3 ~ 50/60Hz
Trifasikhv trofodosiv a 50 hv 60 Hz.
I
.
Aporrofhmev n o reuv m a me antiv s toico reu-v
1
ma I
kai tav s h kophv " U
2
IP23.
Baqmov " prostasiv a " tou skeletou.v
Baqmov " 3 san deuv t ero yhfeiv o shmaiv n ei
ov t i authv h suskeuhv eiv n ai katav l lhlh gia
na leitourgeiv se exwteriko cwv r o kav t w
apov brochv .
S
Katav l lhlh gia na leitourgeiv se cwv r ou"
me auxhmev n o kiv n duno.
SHMEIWSEIS: H suskeuhv scediav s thke epiv s h" gia na
leitourgeiv me baqmov ruv p ansh" peribav l lonto" 3 (blev p e
IEC 664).
2.5 QESH SE LEITOURGIA
H egkatav s tash th" suskeuhv " prev p ei na ekteleiv t ai apov
eidikeumev n o proswpikov . Ole" oi sundev s ei" prev p ei na
ektelouv n tai suv m fwna me tou" iscuv o nte" kanonismouv "
kai thrwv n ta" plhv r w" th nomoqesiv a pou problev p etai gia
thn apofughv atuchmav t wn (blev p e CEI 26-10 CELENEC
HD427).
Sundev s te thn trofodosiv a tou aev r a sth suv n desh B.
Se periv p twsh pou h trofodosiv a tou aev r a proev r cetai
apov meiwthv r a piv e sh" enov " sumpiesthv hv miav " kentrikhv "
egkatav s tash", autov prev p ei na ruqmiv z etai se piv e sh exov -
dou ov c i anwv t erh apov 8 bar (0,8 MPa). An h trofodosi-
v a tou aev r a proev r cetai apov fiav l h sumpiesmev n ou aev r a
authv prev p ei na eiv n ai efodiasmev n h me ruqmisthv piv e sh".
Mhn sundev e te potev miav fiav l h sumpiesmev n ou aev r a kateu-
qeiv a n ston meiwthv r a piv e sh" th" suskeuhv " ! H piv e sh qa
mporouv s e na uperbeiv thn ikanov t hta tou meiwthv r a pou
qa mporouv s e na ekrageiv !
Sundev s te to kalwv d io trofodosiv a " A: o kiv t rino"-prav s i-
no" agwgov " tou kalwdiv o u prev p ei na sundeqeiv se apo-
telesmatikov suv s thma geiv w sh" th" egkatav s tash". Oi
upov l oipoi agwgoiv prev p ei na sundeqouv n sth grammhv
trofodosiv a " mev s w enov " diakov p th pou na topoqeteiv t ai,
an eiv n ai dunatov n , kontav sto cwv r o kophv " gia na exa-
sfaliv z etai ev n a grhv g oro sbhv s imo se periv p twsh epeiv -
gousa" anav g kh".
H ikanov t hta tou magnhtoqermikouv diakov p th hv twn asfa-
leiwv n se seirav sto diakov p th prev p ei na eiv n ai iv s h me
to reuv m a I
aporrofhmev n o apov th suskeuhv .
1
To aporrofhmev n o reuv m a I
gnwsh twn tecnikwv n stoiceiv w n pav n w sth suskeuhv se
scev s h me thn upov diav q esh tav s h trofodosiv a " U
Endecov m ene" proektav s ei" prev p ei na eiv n ai katav l lhlh"
diamev t rou se scev s h me to aporrofhmev n o reuv m a I
3 CRHSH
Prin apov th crhv s h diabav s te prosektikav tou" kanov n e"
CEI 26/9 - CENELEC HD 407 kai CEI 26.11 - CENELEC
HD 433. Elev g xte epiv s h" thn kalhv mov n wsh twn kalw-
div w n.
Bebaiwqeiv t e ov t i den eiv n ai piesmev n o" o diakov p th" ekkiv n h-
sh". Anav y te th suskeuhv mev s w tou diakov p th C. Authv
h enev r geia epishmaiv n etai apov to av n amma th" endeik-
tikhv " lucniv a " D.
Piev z onta" suv n toma to diakov p th th" tsimpiv d a" ceiriv -
zetai to av n oigma th" rohv " sumpiesmev n ou aev r a. Twv r a
ruqmiv s te thn piv e sh pou faiv n etai sto manov m etro F se
4,7 bar (0,47 MPA) energwv n ta" sto koumpiv E tou
meiwthv r a kai staqeropoihv s te sth sunev c eia to iv d io
koumpiv piev z onta" pro" ta kav t w.
Sundev s te th labiv d a geiv w sh" sto mev t allo kophv " .
To kuv k lwma kophv " den prev p ei na topoqeteiv t ai skov p ima
se av m esh hv ev m mesh epafhv me ton agwgov prostasiv a "
allav me to mev t allo pou prev p ei na kopeiv .
An to upov epexergasiv a mev t allo sundev e tai skov p ima me
th gh mev s w tou agwgouv prostasiv a ", h suv n desh prev p ei
54
.
2
sumperaiv n etai apov thn anav -
1
na eiv n ai ov s o giv n etai piov av m esh kai na ekteleiv t ai me
agwgov diamev t rou iv s h" toulav c iston m v ekeiv n h tou agw-
gouv epistrofhv " tou reuv m ato" kophv " pou na sundev e tai
me to upov epexergasiv a mev t allo sto iv d io shmeiv o tou
agwgouv epistrofhv " , crhsimopoiwv n ta" th labiv d a tou
agwgouv epistrofhv " hv crhsimopoiwv n ta" mia deuv t erh
labiv d a geiv w sh" topoqethmev n h poluv kontav . Prev p ei na
lambav n etai kav q e mev t ro profuv l axh" gia na apofeuv g on-
tai periferov m ena reuv m ata.
Epilev x te, mev s w tou diakov p th M, to reuv m a kophv " .
Crhsimopoieiv t e to mpek ø 1 mev c ri 50 A, to mpek ø 1,2
apov 45 mev c ri 70 A kai to mpek ø 1,3 apov 70 mev c ri
90 A.
PROSOCH!
• Me reuv m ata anwv t era twn 45§50 A to mpek den prev -
pei na aggiv z ei to temav c io pou prev p ei na kopeiv , gi v
autov eiv n ai aparaiv t hto na crhsimopoihv s ete thn apov -
stash duv o aicmwv n Mont. 1404.
• To mpek ø 1,3 mm mporeiv na crhsimopoieiv t ai se
antikatav s tash tou ø 1,2 mm kai gia reuv m ata katwv t e-
ra apov 70 A, an eiv n ai epitrepthv mia elafrav meiv w sh
tou epipev d ou poiov t hta" th" kophv " .
PROSOCH: H poiov t hta th" kophv " eiv n ai shmantikav uyh-
lov t erh an to mpek diathreiv t ai se apov s tash 3 mm periv -
pou apov to mev t allo. Gia praktikouv " lov g ou", merikev "
forev " , protimav t ai h kophv me to mpek efaptov m eno.
Authv h tecnikhv den prev p ei na efarmov z etai me reuv m a-
ta anwv t era apov 45§50 A, giativ prokaleiv mia grhv g orh
(hv kai av m esh) katastrofhv th" ophv " tou mpek pou sune-
pav g etai mia kophv ceiv r isth" poiov t hta".
To av n amma th" kov k kinh" lucniv a " (O) shmaiv n ei ov t i h
kophv
PREPEI
eidikhv apov s tash (Mont. 1404).
Bebaiwqeiv t e ov t i h labiv d a geiv w sh" kai to mev t allo briv -
skontai se kalhv hlektrikhv epafhv eidikav me bernikwmev -
ne" kai oxeidwmev n e" lamariv n e" hv me monwtikev " ependuv -
sei".
Mhn sundev e te th labiv d a geiv w sh" me to temav c io ulikouv
pou prev p ei na afairev s ete.
Piev s te to diakov p th th" tsimpiv d a" gia na anav y ete to
tov x o ekkiv n hsh".
An metav apov 2 deuterov l epta den arciv z ei h kophv , to
tov x o ekkiv n hsh" sbhv n ei kai gia na to xananav y ete prev -
pei na piev s ete pav l i to diakov p th.
Katav thn kophv prev p ei na diathreiv t e kav q eta thn tsim-
.
piv d a.
1
Afouv oloklhrwv s ete thn kophv kai afhv s ete to diakov p th,
.
o aev r a" suneciv z ei na bgaiv n ei apov thn tsimpiv d a gia 100
1
deuterov l epta periv p ou gia na epitrev y ei thn yuv x h th"
iv d ia".
Kalov eiv n ai na mhn sbhv s ete th suskeuhv prin apov to
tev l o" autouv tou crov n ou.
Se periv p twsh pou prev p ei na kav n ete opev " hv pou prev -
pei na arciv s ete thn kophv apov to kev n tro tou metav l lou,
prev p ei na topoqethv s ete thn tsimpiv d a me kliv s h kai na
na
ekteleiv t ai
crhsimopoiwv n ta"
eik. 3
eik. 2
thn