IT1263649B - Sistema di protezione di cavi ed apparecchi elettrici da guasti tendenti a provocare incendi mediante impiego di un conduttore di guardia per provocare l'intervento di interruttori differenziali ad alta sensibilita' - Google Patents

Sistema di protezione di cavi ed apparecchi elettrici da guasti tendenti a provocare incendi mediante impiego di un conduttore di guardia per provocare l'intervento di interruttori differenziali ad alta sensibilita'

Info

Publication number
IT1263649B
IT1263649B ITPD930072A ITPD930072A IT1263649B IT 1263649 B IT1263649 B IT 1263649B IT PD930072 A ITPD930072 A IT PD930072A IT PD930072 A ITPD930072 A IT PD930072A IT 1263649 B IT1263649 B IT 1263649B
Authority
IT
Italy
Prior art keywords
cause
intervention
guard conductor
high sensitivity
protection
Prior art date
Application number
ITPD930072A
Other languages
English (en)
Inventor
Clemente Possamai
Original Assignee
Clemente Possamai
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 Clemente Possamai filed Critical Clemente Possamai
Priority to ITPD930072A priority Critical patent/IT1263649B/it
Publication of ITPD930072A0 publication Critical patent/ITPD930072A0/it
Priority to EP94200735A priority patent/EP0617498A1/en
Publication of ITPD930072A1 publication Critical patent/ITPD930072A1/it
Application granted granted Critical
Publication of IT1263649B publication Critical patent/IT1263649B/it

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
    • H01B7/328—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks comprising violation sensing means
    • 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
    • H02H5/042—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 temperature dependent resistors
    • H02H5/043—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 temperature dependent resistors the temperature dependent resistor being disposed parallel to a heating wire, e.g. in a heating blanket
    • 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
    • H02H7/22—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 distribution gear, e.g. bus-bar systems; for switching devices
    • H02H7/226—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 distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
    • 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
    • H02H5/10—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 mechanical injury, e.g. rupture of line, breakage of earth connection

Landscapes

  • Insulated Conductors (AREA)
  • Breakers (AREA)
  • Cable Accessories (AREA)

Abstract

Per ridurre i rischi di incendio che possono verificarsi quando per usura almeno uno dei conduttori (42, 44) di un cavo di alimentazione perde la sua continuità consentendo un passaggio aleatorio di corrente che arrivi a provocare archi ripetuti (60) tendenti ad incendiare materiali elettricamente isolanti ma infiammabili, si impiega un conduttore di guardia (66), circondante i conduttori (42, 44) e collegabile alla presa di terra (32) prescritta per ogni impianto elettrico per provocare l'intervento di un interrutore differenziale (14) del tipo ad alta sensibilità per protezione da folgorazioni.In particolare, il conduttore di guardia (66) viene avvolto attorno alla coppia di conduttori formante il cavo di alimentazione ed è nella forma di un nastro piatto o una reticella in metallo (preferibilmente rame) per abbassare la temperatura di parti isolanti inizianti una combustione e contenere questo inizio di combustione nelle immediate vicinanze del guasto che l'ha provocato. Inoltre, il conduttore di guardia (66) viene collegato a terra attraverso un mezzo limitatore di corrente (70) per mantenere le correnti che si potessero formare verso la medesima a valori sufficienti a provocare l'intervento dell'interruttore differenziale ma a non provocare principi di incendi.
ITPD930072A 1993-03-26 1993-03-26 Sistema di protezione di cavi ed apparecchi elettrici da guasti tendenti a provocare incendi mediante impiego di un conduttore di guardia per provocare l'intervento di interruttori differenziali ad alta sensibilita' IT1263649B (it)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITPD930072A IT1263649B (it) 1993-03-26 1993-03-26 Sistema di protezione di cavi ed apparecchi elettrici da guasti tendenti a provocare incendi mediante impiego di un conduttore di guardia per provocare l'intervento di interruttori differenziali ad alta sensibilita'
EP94200735A EP0617498A1 (en) 1993-03-26 1994-03-23 Safety system for protecting cables and devices from fire producing faults through the use of a guard lead causing the tripping of highly sensitive differential circuit breakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPD930072A IT1263649B (it) 1993-03-26 1993-03-26 Sistema di protezione di cavi ed apparecchi elettrici da guasti tendenti a provocare incendi mediante impiego di un conduttore di guardia per provocare l'intervento di interruttori differenziali ad alta sensibilita'

Publications (3)

Publication Number Publication Date
ITPD930072A0 ITPD930072A0 (it) 1993-03-26
ITPD930072A1 ITPD930072A1 (it) 1994-09-26
IT1263649B true IT1263649B (it) 1996-08-27

Family

ID=11390261

Family Applications (1)

Application Number Title Priority Date Filing Date
ITPD930072A IT1263649B (it) 1993-03-26 1993-03-26 Sistema di protezione di cavi ed apparecchi elettrici da guasti tendenti a provocare incendi mediante impiego di un conduttore di guardia per provocare l'intervento di interruttori differenziali ad alta sensibilita'

Country Status (2)

Country Link
EP (1) EP0617498A1 (it)
IT (1) IT1263649B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503808A1 (de) * 1995-02-06 1996-08-08 Bayerische Motoren Werke Ag Sicherheitsvorrichtung für eine Stromleitung in Kraftfahrzeugen
DE19625752A1 (de) * 1996-06-27 1998-01-02 Andre Haake Elektrische Schalteinrichtung mit einer Ruhestromüberwachung
US6525914B1 (en) * 1999-05-26 2003-02-25 Technology Research Corporation Protection system for devices connected to an alternating current electrical power supply
DE10132752B4 (de) * 2001-07-10 2005-08-25 Daimlerchrysler Ag Verfahren und Vorrichtung zum Schutz eines Leiters bei Auftreten eines Lichtbogens
DE102020000289B4 (de) 2020-01-18 2023-06-01 WKS-Industrievertretungen und Unternehmensberatung Wolfgang Kaufmann Elektrisches System zur Erhöhung des Schutzes gegen elektrischen Stromschlag durch neue Sicherheitsanschlußleitungen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH371195A (de) * 1957-07-08 1963-08-15 Eisler Paul Elektrisches Widerstands-Heizelement mit einer elektrischen Schutzeinrichtung und Verfahren zu dessen Herstellung
DE1918419A1 (de) * 1969-04-11 1970-10-15 Stotz Kontakt Gmbh UEberwachungsanordnung fuer die elektrische Beheizung von Instrumenten,Leitungen u.dgl. in OElraffinerien
US3769549A (en) * 1972-08-07 1973-10-30 Gen Electric Electrical fire and shock protective apparatus
GB2047487B (en) * 1979-04-17 1983-04-20 Dreamland Electrical Appliance Heating circuits
DE2945842A1 (de) * 1979-11-09 1981-05-21 Siemens AG, 1000 Berlin und 8000 München Flexible elektrische leitung mit schutzeinrichtung
US4931894A (en) * 1989-09-29 1990-06-05 Technology Research Corporation Ground fault current interrupter circuit with arcing protection

Also Published As

Publication number Publication date
ITPD930072A0 (it) 1993-03-26
EP0617498A1 (en) 1994-09-28
ITPD930072A1 (it) 1994-09-26

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Legal Events

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0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19980327