EP0995253A1 - Electric installation protecting means - Google Patents

Electric installation protecting means

Info

Publication number
EP0995253A1
EP0995253A1 EP97930725A EP97930725A EP0995253A1 EP 0995253 A1 EP0995253 A1 EP 0995253A1 EP 97930725 A EP97930725 A EP 97930725A EP 97930725 A EP97930725 A EP 97930725A EP 0995253 A1 EP0995253 A1 EP 0995253A1
Authority
EP
European Patent Office
Prior art keywords
terminals
electric installation
electric
zero
protective
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.)
Withdrawn
Application number
EP97930725A
Other languages
German (de)
French (fr)
Other versions
EP0995253A4 (en
Inventor
Aram Dekel
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0995253A1 publication Critical patent/EP0995253A1/en
Publication of EP0995253A4 publication Critical patent/EP0995253A4/en
Withdrawn legal-status Critical Current

Links

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
    • H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/334—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch

Definitions

  • the present invention relates to a protective arrangement for inclusion in an electric installation system, especially the new arrangement is designed to prevent the cause of fire or damage to the installation due to the sudden electrical failure or rise of temperature in the vicinity of the assembly of integers constituting the arrangement.
  • the existing protective means designed for inclusion in conventional electric installations are targeted to prevent harm to civilization by electrification.
  • the conventional means do not consider at all the likelihood of damage to goods and/or premises caused by a short and likely thereby caused spark, or rise of temperature.
  • the heating up of electric wires is a common phenomenon and the consequences are well known and need no further elaboration.
  • the new protective arrangement construction is based on the recognition that harm could be prevented if, whenever the temperature rises within or at the vicinity of the new protective means, the new means would be actuated and disconnects the whole circuit from the grid. Scope of Invention
  • This object is obtained by inclusion into a constitutive portion of the respective electric system, a new component which is assigned to short circuit between "phase” and “zero” or “earth” whenever the temperature rises to a predetermined level.
  • the new arrangement relates to component such as bimetallic make and break or thermic fuse or switch and the like members of generally known type destined for different purposes.
  • Such a device could be included e.g., into a wall socket by fixedly connecting its two terminals to the "earth” and “zero” or “zero” and “phase” or “phase and earth” etc., terminals of such a wall socket.
  • Figure 1 is a schematic, perspective view of a conventional bi-metallic make - and break device.
  • Figure 2 being a frontal view thereof.
  • Figure 3 illustrates in a schematical manner the function of the device of Figures 1 and 2.
  • Figure 4 illustrates diagramatically by way of example an electric installation comprising a socket in which the new means is inserted.
  • the generally know bi-metallic make and break device comprises a box shaped casing 10 from which extend two terminal wires 11.
  • the casing includes two terminals 11' and 11" of metals of different heat expansion coefficient.
  • the terminals 11' and 11 snap towards each other the contact is closed.
  • the outlay of an electric installation comprising a main conduit 1 leading from the respective grid and feeding the systems which includes a main switch 2, making or breaking contact via a leakage relay 3 with a consumer switch 4 and a consumer line 5 leading to an electric implement, e.g. a wall socket 6.
  • a main switch 2 making or breaking contact via a leakage relay 3 with a consumer switch 4 and a consumer line 5 leading to an electric implement, e.g. a wall socket 6.
  • an electric implement e.g. a wall socket 6.
  • the bi-metallic component 7 of Figure 3 comprising the terminals 11' and 11". Terminals 11' and 11" are connected according to the example to the "earth" and "zero" terminals of wall socket 6 respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

A protective arrangement (10) for inclusion in an electric installation system designed to prevent the cause of fire or damage to the installation due to the sudden electrical failure or rise of temperature in the vicinity of the system. A component short circuits between phase and zero or earth whenever the temperature rises to a predetermined level.

Description

ELECTRIC INSTALLATION PROTECTING MEANS
Field and Background of Invention
The present invention relates to a protective arrangement for inclusion in an electric installation system, especially the new arrangement is designed to prevent the cause of fire or damage to the installation due to the sudden electrical failure or rise of temperature in the vicinity of the assembly of integers constituting the arrangement.
The existing protective means designed for inclusion in conventional electric installations are targeted to prevent harm to humanity by electrification. The conventional means do not consider at all the likelihood of damage to goods and/or premises caused by a short and likely thereby caused spark, or rise of temperature. The heating up of electric wires is a common phenomenon and the consequences are well known and need no further elaboration.
The new protective arrangement construction is based on the recognition that harm could be prevented if, whenever the temperature rises within or at the vicinity of the new protective means, the new means would be actuated and disconnects the whole circuit from the grid. Scope of Invention
This object, according to the invention is obtained by inclusion into a constitutive portion of the respective electric system, a new component which is assigned to short circuit between "phase" and "zero" or "earth" whenever the temperature rises to a predetermined level.
According to the invention the new arrangement, relates to component such as bimetallic make and break or thermic fuse or switch and the like members of generally known type destined for different purposes.
Such a device could be included e.g., into a wall socket by fixedly connecting its two terminals to the "earth" and "zero" or "zero" and "phase" or "phase and earth" etc., terminals of such a wall socket.
It is also within the scope of the invention to include said component or device within the electric plug.
As stated above a large number of components could be used for utilizing the invention in the following description, reference is made by example to a bimetallic made and break device. Short Description of Drawings
The invention will now be described in detail with reference to the accompanying drawings thereof:
Figure 1 is a schematic, perspective view of a conventional bi-metallic make - and break device.
Figure 2 being a frontal view thereof.
Figure 3 illustrates in a schematical manner the function of the device of Figures 1 and 2.
Figure 4 illustrates diagramatically by way of example an electric installation comprising a socket in which the new means is inserted.
Description of Preferred Embodiment
Turning first to Figures 1 and 2 the generally know bi-metallic make and break device comprises a box shaped casing 10 from which extend two terminal wires 11. As shown in Figure 3 the casing includes two terminals 11' and 11" of metals of different heat expansion coefficient. At normal flow of current terminals 11' and 11" are distant from each other, i.e. the contact if "open". At rise of temperature in whatever part of the system the terminals 11' and 11 " snap towards each other the contact is closed. In the example of Figure 4 the outlay of an electric installation is shown, comprising a main conduit 1 leading from the respective grid and feeding the systems which includes a main switch 2, making or breaking contact via a leakage relay 3 with a consumer switch 4 and a consumer line 5 leading to an electric implement, e.g. a wall socket 6. Into the latter is inserted the bi-metallic component 7 of Figure 3 comprising the terminals 11' and 11". Terminals 11' and 11" are connected according to the example to the "earth" and "zero" terminals of wall socket 6 respectively.
At normal flow of current there is no contact between "earth" and "zero" terminals of sockets 6 in case - however - of a rise of temperature at socket 6 the bi-metallic implement 10 establishes a short circuit 11' - 11" actuation the leakage relay 3, i.e., the whole consumer installation, from the main line 1.
It is quite obvious that the device could be installed also between any other two terminals.
Those skilled in the art will see that in every system comprising a leakage relay intermediate a main line from the grid and a consumer line can be protected be including the new means in whatever consumer outlet.
Whereas by way of examples of use of the new safety means has been described in connection with a wall socket, it is obvious that such a means could equally be included in different implement, e.g., coupler sockets (popularly also called "receptacles") or coupler plugs, lamp housing, and the like.

Claims

1. A protective means for electric installation comprising as a component of the respective electric system a heat sensitive component.
2. A protective means as claimed in claim 1 characterized thereby that said means being a bi-metallic make and break switch.
3. A protective means as claimed in claim 1 characterized thereby that said means being a thermic fuse.
4. A protective means as claimed in claim 1 characterized thereby that said means being a thermic switch.
5. An electric installation system according to claim 1 wherein a wall socket is included the "earth", "zero" and "phase" terminals of which are connected to two terminals of the protection means as claimed in claim 1.
6. An electric installation system according to claim 1 comprising a complex socket or a complex plug two terminals thereof are respectively connected to two terminals of the said means as claimed in claim 1.
EP97930725A 1997-07-17 1997-07-17 Electric installation protecting means Withdrawn EP0995253A4 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IL1997/000244 WO1999004474A1 (en) 1997-07-17 1997-07-17 Electric installation protecting means

Publications (2)

Publication Number Publication Date
EP0995253A1 true EP0995253A1 (en) 2000-04-26
EP0995253A4 EP0995253A4 (en) 2003-04-16

Family

ID=11062009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97930725A Withdrawn EP0995253A4 (en) 1997-07-17 1997-07-17 Electric installation protecting means

Country Status (6)

Country Link
EP (1) EP0995253A4 (en)
JP (1) JP2001510979A (en)
KR (1) KR20010021873A (en)
AU (1) AU757921B2 (en)
CA (1) CA2295668A1 (en)
WO (1) WO1999004474A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2609452A1 (en) * 2005-05-25 2006-11-30 Callsmart Uk Limited Thermal protection for electrical installations and fittings
GB2471869B (en) 2009-07-15 2012-04-25 Vishay Resistors Belgium Bvba Thermal switch

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872355A (en) * 1973-09-18 1975-03-18 Gen Electric Fire detection and projection circuit and device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3033323A1 (en) * 1979-09-11 1981-03-26 Rohm Co. Ltd., Kyoto PROTECTIVE DEVICE FOR A SEMICONDUCTOR DEVICE
US4618906A (en) * 1984-07-16 1986-10-21 Westinghouse Electric Corp. Hybrid solid state/mechanical switch with failure protection
US4858054A (en) * 1985-05-07 1989-08-15 Franklin Frederick F Protective circuits and devices for the prevention of fires
DE8806648U1 (en) * 1988-05-20 1989-06-22 Hofsaess, Peter, 7530 Pforzheim, De
US5590010A (en) * 1994-07-12 1996-12-31 Ceola; Giacomo Heat responsive power interrupting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872355A (en) * 1973-09-18 1975-03-18 Gen Electric Fire detection and projection circuit and device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9904474A1 *

Also Published As

Publication number Publication date
EP0995253A4 (en) 2003-04-16
KR20010021873A (en) 2001-03-15
CA2295668A1 (en) 1999-01-28
WO1999004474A1 (en) 1999-01-28
JP2001510979A (en) 2001-08-07
AU757921B2 (en) 2003-03-13
AU3458297A (en) 1999-02-10

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