inverter 24Vdc/230Vac

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Na izlaz pravog sinusnog (pure sine) invertera kupljenog u Hvaljen Budi,  
spojio sam LED svjetiljku 28W s internim transformatorom 230Vac/23,5Vdc.

Svjetiljka svijetli kako treba (normalnim intenzitetom) dok je sklopka  

ostaje tinjati slabijim intenzitetom.




je uzemljeno sukladno shemi spajanja.


svijetlila normalno oko 30 min.







treba spojiti na inverter "podivljati"?









Re: inverter 24Vdc/230Vac
On 12/13/2016 09:42 AM, ham wrote:
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Iskljucis svjetiljku, a inverter je i dalje ukljucen?
A kada iskljucis i inverter?

Meni u dnevnom 3 GU-ledice slabo svijetle i kada su ISKLJUCENE!
Koliko metara vodica imas u krugu te led-svjetiljke?




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Sto si htio ovim reci?





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Ako je uredjaj iskljucen FIZICKI sklopkom, nema problema.
A ako je na StandBy, to vjerojatno trosi vise nego sto se stvara raznim  
indukcijama i opet ne bi trebalo biti problema...



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Slabe baterije multimetra?  :-)


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Branko Vasiljev:
Vise se NIkada Nitko NECE Na Softveru
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Re: inverter 24Vdc/230Vac

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Inverter na izlazu ima H most i oba voda su pod naponom (nema faze i nule  
nego 2 protufazna 110V AC izlaza), kad se prekine jedan kapacitivni odvod je  
dovoljan da LED svijetli.


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Nistra, PC ce raditi. PC je zapravo vrlo nezahtjevni potrosac - nije  
osjetljiv na frekvenciju/valni oblik i sl (na ulazu je ispravljac), ono sto  
je bitno da su mase ispravne (99% ostecenja IT opreme je zbog losih masa).
Skidanje uzemljenja ce vjerojatno izazvati probleme (struje kroz filtere ce  
se zatvarati preko neceg drugog).  



Re: inverter 24Vdc/230Vac
13.12.2016. u 18:17, megamusic je napisao/la:
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Onda bi pomoglo da prekidam i fazu i nule, preko nekog releja (ili da  
skinem masu s lampe)?


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izvrsna vijest!!! :)

Re: inverter 24Vdc/230Vac
On 12/14/2016 12:11 AM, ham wrote:
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Relej kojem mirni kontakt kratko spaja prikljucke lampe (na strani lampe)?

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Re: inverter 24Vdc/230Vac

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Vjerojatno da. Mozes jos probati umjesto obicnog prekidaca staviti  
izmjenicni na kojem na jedan ulaz dovedes fazu, drugi preko 47K/2W spojis na  
nulu a  na srednji odvod prema zarulji - kad je prekidac iskljucen odvod je  
preko 47K spojen na nulu.
Inace, najbolje rjesenje bi bilo da rasvjeta ide direktno sa akumulatora...

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Na mase pripazi jer izlaz na malim inverterima cesto nije odvojen od ulaza,  
pa proboj na 220V strani moze podignit kompletan baterijski na visi  
potencijal (zastita tad ne proradi).  



Re: inverter 24Vdc/230Vac
On 12/14/2016 02:42 AM, megamusic wrote:
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Zasto taj otpornik?


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Sekundarno?
Indukcija se dogadja na vodu od prekidaca do lampe?


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A kod nekih je vazno postojanje uzemljenja jer preko razlike potencijala  
mase/nule i zemlje kontrolira struju invertera?


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Vise se NIkada Nitko NECE Na Softveru
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Re: inverter 24Vdc/230Vac

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Da nedodje do kratkog spoja ako je prekidac make-before-break tipa.

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Nerazumjem. Kad je rasvjeta na izlazu invertera ima vece gubitke a ako je to  
rasvjeta razvodnog ormara pozeljno je da radi i u slucaju kvara invertera.
Btw nije indukcija nego kapacitivni odvod.
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Nemoze tako, struja invertera ne ide kroz zemlju. To uzemljenje je  
vjerojatno za RFI  i da ne trese struja na baterijama ako izlaz dodje u  
kontakt sa zemljom.
Kod nekih invertera struja se kontrolira pomocu shunta izmedju - izlaza  
boost DC/DC pretvaraca i H mosta, taj tip invertera ne detektira kratki spoj  
izlaza sa baterijama.  



Re: inverter 24Vdc/230Vac
On 12/14/2016 05:46 PM, megamusic wrote:
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OK




Eee... Htio si reci da umjesto takve lampe za 230V nabavi lampu za 24Vdc!

kapacitivni odvod imati karikirano 10 puta manji utjecaj....


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A sta se onda moglo dogoditi mome frendu koji je na krivu tocku spojio  
uzemljenje i zdimili se svi Mosfetovi UPS-a?



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Vise se NIkada Nitko NECE Na Softveru
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Re: inverter 24Vdc/230Vac

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Kako i gdje je bilo spojeno? Izlaz UPS-a nije galvanski odvojen od ulaza a  
kod nekih (best fortress) je i baterija na potencijalu mreze.
Spajanjem uzemljenja na nepredvidjeno mjesto tad se naravno moze stvoriti  
petlja koja uzrokuje stetu.
Ako je inverter izoliran od zemlje uzemljenje se moze teoretski spojiti bilo  
gdje bez problema (otvoren strujni krug - nema struje).  



Re: inverter 24Vdc/230Vac
On 12/14/2016 05:46 PM, megamusic wrote:
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Kao da sam prizvao nesrecu!
Bas sam juce popravljao jednu mikrovalnu:
Izbacivala je osigurac cim se otvore vrata
( Preklopni mikro-prekidac je 'postao' takav tip preklopke) :-)


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Vise se NIkada Nitko NECE Na Softveru
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