SD Dojavi Slobodna Dalmacija
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Prije pet godina svoju staru jedrilicu zamijenio sam većom i držim je privezanu u lučici na jednom našem otoku. Do sada nisam imao ovaj problem, ali na ovoj novoj mi se instrumenti često kvare, ili, kako serviser dobavljača kaže, pregore. Svaki put me uvjerava da je kvar posljedica udara groma i da se to ne može popravljati nego da kupim novi. Nije mi jasno kako je moguće da do sada nisam imao taj problem, a u zadnjih pet godina ovo se dogodilo već tri puta. Molim vaše mišljenje.

Ivica P., Velika Gorica

Kvarovi nastali kao posljedica groma tretiraju se kao prirodni ili vanjski uzroci i nisu pokriveni garancijom od proizvođača. Udarom groma dolazi do snažnog visokonaponskog pražnjenja, ali koje ipak s udaljenošću od mjesta udara dosta slabi. Tako i nastala šteta ne mora biti posljedica direktnog udara groma u plovilo već je dovoljno da udari u njegovoj blizini, jer snažno električno pražnjenje djeluje na sve vodiče, pa tako i na električne instalacije i komponente u uređajima na plovilu.

Naknadni kvar

Ponekad se takvi kvarovi na uređajima i ne pokažu odmah, već naknadno tijekom korištenja, jer ga grom nije uništio nego je samo oslabio neke elemente uređaja, a njihovim nepravilnim radom uređaj pregori tek naknadno. Osiguravatelji takva oštećenja, pa i ona naknadna, a za koja se dokaže da su posljedica groma, priznaje u cijelosti.

Apsolutna zaštita od groma ne postoji, a putanja munje je nepredvidiva, međutim, činjenica je da neke mikrolokacije gromove privlače više od drugih. Poznato je da su vulkanske stijene otočića Jabuke pune željeza, pa za vrijeme nevremena privlače gromove koji tuku direktno u otok. Sjećam se i problema koji su početkom devedesetih godina imali stanovnici jednog dijela Solina.

U to se vrijeme započelo s prelaskom analognih telefona na digitalne, a nakon svakog grmljavinskog nevremena veliki broj digitalnih telefona s tog područja se kvario. Proizvođač nije priznavao garanciju, jer su kvarove pripisivali vanjskom uzroku, gromu.

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image
Električni sklopovi su osjetljivi
Božidar Vukičević/Ilustracija/Cropix
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Neke indicije govore kako se jedna takva lokacija odnedavno možda pojavila i u splitskoj luci, točnije, ispod Banovine. Naime, nakon što je od željeza izrađena skulptura Ruža vjetrova premještena niti pedesetak metara dalje, njoj najbliža plovila privezana uz obalu učestalo imaju štete nastale kao posljedica udara groma.

Nova pozicija

Zadnja takva bila je u rujnu prošle godine, i to na četiri najbliža velika sofisticirana katamarana na jedra. Onom najbližem uništena je kompletna elektronika, sva električna vitla i uređaji, pa i svi setovi akumulatora, a ukupna šteta dosegnula je vrijednost od više stotina tisuća kuna. Na ostala tri katamarana oštećenja su bila manja, uglavnom su stradali navigacijski instrumenti, ali i na njima se visina štete mjeri u stotinama tisuća kuna.

Zanimljivo je kako se ranije, dok je skulptura bila na staroj poziciji, ovaj problem nikada nije javljao, premda su i tada plovila bila privezana u njezinoj neposrednoj blizini, pa čak i bliže.

U vašem slučaju, pretpostavljam da vaša nova jedrilica ima veći gaz i da ste je morali premjestili na neki drugi vez s većom dubinom, možda i na drugi kraj lučice. Ta razlika, nekada i samo nekoliko desetaka metara, može biti razlog da je vaše plovilo više izloženo posljedicama udara groma.

Pitanja šaljite na more@slobodnadalmacija.hr.

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Čitajte sve o jedrenju, đitama po Jadranu, brodovima na struju, brodskim motorima i popravku broda. Učimo vas kako održavati brod. 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Prije pet godina svoju staru jedrilicu zamijenio sam većom i držim je privezanu u lučici na jednom našem otoku. Do sada nisam imao ovaj problem, ali na ovoj novoj mi se instrumenti često kvare, ili, kako serviser dobavljača kaže, pregore. Svaki put me uvjerava da je kvar posljedica udara groma i da se to ne može popravljati nego da kupim novi. Nije mi jasno kako je moguće da do sada nisam imao taj problem, a u zadnjih pet godina ovo se dogodilo već tri puta. Molim vaše mišljenje.

Ivica P., Velika Gorica

Kvarovi nastali kao posljedica groma tretiraju se kao prirodni ili vanjski uzroci i nisu pokriveni garancijom od proizvođača. Udarom groma dolazi do snažnog visokonaponskog pražnjenja, ali koje ipak s udaljenošću od mjesta udara dosta slabi. Tako i nastala šteta ne mora biti posljedica direktnog udara groma u plovilo već je dovoljno da udari u njegovoj blizini, jer snažno električno pražnjenje djeluje na sve vodiče, pa tako i na električne instalacije i komponente u uređajima na plovilu.

Naknadni kvar

Ponekad se takvi kvarovi na uređajima i ne pokažu odmah, već naknadno tijekom korištenja, jer ga grom nije uništio nego je samo oslabio neke elemente uređaja, a njihovim nepravilnim radom uređaj pregori tek naknadno. Osiguravatelji takva oštećenja, pa i ona naknadna, a za koja se dokaže da su posljedica groma, priznaje u cijelosti.

Apsolutna zaštita od groma ne postoji, a putanja munje je nepredvidiva, međutim, činjenica je da neke mikrolokacije gromove privlače više od drugih. Poznato je da su vulkanske stijene otočića Jabuke pune željeza, pa za vrijeme nevremena privlače gromove koji tuku direktno u otok. Sjećam se i problema koji su početkom devedesetih godina imali stanovnici jednog dijela Solina.

U to se vrijeme započelo s prelaskom analognih telefona na digitalne, a nakon svakog grmljavinskog nevremena veliki broj digitalnih telefona s tog područja se kvario. Proizvođač nije priznavao garanciju, jer su kvarove pripisivali vanjskom uzroku, gromu.

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image
Električni sklopovi su osjetljivi
Božidar Vukičević/Ilustracija/Cropix
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Neke indicije govore kako se jedna takva lokacija odnedavno možda pojavila i u splitskoj luci, točnije, ispod Banovine. Naime, nakon što je od željeza izrađena skulptura Ruža vjetrova premještena niti pedesetak metara dalje, njoj najbliža plovila privezana uz obalu učestalo imaju štete nastale kao posljedica udara groma.

Nova pozicija

Zadnja takva bila je u rujnu prošle godine, i to na četiri najbliža velika sofisticirana katamarana na jedra. Onom najbližem uništena je kompletna elektronika, sva električna vitla i uređaji, pa i svi setovi akumulatora, a ukupna šteta dosegnula je vrijednost od više stotina tisuća kuna. Na ostala tri katamarana oštećenja su bila manja, uglavnom su stradali navigacijski instrumenti, ali i na njima se visina štete mjeri u stotinama tisuća kuna.

Zanimljivo je kako se ranije, dok je skulptura bila na staroj poziciji, ovaj problem nikada nije javljao, premda su i tada plovila bila privezana u njezinoj neposrednoj blizini, pa čak i bliže.

U vašem slučaju, pretpostavljam da vaša nova jedrilica ima veći gaz i da ste je morali premjestili na neki drugi vez s većom dubinom, možda i na drugi kraj lučice. Ta razlika, nekada i samo nekoliko desetaka metara, može biti razlog da je vaše plovilo više izloženo posljedicama udara groma.

Pitanja šaljite na more@slobodnadalmacija.hr.

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Luka Gerlanc/Ilustracija/Cropix Božidar Vukičević/Ilustracija/Cropix
Luka Gerlanc/Ilustracija/Cropix
Fatalni udar groma ne mora biti izravan
Božidar Vukičević/Ilustracija/Cropix
Električni sklopovi su osjetljivi
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StoryEditorOCM
Nautika

NAUTIČKI SAVJETNIKGrom oštećuje i kad ne udari izravno: ponekad i udaljenost od svega nekoliko desetaka metara može presuditi

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19. rujna 2021. - 10:54
Fatalni udar groma ne mora biti izravan
Fatalni udar groma ne mora biti izravanLuka Gerlanc/Ilustracija/Cropix

Prije pet godina svoju staru jedrilicu zamijenio sam većom i držim je privezanu u lučici na jednom našem otoku. Do sada nisam imao ovaj problem, ali na ovoj novoj mi se instrumenti često kvare, ili, kako serviser dobavljača kaže, pregore. Svaki put me uvjerava da je kvar posljedica udara groma i da se to ne može popravljati nego da kupim novi. Nije mi jasno kako je moguće da do sada nisam imao taj problem, a u zadnjih pet godina ovo se dogodilo već tri puta. Molim vaše mišljenje.

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