54
3 ~ 50/60Hz Trifasikhv trofodosiva 50 hv 60 Hz.
I
1
. Aporrofhmevno reuvma me antivstoico reu-v
ma I
2
kai tavsh kophv" U
2
.
IP23. Baqmov" prostasiva" tou skeletou.v
Baqmov" 3 san deuvtero yhfeivo shmaivnei
ovti authv h suskeuhv eivnai katavllhlh gia
na leitourgeiv se exwteriko cwvro kavtw
apov brochv.
Katavllhlh gia na leitourgeiv se cwvrou"
me auxhmevno kivnduno.
SHMEIWSEIS: H suskeuhv scediavsthke epivsh" gia na
leitourgeiv me baqmov ruvpansh" peribavllonto" 3 (blevpe
IEC 664).
2.5 QESH SE LEITOURGIA
H egkatavstash th" suskeuhv" prevpei na ekteleivtai apov
eidikeumevno proswpikov. Ole" oi sundevsei" prevpei na
ektelouvntai suvmfwna me tou" iscuvonte" kanonismouv
"
kai thrwvnta" plhvrw" th nomoqesiva pou problevpetai gia
thn apofughv atuchmavtwn (blevpe CEI 26-10 CELENEC
HD427).
Sundevste thn trofodosiva tou aevra sth suvndesh B.
Se perivptwsh pou h trofodosiva tou aevra proevrcetai
apov meiwthvra pivesh" enov" sumpiesthv hv miav" kentrikhv"
egkatavstash", autov prevpei na ruqmivzetai se pivesh exov-
dou ovci anwvterh apov 8 bar (0,8 MPa). An h trofodosi-
va tou aevra proevrcetai apov fiavlh sumpiesmevnou aevra
authv prevpei na eivnai efodiasmevnh me ruqmisthv pivesh".
Mhn sundevete pote
v miav fiavlh sumpiesmevnou aevra kateu-
qeivan ston meiwthvra pivesh" th" suskeuhv"! H pivesh qa
mporouvse na uperbeiv thn ikanovthta tou meiwthvra pou
qa mporouvse na ekrageiv!
Sundevste to kalwvdio trofodosiva" A: o kivtrino"-pravsi-
no" agwgov" tou kalwdivou prevpei na sundeqeiv se apo-
telesmatikov suvsthma geivwsh" th" egkatavstash". Oi
upovloipoi agwgoiv prevpei na sundeqouvn sth grammhv
trofodosiva" mevsw enov" diakovpth pou na topoqeteivtai,
an eivnai dunatovn, kontav sto cwvro kophv
" gia na exa-
sfalivzetai evna grhvgoro sbhvsimo se perivptwsh epeiv-
gousa" anavgkh".
H ikanovthta tou magnhtoqermikouv diakovpth hv twn asfa-
leiwvn se seirav sto diakovpth prevpei na eivnai ivsh me
to reuvma I
1
aporrofhmevno apov th suskeuhv.
To aporrofhmevno reuvma I
1
sumperaivnetai apov thn anav-
gnwsh twn tecnikwvn stoiceivwn pavnw sth suskeuhv se
scevsh me thn upov diavqesh tavsh trofodosiva" U
1
.
Endecovmene" proektavsei" prevpei na eivnai katavllhlh"
diamevtrou se scevsh me to aporrofhmevno reuvma I
1
.
3 CRHSH
Prin apov th crhvsh diabavste prosektikav tou" kanovne"
CEI 26/9 - CENELEC HD 407 kai CEI 26.11 - CENELEC
HD 433. Elevgxte epivsh" thn kalhv movnwsh twn kalw-
divwn.
Bebaiwqeivte ovti den eivnai piesmevno" o diakovpth" ekkivnh-
sh". Anavyte th suskeuhv mevsw tou diakovpth C. Authv
h enevrgeia epishmaivnetai apov to avnamma th" endeik-
tikhv" lucniva" D.
Pievzonta" suvntoma to diakovpth th" tsimpivda" ceiriv-
zetai to avnoigma th" rohv" sumpiesmevnou aevra. Twvra
ruqmivste thn pivesh pou faivnetai sto manovmetro F se
4,7 bar (0,47 MPA) energwvnta" sto koumpiv E tou
meiwthvra kai staqeropoihvste sth sunevceia to ivdio
koumpiv pievzonta" pro" ta kavtw.
Sundevste th labivda geivwsh" sto mevtallo kophv".
To kuvklwma kophv" den prevpei na topoqeteivtai skovpima
se avmesh hv evmmesh epafhv me ton agwgov prostasiva"
allav me to mevtallo pou prevpei na kopeiv.
An to upov epexergasiva mevtallo sundevetai skovpima me
th gh mevsw tou agwgouv prostasiva", h suvndesh prevpei
S
na eivnai ovso givnetai piov avmesh kai na ekteleivtai me
agwgov diamevtrou ivsh" toulavciston m v ekeivnh tou agw-
gouv epistrofhv" tou reuvmato" kophv" pou na sundevetai
me to upov epexergasiva mevtallo sto ivdio shmeivo tou
agwgouv epistrofhv", crhsimopoiwvnta" th labivda tou
agwgouv epistrofhv" hv crhsimopoiwvnta" mia deuvterh
labivda geivwsh" topoqethmevnh poluv kontav. Prevpei na
lambavnetai kavqe mevtro profuvlaxh" gia na apofeuvgon-
tai periferovmena reuvmata.
Epilevxte, mevsw tou diakovpth M, to reuvma kophv".
Crhsimopoieivte to mpek ø 1 mevcri 50 A, to mpek ø 1,2
apov 45 mevcri 70 A kai to mpek ø 1,3 apov 70 mevcri
90 A.
PROSOCH!
•
Me reuvmata anwvtera twn 45§50 A to mpek den prev-
pei na aggivzei to temavcio pou prevpei na kopeiv, gi v
autov eivnai aparaivthto na crhsimopoihvsete thn apov-
stash duvo aicmwvn Mont. 1404.
• To mpek ø 1,3 mm mporeiv na crhsimopoieivtai se
antikatavstash tou ø 1,2 mm kai gia reuvmata katwvte-
ra apov 70 A, an eivnai epitrepthv mia elafrav meivwsh
tou epipevdou poiovthta" th" kophv".
PROSOCH: H poiovthta th" kophv" eivnai shmantikav uyh-
lovterh an to mpek diathreivtai se apovstash 3 mm periv-
pou apov to mevtallo. Gia praktikouv" lovgou", merikev"
forev", protimavtai h kophv me to mpek efaptovmeno.
Au
thv h tecnikhv den prevpei na efarmovzetai me reuvma-
ta anwvtera apov 45§50 A, giativ prokaleiv mia grhvgorh
(hv kai avmesh) katastrofhv th" ophv" tou mpek pou sune-
pavgetai mia kophv ceivristh" poiovthta".
To avnamma th" kovkkinh" lucniva" (O) shmaivnei ovti h
kophv PREPEI na ekteleivtai crhsimopoiwvnta" thn
eidikhv apovstash (Mont. 1404).
Bebaiwqeivte ovti h labivda geivwsh" kai to mevtallo briv-
skontai se kalhv hlektrikhv epafhv eidikav me bernikwmev-
ne" kai oxeidwmevne" lamarivne" hv me monwtikev" ependuv-
sei".
Mhn sundevete th labivda geivwsh" me to temavcio ulikouv
pou prevpei na afairevsete.
Pievste to diakovpth th" tsimpivda" gia na anavyete to
tovxo ekkivnhsh".
An metav apov 2 deuterovlepta den arcivzei h kophv, to
tovxo ekkivnhsh" sbhvnei kai gia na to xananavyete prev-
pei na pievsete pavli to diakovpth.
Katav thn kophv prevpei na diathreivte kavqeta thn tsim-
pivda.
Afouv oloklhrwvsete thn kophv kai afhvsete to diakovpth,
o aevra" sunecivzei na bgaivnei apov thn tsimpivda gia 100
deuterovlepta perivpou gia na epitrevyei thn yuvxh th"
ivdia".
Kalov eivnai na mhn sbhvsete th suskeuhv prin a
pov to
tevlo" autouv tou crovnou.
Se perivptwsh pou prevpei na kavnete opev" hv pou prev-
pei na arcivsete thn kophv apov to kevntro tou metavllou,
prevpei na topoqethvsete thn tsimpivda me klivsh kai na
eik. 2
eik. 3
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