EP0393182A1 - Dispositif de protection de resistances electriques de puissance et systeme anti-surpression. - Google Patents
Dispositif de protection de resistances electriques de puissance et systeme anti-surpression.Info
- Publication number
- EP0393182A1 EP0393182A1 EP89911572A EP89911572A EP0393182A1 EP 0393182 A1 EP0393182 A1 EP 0393182A1 EP 89911572 A EP89911572 A EP 89911572A EP 89911572 A EP89911572 A EP 89911572A EP 0393182 A1 EP0393182 A1 EP 0393182A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- enclosure
- valve
- parts
- resistors
- tube
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/024—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being hermetically sealed
- H01C1/026—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being hermetically sealed with gaseous or vacuum spacing between the resistive element and the housing or casing
Definitions
- the present invention relates to improvements made to metal enclosures intended to protect in a water and air tight manner electrical power resistors, more particularly intended to limit the amplitude of the fault currents, these resistors being installed. inside such enclosures containing exclusively air.
- resistors particularly intended for earthing, the role of which is to limit the amplitude of the fault currents for a time sufficient to allow the safety devices to operate, must be able to withstand currents of up to a thousand amps, and even more, for variable times from a few seconds to a few tens of seconds.
- the active elements of these resistors must be able to withstand voltages up to several tens of kilovolt during the circulation of the fault current. For this reason, it is constant to provide a protective enclosure for resistive elements with respect to the external environment providing, in addition, protection for personnel with regard to the voltage across the terminals of active elements resulting from the passage of a current. default.
- the most common type of enclosure does not provide any protection against dust or polluting particles of natural origin, such as, for example sand, or of industrial origin which are often finer and tend to settle on the insulators of fixing resistors inside said enclosures; the pollution phenomenon is further aggravated by the presence of large electrostatic charges, a consequence of the high voltages which the same insulators have to bear.
- the present invention aims to remedy such drawbacks by using airtight enclosures, not only to dust, but also to water jets, according to the IP 55 class of the French standard NFC-20010.
- said protective enclosures advantageously constituting the chassis supporting the active elements of the resistors, are produced from metallic plates of rectangular shape, assembled to constitute a parallelipipedic enclosure, comprising a roof, a bottom and four side panels; in such an economically advantageous construction, it is necessary to provide a seal for sealing the enclosure.
- a device for protecting electrical power resistors in particular suitable for earthing resistors assembled in a battery, by the conventional means of rods, insulating barrels and insulators inside d '' a parallelipipedic metal enclosure, impermeable to dust and water jets and enclosing only air for the cooling of said resistors, the device formed by four side panels, a bottom and a roof, assembled together by fixing screw, and provided with seals in all their assembly areas, so that the electrical continuity between two metal parts is achieved by said fixing screws, despite any loosening, characterized in that there is interposed between the two metal parts to be assembled, in line with the passages for the fixing screws of said parts, a compression element, such that it can produce on the opposite faces, a force greater than the stiffness of said parts and come to lodge in the thickness of an adequate cutout of the seal, ensuring the contact tightness of said parts, without limiting their effectiveness.
- a protection device for rectangular metal enclosures sealed against dust and water jets characterized in that the sealed enclosure is provided with an anti- overpressure, such as for example, a relief valve or any other equivalent means, limiting the risks of deformation of said enclosure, possibly causing leaks, or even rupture of the insulators.
- FIG. 1 is an exploded view giving a perspective diagram of the sealed parallelipiped enclosure according to the invention
- - Figure 2 is a partial sectional view and enlarged along the axis II 'of Figure 1, the mass continuity device by the fixing screws according to the invention, used in the assembly of the elements of the enclosure watertight in FIG. 1,
- FIG. 3 is an elevational view in vertical section of a variant of the device according to the invention, for the protection of the sealed enclosure of Figure 1 against internal overpressures due to the heating of the electrical resistances that she encloses,
- FIG. 4 is a variant of the above anti-overpressure device according to the invention, in the same view as FIG. 3,
- FIG. 5 is an elevational view in vertical section of another embodiment of the anti-overpressure system according to the invention.
- the enclosure 1 is intended for the protection of electrical resistances of powers 2 mounted in battery inside said enclosure, by means of insulators and insulating guns in a manner known ; enclosure 1 is not filled with any coolant for resistors 2 intended in principle to limit fault currents, which normally appear only briefly and for a very short time, creating an adiabatic heating situation .
- Enclosure 1 which must be sealed against dust and water jet, in accordance with class IP 55 of French standard NFC-20010, is constituted in a conventional manner by four metal side panels 3 planes, of shape rectangular and of sufficient thickness to ensure the mechanical function of supporting the batteries of resistance 2; these side panels 3 are mounted at right angles so that in combination with a roof 4 and a bottom 5, of shape and dimensions in relation to the side panels 3, the enclosure 1 has the general shape of a rectangular parallelepiped.
- Each side panel 3 has on the entire perimeter of the horizontal edges 6, and vertical 7, obtained by conventional folding; these edges 6, 7, in addition to their normal contribution to the mechanical rigidity of the panel, are advantageously used to receive the passages 8 of the fixing screws 9 and serve as bearing faces for the seals 10 arranged between successive panels 3, between panels 3 and the roof 4 or the bottom 5.
- the seals 10, made of a usual elastic material, are cut into longitudinal strips of width identical to the height of the edges 6 or 7 of the panels 3 and of thickness of the order a few millimeters in relation to the mass continuity device of the invention now described with reference to Figure 2 of the drawings.
- the seal 10 has a cutout 11 which is advantageously circular, with a diameter less than the width of said seal 10, to avoid any leakage in the seal, such as, inside the well formed by the cutout 11 of the seal 10, it is possible to completely accommodate, at least, an elastic washer 12, axially traversed by the threaded rod of the screw 9.
- the elastic washer 12 can be of any shape or material, provided that it acts in axial compression, during assembly by screws 8, by pushing the assembled faces together with a force greater than the stiffness of said faces. .
- the thickness of the seal 10 is such that the desired seal remains, even when there is a slight accidental loosening, due to vibrations of the enclosure for example, while the elastic washer 12, doing its job, pushes back the assembled faces; it will also be observed that the thickness of the same seal 10 is at least greater than the residual height of the washer 12 when it is fully compressed.
- washers 12 may be suitable for the device of the invention as the use of a helical spring or of frustoconical washers known under the commercial name of "Belleville” washers.
- the enclosure 1 is provided with an internal anti-overpressure device 13 making it possible, if necessary, to decompress the air prevailing inside the enclosure 1, the temperature of which could have risen following a long-term fault in the electrical network protected by the earthing resistor 2 located in the enclosure 1, the latter being, moreover, impermeable to dust and to the jet of water, as it was said.
- the roof 4 of the enclosure 1 is provided with a cutout 14, advantageously circular, to which a sealed connection is made, via 'A seal 15, a first part 16 of annular shape, of internal diameter equal to that of the cutout 14 of the roof 4.
- the part 16 has on its upper face 17, a circular and concentric groove 18, intended to receive an O-ring 19, the assembly constituting the seat of a movable element acting in the manner of a valve; for this purpose, a second part 20, in the shape of a disc, comes to rest normally on the O-ring 19, so as to obstruct, in a leaktight manner, the opening made at 14 on the roof 4 of the enclosure 1; the disc part 20, in a first variant of this embodiment, in accordance with FIG.
- a shouldered rod 21 secured to the part 20 in a known manner, and which can slide vertically and freely in the 'axis of the cutout 14;
- a perforated washer 22 can advantageously cooperate in guiding the rod 21, while putting the internal surface 201 of the part 20 in equipression with the ambient air inside the enclosure 1;
- the shouldered rod 21 is provided at its lower end, located inside the enclosure 1, with a first shoulder 211 ensuring the maintenance of a helical spring 23, centered in the axis of the valve by a second shoulder 212, arranged in compression on the internal surface of the roof 4, so that it recalls the moving element of the valve downwards, possibly in addition to the self-weight of the same element; it goes without saying that the stiffness K of the spring 23 is calculated so that, taking into account the weight of the moving parts, the internal pressure is limited to 0.2 bars.
- valve seat 16, 17, 18, 19 is the same as in the previous variant, and the disc piece 20 no longer has a shouldered rod 21 for guiding it axial; a first circular shoulder 26, advantageously provided with a chamfered nose 27, is attached to the internal face of the part 20, to which it is concentric; its diameter is slightly less than that of the opening 14 of the roof 4, so as to limit the horizontal displacements of the mobile assembly; in addition, a second shoulder 28 is provided on the external face of the closing part 20, to receive and center a helical spring 29, which, bearing on the internal face of the perforated protective cover 24, comes to constrain the closing part 20 on its seat 16, via the O-ring 19.
- FIG. 5 A second embodiment of the internal anti-overpressure device according to the invention is described with reference to FIG. 5; it is, essentially, a baffling with filtering allowing a permanent ventilation of the internal atmosphere prevailing inside enclosure 1, thus avoiding any internal overpressure, while respecting the sealing requirements of class IP 55 of the French standard NFC-20010.
- a first vertical tube 31 of sufficient height and of diameter equal to that of the opening 14 and a second tube 32 concentric with the first tube 31, substantially of the same height and of greater internal diameter, are secured to the enclosure 1, for example by welding, in line with the opening 14 so that, in cooperation, on the one hand with a removable cover 33 consisting of a disc 34 of where there are coaxially two concentric tubes 35, 36 of internal diameter such that for the smallest, it is between the diameters of the first and second tubes 31, 32 from the enclosure 1, and for the other it is greater than diameter of the second tube 32 coming from the enclosure 1, and of height substantially equal to said tubes 31, 32 so that said cover 33 comes to cover the opening 14 by coaxially fitting the tubes 35, 36, and on the other hand, in cooperation with a filter element 37 arranged p ar example at the upper end of the first tube 31 from the enclosure 1, adequate vertical wedges 38, 39 between the tubes 31, 32, 35, 36 provided with fixing screws 40, the assembly forms an anti-baffle overpressure
- each spacer 38 comprises a threaded end rod 40, allowing the clamping of the cover 33, by a nut 401, on a shoulder 402 of the spacer 38.
- the filter element 37 consists of a filter whose fineness of sieving is adapted to the type of pollution from which one wishes to protect, essentially having an upper orifice 370 provided at the periphery with a horizontal flange 371 coming from rest on the upper edge of the innermost tube 31 of the baffle.
- An annular spacer 39 is disposed on the flange 371 of the filter element 37 to serve as a spacer for the cover 33 and for blocking said element 37.
- Lights 391 alternate radially with solid parts 392 to create the entrance to the baffle.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Safety Valves (AREA)
- Gasket Seals (AREA)
- Casings For Electric Apparatus (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89911572T ATE100626T1 (de) | 1988-10-03 | 1989-10-03 | Schutzanordnung fuer elektrische leistungswiderstaende und anti-ueberdrucksystem. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR888812913A FR2637412B1 (fr) | 1988-10-03 | 1988-10-03 | Dispositif de protection de resistances electriques de puissance et systeme antisurpression |
FR8812913 | 1988-10-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0393182A1 true EP0393182A1 (fr) | 1990-10-24 |
EP0393182B1 EP0393182B1 (fr) | 1994-01-19 |
Family
ID=9370628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89911572A Expired - Lifetime EP0393182B1 (fr) | 1988-10-03 | 1989-10-03 | Dispositif de protection de resistances electriques de puissance et systeme anti-surpression |
Country Status (5)
Country | Link |
---|---|
US (1) | US5077536A (fr) |
EP (1) | EP0393182B1 (fr) |
DE (1) | DE68912572T2 (fr) |
FR (1) | FR2637412B1 (fr) |
WO (1) | WO1990004257A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6273426B1 (en) * | 1999-07-22 | 2001-08-14 | Avaya Technology Corp. | Hydrodynamic seal and a method for providing the same |
US7002084B2 (en) * | 2002-01-16 | 2006-02-21 | Weightech, Inc. | Modular sealed portable digital electronic controller |
US20080230282A1 (en) * | 2005-08-05 | 2008-09-25 | Weightech, Inc. | Modular sealed portable digital electronic controller |
US7710714B2 (en) * | 2004-09-13 | 2010-05-04 | Bettcher Industries, Inc. | Housing for scale or load cell controller |
CN114420394B (zh) * | 2022-02-28 | 2023-01-24 | 淮安市泽邦电子有限公司 | 一种高压电阻防护装置及其防护方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR71889E (fr) * | 1955-07-05 | 1960-02-01 | Forges Ateliers Const Electr | Perfectionnements aux rhéostats |
DE1540418B2 (de) * | 1965-05-19 | 1972-01-27 | Siemens AG, 1000 Berlin u 8000 München | Fremdbelueftetes widerstandsgeraet |
GB1354662A (en) * | 1972-10-20 | 1974-06-05 | Elektriska Ab Eletta | High voltage assembly for use in electrostatic surface coating operations |
FR2423954A1 (fr) * | 1978-04-21 | 1979-11-16 | Cem Comp Electro Mec | Enceinte etanche en resine moulee avec membrane de securite, notamment pour appareils electriques |
-
1988
- 1988-10-03 FR FR888812913A patent/FR2637412B1/fr not_active Expired - Lifetime
-
1989
- 1989-10-03 US US07/499,328 patent/US5077536A/en not_active Expired - Fee Related
- 1989-10-03 EP EP89911572A patent/EP0393182B1/fr not_active Expired - Lifetime
- 1989-10-03 WO PCT/FR1989/000511 patent/WO1990004257A1/fr active IP Right Grant
- 1989-10-03 DE DE68912572T patent/DE68912572T2/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9004257A1 * |
Also Published As
Publication number | Publication date |
---|---|
US5077536A (en) | 1991-12-31 |
DE68912572D1 (de) | 1994-03-03 |
EP0393182B1 (fr) | 1994-01-19 |
DE68912572T2 (de) | 1994-08-25 |
WO1990004257A1 (fr) | 1990-04-19 |
FR2637412A1 (fr) | 1990-04-06 |
FR2637412B1 (fr) | 1990-11-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2611221C (fr) | Dispositif de prevention contre l'explosion d'un transformateur electrique | |
EP2383760B1 (fr) | Système à clapet pour chambre de coupure, et disjoncteur le comprenant | |
EP0393182B1 (fr) | Dispositif de protection de resistances electriques de puissance et systeme anti-surpression | |
FR2574589A1 (fr) | Dispositif de mise en court-circuit exterieur de faible encombrement | |
EP0244281B1 (fr) | Condensateur basse tension autoprotégé | |
CA2054509C (fr) | Interrupteur rotatif multipolaire | |
EP3039757B1 (fr) | Dispositif de confinement des fuites de gaz se produisant au niveau d'un disque de rupture d'un compartiment d'un poste electrique ou d'un disjoncteur a haute tension a isolation gazeuse | |
CA1263162A (fr) | Boitier de dispositif electrique, notamment de parafoudre, incluant une enveloppe isolante moulee | |
FR2891955A1 (fr) | Tableau de distribution d'ernergie electrique | |
CH687839A5 (fr) | Chambre de coupure de disjoncteur haute tension. | |
FR2674064A1 (fr) | Dispositif de varistance et de resistance pour la chambre de coupure d'un disjoncteur. | |
EP1267367A1 (fr) | Bac de sécurité pour la rétention de fluides diélectriques dans un poste de transformation et de distribution moyenne tension, et poste comportant un tel bac | |
CA1125426A (fr) | Dispositif pour creer une decharge electrique dans une ligne electrique plate | |
CA2091321C (fr) | Contact a inertie | |
FR2629263A1 (fr) | Dispositif de protection pour appareil electrique a moyenne tension | |
EP1018756B1 (fr) | Dispositif de coupure électrique pour moyenne et haute tension | |
EP4343808A1 (fr) | Dispositif non-électrique pour la substitution d'un capteur de courant dans une chambre de coupure d'un interrupteur-sectionneur, ainsi qu interrupteur-sectionneur comportant un tel dispositif non-électrique | |
FR2589015A1 (fr) | Parafoudre pour l'ecoulement de courants forts en reponse a des signaux rapides | |
EP0233592A1 (fr) | Disjoncteur à haute tension à gaz d'extinction sous pression | |
FR2897990A1 (fr) | Dispositif de protection contre les surtensions de construction simplifiee et de fiabilite accrue | |
WO2022112728A1 (fr) | Borne anti-deflagration pour terminaison exterieure a haute tension | |
WO2014111445A1 (fr) | Emballage pour le transport et/ou l'entreposage de matieres radioactives comprenant une protection anti-feu amelioree | |
FR3098008A1 (fr) | Appareil électrique de commutation comportant un dispositif de filtrage | |
FR2971373A1 (fr) | Dispositif de decharge de pression pour un appareillage electrique haute ou moyenne tension de type gis, dead ou live tank | |
FR2924278A1 (fr) | Dispositif de protection de lignes telephoniques |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19901009 |
|
17Q | First examination report despatched |
Effective date: 19930208 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
REF | Corresponds to: |
Ref document number: 100626 Country of ref document: AT Date of ref document: 19940215 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 68912572 Country of ref document: DE Date of ref document: 19940303 |
|
ITF | It: translation for a ep patent filed |
Owner name: DOTT. GIOVANNI LECCE & C. |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19940419 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
EAL | Se: european patent in force in sweden |
Ref document number: 89911572.9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19951001 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19951020 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19951024 Year of fee payment: 7 Ref country code: AT Payment date: 19951024 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19951025 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19951106 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19961003 Ref country code: AT Effective date: 19961003 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19961004 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19961024 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19961029 Year of fee payment: 8 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19961031 Ref country code: CH Effective date: 19961031 Ref country code: BE Effective date: 19961031 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19961230 Year of fee payment: 8 |
|
BERE | Be: lapsed |
Owner name: LE METAL DEPLOYE Effective date: 19961031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19970501 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19970501 |
|
EUG | Se: european patent has lapsed |
Ref document number: 89911572.9 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19971003 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19971031 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19971003 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980701 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051003 |