesform er en diode innskutt medIn a special embodiment, a diode is inserted
motsatt strømretning mellom tyristorens katode og styreelektrode. Ved visse tyristorer og særlig ved slike som er meget følsomme, opposite current direction between the thyristor's cathode and control electrode. In the case of certain thyristors and in particular those that are very sensitive,
er det ønskelig å parallellkoble en ytterligere motstand mellom tyristorens katode og styreelektrode. is it desirable to connect an additional resistor in parallel between the thyristor's cathode and control electrode.
Meget fordelaktig omfatter vernekoblingen dessuten et ledningsterskel-element innkoblet mellom enden av den første motstand på siden for lokalt godspotensial og tyristorens katode. Fortrinnsvis er terskelelementet en ikke-lineær motstand, f.eks. Very advantageously, the protective coupling also comprises a conduction threshold element connected between the end of the first resistance on the side for local load potential and the cathode of the thyristor. Preferably, the threshold element is a non-linear resistance, e.g.
en metalloksyd-baristor.a metal oxide baristor.
I praksis blir elektromagnetens spenningsførende pol tilknyttet faseledningen bak kontakten på lastbryteren. Som tidligere nevnt er det i alminnelighet ønskelig at lastbryteren også har en kontakt til åpning av den nøytrale ledning. In practice, the voltage-carrying pole of the electromagnet is connected to the phase line behind the contact on the load switch. As previously mentioned, it is generally desirable that the load switch also has a contact for opening the neutral wire.
Ifølge enda et trekk ved oppfinnelsen er lastbryterenAccording to yet another feature of the invention is the load switch
av typen med åpningskommando-hukommelse, så den bare behøver en kort strømpuls fra tyristoren for å magnetisere elektromagneten. Vernekoblingen er da fordelaktig supplert med en anordning, fortrinnsvis av mekanisk type, til gjeninnkobling av lastbryteren. of the type with opening command memory, so it only needs a short current pulse from the thyristor to magnetize the electromagnet. The safety switch is then advantageously supplemented with a device, preferably of a mechanical type, for reconnecting the on-load switch.
Ytterligere trekk og fordeler ved oppfinnelsen vil fremgå av den følgende beskrivelse, som anføres for å anskueliggjøre en ikke-begrensende foretrukken utførelsesform for oppfinnelsen, og hvor der henvises til tegningen, som er et prinsippskjerna for en strømforsynings-vernekobi ing ifølge oppfinnelsen. Further features and advantages of the invention will be apparent from the following description, which is given to illustrate a non-limiting preferred embodiment of the invention, and where reference is made to the drawing, which is a principle core for a power supply protection coupling according to the invention.
På tegningen ses til venstre en lokal transformatorstasjon hvorfra der fører minst én faseledning 1, en ledning 2 med nøytralt potensial såvel som en jordledning 6. Disse ledninger forløper gjennom fordelingsnettet frem til brukeren, hvor de sluttelig ender ved et forbruksapparat 9. Dreier det seg om et enfaset apparat, har dette en klemme 3 forbundet med faseledningen, en klemme 4 forbundet med nøytralledningen og en klemme 5 på lokalt godspotensial . On the left side of the drawing you can see a local transformer station from which leads at least one phase line 1, a line 2 with neutral potential as well as an earth line 6. These lines run through the distribution network to the user, where they finally end at a consumer device 9. Is it about a single-phase device, this has a terminal 3 connected to the phase line, a terminal 4 connected to the neutral line and a terminal 5 on the local load potential.
Et lastbryterrelé 20 styrer via en magnetkrets 21 to kontakter 211 og 212 anordnet i serie i henholdsvis fase- og nøytralledningen. A load switch relay 20 controls via a magnetic circuit 21 two contacts 211 and 212 arranged in series in the phase and neutral line respectively.
Søkeren har iakttatt at fprbruksapparatene til husbruk, i alminnelighet av typen større elektriske husholdningsapparater, ikke som følge av sin fysiske installasjon har særlig god jording av sitt lokale gods. Dette fører til en viss elektrisk motstand mellom klemmen 5 på lokalt godspotensial og jordpotensialet, som konvensjonelt antas som potensial 0. Denne iakttagelse er der tatt hensyn til ved verneanordning°n ifølge oppfinnelsen. The applicant has observed that the appliances for domestic use, generally of the type of larger electrical household appliances, do not, as a result of their physical installation, have a particularly good grounding of their local goods. This leads to a certain electrical resistance between the clamp 5 at the local load potential and the ground potential, which is conventionally assumed to be potential 0. This observation is taken into account in the protective device according to the invention.
På tegningen ses den ene klemme på magnetviklingen 20 åThe drawing shows one clamp on the magnet winding 20 Å
være forbundet med faseledningen bak kontakten 211, mens dens annen klemme er forbundet med anoden h/->s en tyristor 16 hvis katode er direkte forbundet med jordledningen 6. Tyristorens styreelektrode er dels via en motstand 14 forbundet med klemmen på lokalt godspotensial hos forbruksapparatet og dels via en motsatt koblet diode forbundet med den samme tyristors katode. be connected to the phase line behind the contact 211, while its other terminal is connected to the anode h/->s a thyristor 16 whose cathode is directly connected to the ground line 6. The control electrode of the thyristor is partly connected via a resistor 14 to the terminal on the local load potential of the consumer device and partly via an oppositely connected diode connected to the cathode of the same thyristor.
Dessuten er der mellom den frie. ende av motstanden 14 på siden for lokalt gods og katoden hos tyristoren 16 innskutt et element med ikke-lineær ledningsevne, f.eks. en metalloksyd-varistor. Dette ikke-lineære element har til oppgave å begrense den spenning som vil kunne opptre i den ene eller den annen retning mellom styreelektroden og katoden hos tyristoren, for å unngå skade på denne. Moreover, there is between the free. end of the resistor 14 on the side for local goods and the cathode of the thyristor 16 insert an element with non-linear conductivity, e.g. a metal oxide varistor. The task of this non-linear element is to limit the voltage that may occur in one direction or the other between the control electrode and the cathode of the thyristor, in order to avoid damage to it.
Sluttelig er det når det gjelder visse typer av tyristorer, spesielt slike av plan type med stor følsomhet, funnet ønskelig å skyte inn en motstand 18 mellom tyristorens styreelektrode og katode for å begrense uvedkommende utløsninger som forårsakes av variasjoner dV/dt (derivat av spenning med hensyn på tid), Finally, when it comes to certain types of thyristors, especially those of the planar type with high sensitivity, it has been found desirable to insert a resistor 18 between the thyristor's control electrode and cathode in order to limit extraneous discharges caused by variations dV/dt (derivative of voltage with consideration of time),
og som kan ventes å opptre mellom disse to klemmer.and which can be expected to appear between these two clamps.
Virkemåten av den angitte kobling er som følger:The operation of the specified link is as follows:
- Under normale forhold er der meget god isolasjon mellom faseklemmen og kapselen hos forbruksapparatet 9, og der blir derfor ikke påtrykt noen spenning på klemmen 5 med normalt godspotensial. - Hvis der derimot inntrer en isolasjonsfeil mellom faseklemmen og apparatkapselen i det indre av denne, eller hvis en bruker kommer til å berøre faseklemmen mens han samtidig er i fysisk kontakt med lokalt gods, f.eks. en eller annen tilgjengelig del i boligen, vil der gå en strøm mellom faseledningen 1 og lokalt gods. I betraktning av at motstanden mellom lokalt gods og jord ikke er null, vil der da inntre en potensial-forskjell mellom klemmen 5 og jordledningen 6. Denne potensialforskjell.vil via motstanden 14 med sine positive halvbølger utløse styreelektroden hos tyristoren 16. Tyristoren, som dermed øyeblikkelig blir ledende, utløser releet 20, 21, som åpner kontaktene 211 og 212, så feilstrømmen øyeblikkelig forsvinner. - Under normal conditions, there is very good insulation between the phase clamp and the capsule of the consumer device 9, and therefore no voltage is applied to the clamp 5 with normal load potential. - If, on the other hand, an insulation fault occurs between the phase clamp and the device capsule in the interior of this, or if a user touches the phase clamp while at the same time being in physical contact with local goods, e.g. one or another accessible part of the home, a current will flow between phase line 1 and local goods. Considering that the resistance between local goods and ground is not zero, a potential difference will then occur between the clamp 5 and the ground wire 6. This potential difference will via the resistance 14 with its positive half-waves trigger the control electrode of the thyristor 16. The thyristor, which thus instantly becomes conductive, triggers relay 20, 21, which opens contacts 211 and 212, so the fault current instantly disappears.
Det ses således at.den viste kobling er egnet til å sikreIt can thus be seen that the connection shown is suitable for securing
en ypperlig beskyttelse såvel mot tilfeldige feil i et apparat som mot farlige elektriske støt på brukerne, særlig i hus-installasjoner hvor der praktisk talt alltid finnes en motstand som riktignok er liten, men ikke absolutt null, mellom gods (i alminnelighet uriktig betegnet som "jord") og virkelig nullpotensial mot jord. an excellent protection both against accidental errors in a device and against dangerous electric shocks to the users, especially in house installations where there is practically always a resistance that is admittedly small, but not absolutely zero, between goods (generally incorrectly termed as " ground") and true zero potential to ground.
Ved en spesiell utførelsesform for oppfinnelsen har lastbryteren to kontakter som normalt er belastet mot åpning, men holdes lukket av en utløsningsinnretning utstyrt med slå som utløses av magnetkretsen 21 når viklingen 20 får strøm. Fornyet In a particular embodiment of the invention, the load switch has two contacts which are normally loaded against opening, but are kept closed by a release device equipped with a switch which is triggered by the magnetic circuit 21 when the winding 20 is energized. Renewed
sperring skjer manuelt.blocking is done manually.
Forøvrig kan koblingens komponenter være som følger:Otherwise, the coupling's components can be as follows:
- Tyristor modell C106D fra General Electric,- Thyristor model C106D from General Electric,
- Motstand 14 220 ohm,- Resistance 14,220 ohms,
- motstand 18 470 ohm,- resistance 18,470 ohms,
- diode 12 av typen 1 ampere,- diode 12 of the 1 ampere type,
- varistor 19 av typen V 18Z A 3 fra General Electric.- varistor 19 of the type V 18Z A 3 from General Electric.
Det sier seg selv at oppfinnelsen ikke er begrenset til den beskrevne utførelsesform, idet den dekker en hvilken som helst variant i samsvar med oppfinnelsestanken. It goes without saying that the invention is not limited to the described embodiment, as it covers any variant in accordance with the inventive idea.
Claims (10)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7908904A FR2454206A1 (en) | 1979-04-09 | 1979-04-09 | ELECTRICAL SECURITY SUPPLY WITH THYRISTOR BETWEEN MASS AND EARTH |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO800972L true NO800972L (en) | 1980-10-10 |
Family
ID=9224124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO800972A NO800972L (en) | 1979-04-09 | 1980-04-01 | POWER SUPPLY PROTECTION CONNECTION WITH TYRISTOR BETWEEN GOODS AND EARTH |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0018867A3 (en) |
| JP (1) | JPS55141922A (en) |
| AR (1) | AR221933A1 (en) |
| BR (1) | BR8002148A (en) |
| FR (1) | FR2454206A1 (en) |
| MX (1) | MX146857A (en) |
| NO (1) | NO800972L (en) |
| PT (1) | PT71065A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4375660A (en) * | 1981-02-03 | 1983-03-01 | Tektronix, Inc. | Ground isolation monitoring apparatus having a protective circuit |
| FR2500210A1 (en) * | 1981-02-18 | 1982-08-20 | Osmond Max | Safety trip switch for mains supply - includes relay sensing potential different between mains earth and local earth to operate trip mechanisms |
| FR2504322A1 (en) * | 1981-04-15 | 1982-10-22 | Ferraz & Cie Lucien | SECURITY SYSTEM AGAINST TENSIONING OF METAL STRUCTURES |
| JPS6389017A (en) * | 1986-10-01 | 1988-04-20 | 株式会社日立製作所 | Earth leakage interrupter |
| JPS63251124A (en) * | 1987-04-02 | 1988-10-18 | Fanuc Ltd | Electric shock preventing device for wire cut electric discharge machining equipment |
| IT1231846B (en) * | 1989-09-14 | 1992-01-14 | Electrical Safety Company S R | ELECTRONIC SAFETY, ANTI-PULDING SYSTEM, FOR MACHINES AND ELECTRICAL SYSTEMS. |
| CN102195283B (en) * | 2010-03-03 | 2015-02-25 | 华为终端有限公司 | Terminal product and safety protection method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE613899C (en) * | 1930-01-15 | 1935-05-29 | Schiele & Bruchsaler Industrie | Circuit breaker with residual current coil |
| GB405614A (en) * | 1931-07-27 | 1934-01-29 | Gen Electric | Improvements in and relating to protective arrangements for electric apparatus |
| DE1159555B (en) * | 1962-03-30 | 1963-12-19 | Siemens Ag | Arrangement for protection against contact voltages on devices in electrical communications engineering |
| FR1457670A (en) * | 1965-09-23 | 1966-01-24 | Equip Thermique L | Voltage detector |
| FR1499450A (en) * | 1966-09-16 | 1967-10-27 | Const De Vaux Andigny Atel | Insulation fault protection device |
| AU7680374A (en) * | 1974-01-03 | 1976-06-24 | Selke H D | Electrical safety device |
| US4049976A (en) * | 1976-05-07 | 1977-09-20 | Pascente Joseph E | Solid-state voltage switching circuit |
| US4075510A (en) * | 1976-09-17 | 1978-02-21 | Pascente Joseph E | Thyristor voltage switching circuits |
| FR2382081A1 (en) * | 1977-02-28 | 1978-09-22 | Zaklady Wytworcze Aparatury Wy | Transformer with standing large short circuit currents - includes non-linear impedance in parallel with primary winding |
-
1979
- 1979-04-09 FR FR7908904A patent/FR2454206A1/en active Granted
-
1980
- 1980-04-01 NO NO800972A patent/NO800972L/en unknown
- 1980-04-04 EP EP80400460A patent/EP0018867A3/en not_active Withdrawn
- 1980-04-07 JP JP4474780A patent/JPS55141922A/en active Pending
- 1980-04-07 PT PT71065A patent/PT71065A/en unknown
- 1980-04-08 MX MX181874A patent/MX146857A/en unknown
- 1980-04-08 BR BR8002148A patent/BR8002148A/en unknown
- 1980-04-09 AR AR280618A patent/AR221933A1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| FR2454206B1 (en) | 1983-05-27 |
| JPS55141922A (en) | 1980-11-06 |
| PT71065A (en) | 1980-05-01 |
| FR2454206A1 (en) | 1980-11-07 |
| AR221933A1 (en) | 1981-03-31 |
| EP0018867A3 (en) | 1980-11-26 |
| BR8002148A (en) | 1980-11-25 |
| EP0018867A2 (en) | 1980-11-12 |
| MX146857A (en) | 1982-08-25 |
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