ITSI20090001A1 - GENERATOR LINE PROTECTION - Google Patents

GENERATOR LINE PROTECTION Download PDF

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Publication number
ITSI20090001A1
ITSI20090001A1 IT000001A ITSI20090001A ITSI20090001A1 IT SI20090001 A1 ITSI20090001 A1 IT SI20090001A1 IT 000001 A IT000001 A IT 000001A IT SI20090001 A ITSI20090001 A IT SI20090001A IT SI20090001 A1 ITSI20090001 A1 IT SI20090001A1
Authority
IT
Italy
Prior art keywords
protection
line
differential
board
generator
Prior art date
Application number
IT000001A
Other languages
Italian (it)
Inventor
Antonio Matarazzo
Original Assignee
Antonio Matarazzo
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 Antonio Matarazzo filed Critical Antonio Matarazzo
Priority to ITSI2009A000001A priority Critical patent/IT1403395B1/en
Publication of ITSI20090001A1 publication Critical patent/ITSI20090001A1/en
Application granted granted Critical
Publication of IT1403395B1 publication Critical patent/IT1403395B1/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/14Emergency 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16Emergency 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 fault current to earth, frame or mass
    • H02H3/167Emergency 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 fault current to earth, frame or mass combined with other earth-fault protective arrangements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26Emergency 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
    • H02H3/32Emergency 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
    • H02H3/33Emergency 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
    • H02H3/331Emergency 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 responsive to earthing of the neutral conductor

Description

: " PROTEZIONE LINEA GENERATORE : "GENERATOR LINE PROTECTION

DESCRIZIONE DESCRIPTION

Il progetto, ha lo scopo di proteggere l'utente da eventuali dispersioni che si possono verificare, sulla linea di alimentazione della rete 220Vac monofase o 380 Vac trifase, a bordo delle imbarcazioni quando tale alimentazione à ̈ generata da un generatore di bordo e, non viene quindi utilizzata l'alimentazione fornita dalia banchina di terra del pontile. L'inconveniente che si presenta nella sopra citata condizione à ̈ la mancanza di intervento del sistema differenziale di bordo, definii o "salvavita", a causa della mancanza di un riferimento reale di messa a terra che permetta ,come nel normale funzionamento con il riferimento da banchina, una analisi e quindi il monitoraggio della corrente che fluisce all'interno del sistema stesso. Infatti una reale dispersione su di uno chassis di un utilizzatore di bordo, come può essere uno scaldabagno, un forno elettrico o qualsiasi altro utilizzatore elettrico alimentato con rete 220 Vac, in questo caso non verrebbe in alcun modo avvertita dalle protezioni, con conseguenze letali per il corpo umano. Il circuito proposto invece analizza costantemente la linea di terra esistente a bordo e, nel caso in cui ci dovesse essere una presenza di dispersione su di essa, il circuito la elaborerebbe come un segnale che, manipolato elettronicamente, creerebbe una chiusura di corto circuito fra fase e neutro della linea, con il conseguente intervento del sistema magnetotermico, interrompendo così l'erogazione delia linea a bordo, che potrà essere riattivata solo a guasto riparato.Questo sistema quindi si diversifica dal concetto di intervento differenziale ed opera quindi solo per monitoraggio linea di terra. Nello schema di fig. 1 viene indicato un diagramma a blocchi per poter meglio comprendere le varie fasi del monitoraggio c quindi successivamente dell'utilizzo dei segnale. 1 o schema viene riportato in copia nel Prospetto Modulo A paragr. P. Lo schema circuitale vero e proprio à ̈ già stato sviluppato ed avrà delle diversificazioni a secondo del tipo di rete che andremo a monit orare , Grazie al suo modo di intervento, può essere applicato a tutti i mezzi che hanno la necessita' di avere una doppia alimentazione sia da terra, per dove à ̈ richiesto l'intervento differenziale di protezione, sia da bordo, generata da dispositivi propri, condizione nella quale non interviene il differenziale. In pratico i particolari di esecuzione potranno comunque variare senza uscire nell'ambito del trovalo e quindi dal dominio del brevetto di invenzione. The project aims to protect the user from any leaks that may occur, on the power line of the 220Vac single-phase or 380 Vac three-phase network, on board the boats when this power is generated by an on-board generator and, not the power supplied by the land quay of the wharf is then used. The drawback that occurs in the aforementioned condition is the lack of intervention of the on-board differential system, defined or "lifesaving", due to the lack of a real earth reference that allows, as in normal operation with the reference from the quay, an analysis and therefore the monitoring of the current flowing inside the system itself. In fact, a real dispersion on a chassis of an on-board user, such as a water heater, an electric oven or any other electric user powered by 220 Vac mains, in this case would not be in any way warned by the protections, with lethal consequences for the human body. The proposed circuit, on the other hand, constantly analyzes the earth line existing on board and, in the event that there should be a presence of dispersion on it, the circuit would process it as a signal which, electronically manipulated, would create a short circuit closure between phases. and neutral of the line, with the consequent intervention of the magnetothermic system, thus interrupting the supply of the on-board line, which can be reactivated only when the fault is repaired.This system therefore differs from the concept of differential intervention and therefore operates only for line monitoring of land. In the diagram of fig. 1 shows a block diagram in order to better understand the various phases of monitoring and therefore subsequently of the use of the signal. 1 or diagram is copied in the Prospectus Form A par. P. The actual circuit diagram has already been developed and will have diversifications according to the type of network we are going to monitor, Thanks to its mode of intervention, it can be applied to all means that need to have a double power supply both from the ground, where the differential protection intervention is required, and from the board, generated by its own devices, a condition in which the differential does not intervene. In practice, the details of execution may in any case vary without departing from the scope of the finding and therefore from the domain of the invention patent.

Claims (2)

RIVENDICAZIONI 1) Sistema di protezione linea generatore, caratterizzata da fatto che interviene nonostante la mancanza di un reale riferimento di terra necessario per la proiezione differenziale. CLAIMS 1) Generator line protection system, characterized by the fact that it intervenes despite the lack of a real earth reference necessary for the differential projection. 2) Circuito elettronico secondo la rivendicazione 1), caratterizzato dal suo modo di intervento : Il sistema si rende innovativo per il suo utilizzo in quanto permette di far iniervenire una protezione elettronica sulla linea quando, l'imbarcazione à ̈ alimentata dal gruppo elettrogeno di bordo, nel caso in cui si presentino dispersioni sugli utilizzatori (Boiler, piastre elettriche, Tutti gli utilizzatori che hanno come protezione il riferimento di terra). Il tutto à ̈ possibile grazie ad un continuo monitoraggio della linea di terra di bordo effettuata dal circuito stesso. Esistono degli accorgimenti che comunque potrebbero ovviare a tale problema, ma che non possono comunque interagire con i sistemi dì protezione differenziale, perché, tali sistemi, richiedendo delle modifiche circuitali , renderebbero inapplicabili i concetti di controllo differenziale, che per normativa dì sicurezza devono essere presenti in un impianto elettrico.2) Electronic circuit according to claim 1), characterized by its intervention mode: The system is innovative for its use as it allows an electronic protection to be activated on the line when the boat is powered by the on-board generator, in the event that there are losses on the users (Boiler, electric plates, All users whose protection is the earth reference). All this is possible thanks to a continuous monitoring of the on-board earth line carried out by the circuit itself. There are some precautions that could in any case overcome this problem, but which cannot in any case interact with the differential protection systems, because, by requiring circuit modifications, these systems would make the concepts of differential control inapplicable, which by safety regulations they must be present in an electrical system.
ITSI2009A000001A 2009-02-03 2009-02-03 GENERATOR LINE PROTECTION IT1403395B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ITSI2009A000001A IT1403395B1 (en) 2009-02-03 2009-02-03 GENERATOR LINE PROTECTION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITSI2009A000001A IT1403395B1 (en) 2009-02-03 2009-02-03 GENERATOR LINE PROTECTION

Publications (2)

Publication Number Publication Date
ITSI20090001A1 true ITSI20090001A1 (en) 2010-08-04
IT1403395B1 IT1403395B1 (en) 2013-10-17

Family

ID=40983518

Family Applications (1)

Application Number Title Priority Date Filing Date
ITSI2009A000001A IT1403395B1 (en) 2009-02-03 2009-02-03 GENERATOR LINE PROTECTION

Country Status (1)

Country Link
IT (1) IT1403395B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0266883A1 (en) * 1986-10-03 1988-05-11 Hunting Communication Technology Limited Detection of unsafe voltages on mobile equipment
WO1997036358A1 (en) * 1996-03-28 1997-10-02 Hayim Nevo Safety adapter for ungrounded electrical socket
WO2008145600A1 (en) * 2007-06-01 2008-12-04 Kem-O-Tek Italia Srl Circuit for protection against the risk of electric shocks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0266883A1 (en) * 1986-10-03 1988-05-11 Hunting Communication Technology Limited Detection of unsafe voltages on mobile equipment
WO1997036358A1 (en) * 1996-03-28 1997-10-02 Hayim Nevo Safety adapter for ungrounded electrical socket
WO2008145600A1 (en) * 2007-06-01 2008-12-04 Kem-O-Tek Italia Srl Circuit for protection against the risk of electric shocks

Also Published As

Publication number Publication date
IT1403395B1 (en) 2013-10-17

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