WO2006109330A1 - Procede de protection de connecteur electronique - Google Patents

Procede de protection de connecteur electronique Download PDF

Info

Publication number
WO2006109330A1
WO2006109330A1 PCT/IT2005/000206 IT2005000206W WO2006109330A1 WO 2006109330 A1 WO2006109330 A1 WO 2006109330A1 IT 2005000206 W IT2005000206 W IT 2005000206W WO 2006109330 A1 WO2006109330 A1 WO 2006109330A1
Authority
WO
WIPO (PCT)
Prior art keywords
connector
temperature
load
internal temperature
contacts
Prior art date
Application number
PCT/IT2005/000206
Other languages
English (en)
Inventor
Sandro Zandonella Balco
Salvatore Di Francesco
Original Assignee
Kem-O-Tek Italia Srl
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 Kem-O-Tek Italia Srl filed Critical Kem-O-Tek Italia Srl
Priority to PCT/IT2005/000206 priority Critical patent/WO2006109330A1/fr
Publication of WO2006109330A1 publication Critical patent/WO2006109330A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
    • H01R13/7137—Structural association with built-in electrical component with built-in switch the switch being a safety switch with thermal interrupter
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor

Definitions

  • the invention relates to a method for protecting an electrical connector and to an associated device.
  • the electrical power supply system inside a home or office is exposed to certain dangerous conditions which cannot be detected by ordinary protection systems such as fuses, magneto-thermal switches and/or differential switches.
  • a condition of this kind occurs when an electrical connector, for example the socket for connection to the mains power supply or the plug connected to a user appliance, has a contact resistance which is too high for the load current, this normally being due to oxidation or loosening of the terminals. Consequently, there is an increase in the temperature of the socket/plug system owing to the Joule effect.
  • the same condition may occur in the case of use of a branched socket (T-union) which is unsuitable or too small for the power to be used.
  • the object of the present invention is to provide a system for providing protection against these types of accidents.
  • This object is achieved by a method for protecting an electrical connector which can be powered by a source and can be connected to a load by means of contacts, characterized in that it comprises the step of detecting the internal temperature of said connector.
  • the invention also comprises an electrical connector which can be powered by a power supply source and can be connected to a load by means of contacts, characterized in that it comprises a protection device having at least one component sensitive to the internal temperature of the connector.
  • the electrical connector to which the invention applies may be equally well a male component (for example a plug) or a female component (for example a socket) and therefore when reference is made to only one component it is understood that the other one is not excluded. More generally the invention may be applied to all those types of connectors which have contact terminals.
  • an electromechanical circuit to be inserted inside a connector is used.
  • This electromechanical solution uses the thermally sensitive part of a magneto-thermal switch so that the temperature which causes deformation of a bimetallic strip is the temperature of the metal contacts of the connector.
  • An automatic switch actuated by a bimetallic temperature sensor or, more advantageously, by an electronic circuit may be inserted inside the connector.
  • This circuit which may be already present inside the socket for other functions, must be able to detect the temperature and/or signal danger and/or disconnect the power supply in the event of danger.
  • thermosensor for example a thermistor
  • a circuit which controls a switch in series with the load It is also possible to use a temperature sensor (for example a thermistor) connected to a circuit which controls a switch in series with the load.
  • the thermistor should be positioned as close as possible to the contacts of the connector, so as to measure the temperature thereof. It is possible to provide a thermal connection between the two contacts using a steatite strip which has a thermal resistance comparable to that of aluminium (usual metal for contacts) or use two thermistors, one for each contact.
  • An advantage of the invention is the simplicity with which it may be associated with the already existing active or passive protection system.
  • a temperature control system for implementing brown-out protection according to the invention may be incorporated very simply into any circuit, especially if the latter comprises a microprocessor.
  • An example is the electronic protection system of the Applicant and described in international patent application No. PCT/IT2004/000222.
  • this protection system an electronic circuit is already present inside an electrical plug for ensuring protection against dispersion currents and, by merely adding a thermistor and passive components to the circuit and providing suitable control by the microprocessor, it is possible to obtain the brown-out protection according to the present invention.
  • a variant of the invention includes the use of at least two temperature sensors, one situated on the contacts of the connector and the other at a distance therefrom and able to detect the temperature of the external environment.
  • Estimation of the heat generated may be performed by means of a suitable electronic circuit or advantageously by means of a microprocessor (or any equivalent processing unit) . Moreover, by determining (preferably via software) the derivative of the temperature currently present at the contacts and performing a predictive calculation it is possible to activate protection well in advance of the presence of a dangerous temperature at the contacts.
  • Fig. 1 shows a schematic diagram of the invention
  • Fig. 2 shows a schematic diagram of a first variant of the invention
  • Fig. 3 shows a schematic diagram of a second variant of the invention.
  • two leads 11a, lib from a power supply source 10 convey power, downstream of a switch 30, to an electrical socket 20 with contacts 22, 24.
  • a bimetallic temperature sensor 40 is present in the immediate vicinity of the contacts 22, 24, inside the socket 20. Said sensor 40 is sensitive to the temperature of the contacts 22, 24 and trips the switch 30 via a control device 50. When the temperature of the contacts 22, 24 exceeds a predefined limit (which in this case may be defined by the properties of the bimetallic strip) , the sensor 40 trips the switch 30 via the control device 50, opening it.
  • a predefined limit which in this case may be defined by the properties of the bimetallic strip
  • the control device 50 may be, for example, a mechanical actuating system which, following deformation of the sensor 30, releases a retaining pawl inside the switch 30, causing it to open.
  • the switch 30 may also be incorporated directly inside the socket 20.
  • two leads Ilia, 111b from a power supply source 110 convey power, downstream of a relay 160, to an electrical socket 120 with contacts 122, 124.
  • the relay 160 is excited by a -coil 162 controlled by an electronic circuit 170 which, via a line 172, receives data relating to the temperature of the contacts 122, 124.
  • Said temperature data is supplied by a temperature sensor 180 situated in the immediate vicinity of the contacts 122, 124.
  • a predefined limit which can be defined by a suitable parameter inside the circuit 170
  • said circuit 170 trips the relay 160, driving the coil 162, disconnects the socket 120 (and therefore the associated load, not shown) from the power supply 110.
  • the socket 120 comprises the circuit 170.
  • the sensor 180 is interrogated by the circuit 170 which is installed inside the socket 120 and is powered directly by the power supply source, via the leads 112a, 112b.
  • the socket 120 and the brown-out protection system according to the invention are inseparable, thereby increasing the safety.
  • the circuit 170 may be entirely analog or advantageously comprise a microprocessor for acquiring data from the sensor 180 and managing the relay 160.
  • the microprocessor is clearly also able to perform other functions, for example implement other types of active electrical protection. It is possible to provide, on the outside of the socket 120, acoustic and/or luminous signalling devices which are indicated overall by the reference number 200 and are driven by the circuit 170 and have the function of providing the user with a danger signal.
  • the circuit 170 may also be outside the socket 170, for example inside a centralized control device for a plurality of sockets 120.
  • the circuit 170 may be conveniently powered also by a battery or by solar cells so that it is independent of any external power supply, while all types of switches, including for example semiconductor switches, may be used instead of the relay 160. Both the relay 160 and the switches may be incorporated directly inside the socket 120.
  • Another sensor 190 for detecting the temperature of the external environment, may be arranged on the socket 120, far from the contacts 122, 124. By connecting the sensor 190 to the circuit 170, the latter is thus able to evaluate the difference in temperature between the contacts 122, 124 and the environment in order to determine the quantity of heat generated per unit of time by the Joule effect at the contacts 122, 124.
  • FIG. 3 A variant of the invention is shown in Fig. 3, where the reference numbers indicate components identical to those shown in Fig. 2.
  • the circuit 170 is now outside the socket 120 and receives temperature data from the sensor 180 via the line 172. In this way it is possible to obtain remote protection for the socket 120 or provide centralized protection for several sockets 120.
  • the line 172 may be a cable or any wireless (radio, infrared or other) connection.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

La présente invention décrit un procédé pour protéger un connecteur électrique qui peut être alimenté par une source d'alimentation électrique et relié à une charge par un moyen de contact. Ledit procédé passe par l'étape de détection de la température dans ledit connecteur. L'invention concerne également un connecteur pour mettre en place le procédé, caractérisé en ce qu'il comprend au moins un composant sensible à la température interne.
PCT/IT2005/000206 2005-04-13 2005-04-13 Procede de protection de connecteur electronique WO2006109330A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2005/000206 WO2006109330A1 (fr) 2005-04-13 2005-04-13 Procede de protection de connecteur electronique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2005/000206 WO2006109330A1 (fr) 2005-04-13 2005-04-13 Procede de protection de connecteur electronique

Publications (1)

Publication Number Publication Date
WO2006109330A1 true WO2006109330A1 (fr) 2006-10-19

Family

ID=35414770

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2005/000206 WO2006109330A1 (fr) 2005-04-13 2005-04-13 Procede de protection de connecteur electronique

Country Status (1)

Country Link
WO (1) WO2006109330A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008062283A2 (fr) * 2006-11-20 2008-05-29 Pircar S.R.L. Prise électrique avec interrupteur externe
FR2975232A1 (fr) * 2011-05-13 2012-11-16 Schneider Electric Ind Sas Dispositif permettant de signaler le couple de serrage d'une borne a vis
CN102929166A (zh) * 2012-10-29 2013-02-13 杭州凯特电器有限公司 基于温度的智能排插的控制方法及控制器
DE102012008489A1 (de) * 2011-12-15 2013-06-20 Diehl Ako Stiftung & Co. Kg Schaltbare Steckdose
WO2013113954A1 (fr) * 2012-02-03 2013-08-08 Inael Electrical Systems, S.A. Connecteur à capteurs monobloc et procédé de mesure et de correction faisant appel à ce dernier
DE102012107902A1 (de) * 2012-08-28 2014-03-06 Lapp Engineering & Co. Steckereinheit und elektrisches Gerät mit einer derartigen Steckereinheit
US9787083B2 (en) 2012-12-06 2017-10-10 Twin-Star International, Inc. Overheat-resistant power cord and method
WO2018188917A1 (fr) * 2017-04-10 2018-10-18 BSH Hausgeräte GmbH Appareil à connexion enfichable surveillée en température

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3918239A1 (de) * 1989-06-05 1990-12-06 Miele & Cie Sicherheitseinrichtung fuer elektrische haushaltgeraete
US5600306A (en) * 1994-10-17 1997-02-04 Nisso Industry Co., Ltd. Receptacle unit and extension cord
US6031703A (en) * 1997-02-10 2000-02-29 Schneider Electric Sa Protection relay and process
US20020097546A1 (en) * 2001-01-22 2002-07-25 Weinberger Pedro J. Safety electrical outlet with logic control circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3918239A1 (de) * 1989-06-05 1990-12-06 Miele & Cie Sicherheitseinrichtung fuer elektrische haushaltgeraete
US5600306A (en) * 1994-10-17 1997-02-04 Nisso Industry Co., Ltd. Receptacle unit and extension cord
US6031703A (en) * 1997-02-10 2000-02-29 Schneider Electric Sa Protection relay and process
US20020097546A1 (en) * 2001-01-22 2002-07-25 Weinberger Pedro J. Safety electrical outlet with logic control circuit

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008062283A3 (fr) * 2006-11-20 2008-11-13 Pircar S R L Prise électrique avec interrupteur externe
WO2008062283A2 (fr) * 2006-11-20 2008-05-29 Pircar S.R.L. Prise électrique avec interrupteur externe
FR2975232A1 (fr) * 2011-05-13 2012-11-16 Schneider Electric Ind Sas Dispositif permettant de signaler le couple de serrage d'une borne a vis
DE102012008489A1 (de) * 2011-12-15 2013-06-20 Diehl Ako Stiftung & Co. Kg Schaltbare Steckdose
WO2013113954A1 (fr) * 2012-02-03 2013-08-08 Inael Electrical Systems, S.A. Connecteur à capteurs monobloc et procédé de mesure et de correction faisant appel à ce dernier
EP2891214B1 (fr) * 2012-08-28 2022-02-16 Lapp Engineering AG Unité de fiche et appareil électrique doté d'une telle unité de fiche
DE102012107902A1 (de) * 2012-08-28 2014-03-06 Lapp Engineering & Co. Steckereinheit und elektrisches Gerät mit einer derartigen Steckereinheit
EP2891214A1 (fr) * 2012-08-28 2015-07-08 Lapp Engineering & Co. Unité de fiche et appareil électrique doté d'une telle unité de fiche
CN102929166A (zh) * 2012-10-29 2013-02-13 杭州凯特电器有限公司 基于温度的智能排插的控制方法及控制器
US9787083B2 (en) 2012-12-06 2017-10-10 Twin-Star International, Inc. Overheat-resistant power cord and method
WO2018188917A1 (fr) * 2017-04-10 2018-10-18 BSH Hausgeräte GmbH Appareil à connexion enfichable surveillée en température
CN110546841A (zh) * 2017-04-10 2019-12-06 Bsh家用电器有限公司 具有监视温度的插塞连接的器具
US10900846B2 (en) 2017-04-10 2021-01-26 Bsh Hausgeraete Gmbh Appliance having a temperature-monitored plug-in connection
CN110546841B (zh) * 2017-04-10 2021-07-30 Bsh家用电器有限公司 具有监视温度的插塞连接的器具

Similar Documents

Publication Publication Date Title
WO2006109330A1 (fr) Procede de protection de connecteur electronique
US20170077693A1 (en) System and apparatus for sensing temperature to prevent electrical fires
US5590010A (en) Heat responsive power interrupting device
US8139337B2 (en) Systems and methods for reducing electrically-caused fires in wiring devices
US5995350A (en) Temperature controlled circuit interrupter
US20100073839A1 (en) Systems and Methods for Detecting Unsafe Thermal Conditions in Wiring Devices
US9564719B1 (en) Elevated temperature detection and interrupter circuit for power cable
JP2002352635A (ja) 温度センサ付き電源コード
WO2015189572A1 (fr) Porte-fusible de coupe-circuit intelligent
WO2018002577A1 (fr) Alarme thermique intégrée dans une prise secteur
US11436905B2 (en) Socket fire alarm system
KR200445114Y1 (ko) 다수 센서와 연동되는 트립 연동단자를 내장한 누전 차단기
CN215461673U (zh) 一种灭火设备的反馈装置
JPS628419A (ja) 過熱防止装置付回路遮断器
KR102236763B1 (ko) 화재감응형 복합제어 전류공급기
GB2574115A (en) A warning system for an electrical wiring enclosure
CN113544810A (zh) 电路断路器和基于温度确定触点磨损的方法
JP2016195016A (ja) 端子接続不良検出装置
CN213071600U (zh) 一种可检测用电线路温度的86型插座
KR101989939B1 (ko) 인공지능 플러그
JP2019220275A (ja) 監視システム、及びコンセント
RU2794136C2 (ru) Электрическая сетевая вилка
CN210345912U (zh) 热水器
KR20110087757A (ko) 열전 소자를 이용한 무전원 열감시 장치
CN208283818U (zh) 电子温度控制器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

NENP Non-entry into the national phase

Ref country code: RU

WWW Wipo information: withdrawn in national office

Country of ref document: RU

122 Ep: pct application non-entry in european phase

Ref document number: 05743378

Country of ref document: EP

Kind code of ref document: A1