Nrov version piav qhia
Qauv ntawm air switch:
C65 / D65 D stands rau lub hwj chim, C sawv rau teeb pom kev zoo.
1. Tam sim no, DZ series cua hloov pauv (cov kab hluav taws xob me me nrog kev tiv thaiv to) tau siv hauv tsev neeg.
Cov qauv hauv qab no / cov lus qhia muaj xws li: C16, C25, C32, C40, C60, C80, C100, C120 thiab lwm yam kev qhia tshwj xeeb, qhov twg C sawv cev tam sim no, uas yog, qhov tawm tam sim no, piv txwv li, C32 sawv cev rau kev coj. -off tam sim no yog 32 amps, thiab ib tug 6500W dej rhaub feem ntau yog ntsia rau siv C32, rau nruab 7500W, 8500W dej rhaub siv C40 cua hloov.
2. Cov qauv siv hauv kev lag luam yog: DW thiab DZ hom rau lub zog hluav taws xob;
Cov ntsiab lus 20, 32, 50, 63, 80, 100, 125, 160, 250, 400, 600, 800, 1000 (unit A).
Qhov ntsuas tam sim no ntawm qhov qhib Circuit Court yog ob peb amps rau ntau pua amps, xws li 10 amps thiab 600 amps, tab sis qhov siab tshaj plaws tam sim no ntawm DZ zoo tib yam 47-63 series yog 63 amps, muab faib ua 5 10 16 (15 ) 20 25 32 (30) 40 50 60 (63).
Cov ntsiab lus tseem ceeb:
1. Qhov ntsuas hluav taws xob ntawm qhov hloov pauv huab cua ntau dua lossis sib npaug ntawm qhov ntsuas hluav taws xob ntawm kab;
2. Qhov ntsuas tam sim no ntawm qhov hloov pauv huab cua thiab qhov ntsuas tam sim no ntawm qhov kev tso tawm overcurrent yog ntau dua lossis sib npaug ntawm cov ntsuas tam sim no ntawm kab.
piv txwv:
DZ47-60A C25:
DZ47--series ntawm cov hluav taws xob hluav taws xob me me (muaj ntau yam, uas yog lub npe hu ua cov chaw tsim khoom)
LE — nrog cov dej ntws tawm ua haujlwm
60 - tus ncej ntsuas yog 60A
C - Instantaneous tripping overcurrent ntau raws li cov qeb meej, xws li 5 ~ 7 lossis 7 ~ 10 zaug, D yog 10 ~ 14 zaug rau hom fais fab
Cov cua hloov pauv yog siv los tiv thaiv cov xov hlau thiab tiv thaiv hluav taws, yog li nws yuav tsum tau xaiv raws li qhov loj ntawm cov xov hlau tsis yog lub zog ntawm cov khoom siv hluav taws xob.
1. Yog tias qhov hloov pauv huab cua loj dhau, tsis tas yuav tiv thaiv cov xov hlau. Thaum cov xaim hluav taws xob ntau dhau lawm, qhov hloov pauv huab cua yuav tsis dhia, uas yuav ua rau muaj kev phom sij rau tsev neeg kev nyab xeeb.
2. Yog li koj yuav tsum kuaj xyuas qhov loj ntawm cov xaim ua ntej, yog tias cov xaim tso cai rau qhov hloov pauv huab cua loj dua, koj tuaj yeem hloov pauv mus rau qhov hloov pauv huab cua loj dua.
1.5 square hlau nrog C10 hloov;
2.5 square hlau nrog C16 lossis 20 hloov;
4 square xov hlau nrog C25 hloov;
6 square kab nrog C32 hloov.
3. Raws li lub hauv paus twg los xaiv lub ntsiab thiab tau txais huab cua hloov (3P lossis 4P) ntawm lub txee tsis muaj hluav taws xob, saib kev xaiv ntawm plaub-ncej Circuit Court breaker
Nyob rau hauv cov xwm txheej hauv qab no, nws yog ib qho tsim nyog yuav tsum siv plaub-ncej Circuit Court breaker:
1. Ib tug plaub-ncej Circuit Court breaker yuav tsum raug xaiv rau ib tug system nrog dual fais fab hloov yuav tsum tau kom tau raws li qhov yuav tsum tau cais cais rau kev tu, kuaj thiab overhaul ntawm tag nrho cov system;
2. Ib theem tseem ceeb hloov ntawm txhua lub tsev nyob yuav tsum siv ob-ncej hloov nrog N ncej (plaub-ncej Circuit Court breakers tuaj yeem siv tau);
3. Tus tiv thaiv tam sim no seem (kho hloov pauv) yuav tsum xyuas kom meej tias tag nrho cov nyob ntawm qhov chaw tiv thaiv raug txiav tawm. Yog li ntawd, rau cov kab hluav taws xob uas yuav tsum muaj kev tiv thaiv tam sim no, N ncej (xws li plaub tus ncej) yuav tsum raug xaiv. Hluav taws xob Circuit Court breakers.
Nws yog xav txog tias koj yuav siv lub tshuab cua txias rau yav tom ntej, yog li tag nrho qhov chaw hloov chaw yuav tsum yog 32. Yog tias koj muaj lub tshuab cua txias ntxiv rau yav tom ntej, koj yuav tau siv 40-60 qhov chaw hloov chaw. Yog tias koj muaj 4 plag tsev, koj tuaj yeem siv lub teeb pom kev zoo thiab teeb pom kev zoo ntawm txhua lub tsev Sockets siv 15A, thiab yog tias muaj cov khoom siv hluav taws xob loj xws li cua txias, 15A cua hloov yuav tsum siv rau kev xaim. Tshwj xeeb tshaj yog nyob rau hauv chav ua noj, qhov twg yuav muaj ntau yam khoom siv hluav taws xob nyob rau hauv lub neej yav tom ntej, yuav tsum tau teeb tsa ib qho kev hloov pauv huab cua. Qhov no yuav tsum raug xam tias nyob deb. , tawm hauv chaw kom muaj zog ntxiv rau yav tom ntej. Cov pej xeem account "Mechanical Engineering Literature", chaw nres tsheb roj rau cov kws ua haujlwm!
1. Tag nrho lub peev xwm ntawm tag nrho cov khoom siv hluav taws xob yog 5000W, thiab lub load tsis hnyav. Tsuas yog siv [32A / 2P Circuit Court breaker ntxiv rau cov khoom siv hluav taws xob tso tawm]. Yog tias [xav tau qhov tseem ceeb] raug txiav txim siab, qhov 25A specification kuj tau txais.
2. Kev suav cov mis: Ijs=Kx*P/U/cosφ
hauv:
Ijs - xam tam sim no
Kx — xav tau coefficient; hluav taws xob hauv tsev Kx nruab nrab ntawm 0.5-0.7 txaus
P - installation muaj peev xwm; tag nrho cov khoom siv hluav taws xob (sockets kuj suav nrog, thiab txhua 100W kwv yees)
cosφ — fais fab tuag; pej xeem cov kab hluav taws xob raug kwv yees ntawm 0.85-0.9
3. Tom qab tau txais cov nqi ntsuas tam sim no, xaiv lub Circuit Court breaker uas tuaj yeem teeb tsa nrog qhov loj ntawm 1 lossis 2, tab sis ua tib zoo saib xyuas qhov sib txuam ntawm Circuit Court breaker thiab kab nws tiv thaiv ( taw tes rau ntawm kab hluav taws xob)
16A - cov kab sib txuas yog BV-2.5;
20, 25A - cov kab sib txuas yog BV-4;
32A - cov kab sib txuas yog BV-6;
40A — Cov kab sib txuas yog BV-10 (feem ntau yog qhov tshwj xeeb ntawm cov kab nkag hauv tsev, sib xws rau 40A hluav taws xob ntsuas).
4. Cua hloov, tseem hu ua tsis siv neeg hloov, tsis tshua muaj hluav taws xob Circuit Court breaker; lub hauv paus ntsiab lus yog txiav tawm lub Circuit Court thaum lub sij hawm ua hauj lwm tam sim no tshaj qhov ntsuas tam sim no, luv luv Circuit Court, poob ntawm voltage, thiab lwm yam.
DZ47-60A C20 cua hloov, qhov no yog tus qauv ntsuas tam sim no ntawm micro (me) Circuit Court breakers, lo lus Askiv qhia txog kev ua ntau yam sib nqus tripping (kev tiv thaiv luv luv), C feem ntau yog siv rau kev faib hluav taws xob zoo tib yam ( 5-10 zaug), Lwm hom yog hom D, uas yog siv rau cov khoom siv hluav taws xob nrog cov pib tam sim no loj (xws li motors) (10-14 zaug). 20A sawv cev rau qhov ntsuas tam sim no, tab sis nws yuav tsum tau muab sau tseg tias qhov tam sim no yog tus nqi teeb tsa thaum qhov ntsuas kub ntawm 40 degrees Celsius. Hauv kev siv tiag tiag, thov xa mus rau qhov derating nkhaus muab los ntawm cov chaw tsim khoom.
5. Kev xaiv ntawm tsev neeg Circuit Court breaker cua hloov
1. Circuit Court breaker, lub npe tag nrho ntawm lub tshuab hluav taws xob tsis siv neeg lub tshuab hluav taws xob, tseem hu ua cua hloov, yog cov khoom siv hluav taws xob uas siv hluav taws xob tsawg, uas tuaj yeem paub txog kev ua haujlwm xws li luv luv Circuit Court thiab overload.
2. Lub Circuit Court breaker yog siv los ua lub ntsiab tiv thaiv hluav taws xob hloov hluav taws xob lossis cov kab hluav taws xob tiv thaiv hluav taws xob hauv tsev. Thaum lub caij luv luv lossis overload tshwm sim hauv cov kab hauv tsev lossis cov khoom siv hauv tsev, nws tuaj yeem txav mus los thiab txiav tawm lub hwj chim, yog li tiv thaiv cov cuab yeej no los ntawm kev puas tsuaj lossis tiv thaiv kev sib tsoo ntawm kev nthuav dav;
3. Cov tsev neeg feem ntau siv ob-ncej (2P) Circuit Court breakers rau kev tiv thaiv hluav taws xob, thiab ib leeg-ncej (1P) rau kev tiv thaiv ceg;
4. Yog hais tias qhov ntsuas tam sim no ntawm Circuit Court breaker raug xaiv me me dhau, lub Circuit Court breaker yuav nquag nquag thiab ua rau tsis muaj hluav taws xob tsis tsim nyog. Yog tias qhov ntsuas tam sim no ntawm Circuit Court breaker raug xaiv loj dhau, qhov kev cia siab tiv thaiv yuav tsis ua tiav. Yog li ntawd, nruab ib lub Circuit Court breaker thiab xaiv kom raug lub peev xwm ntsuas Tus nqi tam sim no tseem ceeb.
5. Cov lus qhia tshwj xeeb ntawm cov hluav taws xob me me feem ntau yog qhov txawv ntawm qhov ntsuas tam sim no 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, thiab lwm yam;
Yog li cas cov tsev neeg zoo tib yam xaiv lossis txheeb xyuas tus nqi ntawm tag nrho cov khoom thauj tam sim no?
1. Ua ntej xam tus nqi ntawm txhua ceg tam sim no
① Pure resistive loads, xws li lub teeb qhov muag teev, hluav taws xob cua sov, thiab lwm yam, tuaj yeem tau los ntawm kev faib ncaj qha lub zog los ntawm qhov hluav taws xob.
Formula I =power/220v;
Piv txwv li, rau lub teeb 20w, ceg tam sim no I=20W/220=0.09A
Hluav taws xob cov kiv cua, hluav taws xob hlau, hluav taws xob pam, hluav taws xob dej rhaub, hluav taws xob rhaub, hluav taws xob mov cookers, hluav taws xob frying lauj kaub, nqus tsev vacuum, cua txias, thiab lwm yam yog resistive loads;
②Inductive loads, xws li teeb fluorescent, TV teeb, tshuab ntxhua khaub ncaws, thiab lwm yam., yog ib qho nyuaj me ntsis los xam, thiab kev siv hluav taws xob yuav tsum tau txiav txim siab, thiab lub zog tseem ceeb yuav tsum tau txiav txim siab hauv cov kev suav tshwj xeeb. Rau qhov yooj yim ntawm kev kwv yees, tus sau muab ib txoj kev xam yooj yim, uas yog, qhov dav inductive loads Lub hwj chim xam los ntawm kev qhia tias lub load tuaj yeem ua ob npaug. Piv txwv li, ceg tam sim no I{{0}}W/220v=0.09A ntawm lub teeb fluorescent cim 20W, muab ob npaug rau 0.09A*{ {7}}.18A (piv nrog qhov tseeb xam tus nqi ntawm 0.15A, ntau tshaj 0.03A); fluorescent teeb, tub yees, TVs, thiab lwm yam yog cais raws li perceptual.
2. Tag nrho cov load tam sim no yog cov sum ntawm cov ceg tam sim no; paub txog cov ceg tam sim no thiab tag nrho cov tam sim no, koj tuaj yeem xaiv cov ceg hluav taws xob hluav taws xob thiab lub rooj vag hluav taws xob tseem ceeb, lub ntsiab fuse, lub ntsuas hluav taws xob tseem ceeb thiab cov lus qhia ntawm cov kab hluav taws xob, lossis tshawb xyuas qhov tsim los seb qhov tshwj xeeb ntawm cov khoom siv hluav taws xob no. ua tau raws li qhov yuav tsum tau muaj kev nyab xeeb; pej xeem account "Mechanical Engineering Wenhui", chaw nres tsheb roj rau engineers!
Tsis tas li ntawd, txhawm rau ua kom muaj kev nyab xeeb thiab kev ntseeg tau, qhov ntsuas kev ua haujlwm tam sim no ntawm cov khoom siv hluav taws xob feem ntau yuav tsum muaj ntau dua 2 npaug ntawm qhov xav tau qhov siab tshaj plaws tam sim no; Tsis tas li ntawd, thaum tsim thiab xaiv cov khoom siv hluav taws xob, qhov ua tau ntawm cov khoom siv hluav taws xob ntau ntxiv rau yav tom ntej yuav tsum tau coj mus rau hauv tus account, rau cov kev xav tau yav tom ntej tawm ntawm cov npoo;
1. General tam sim no nqa peev xwm ntawm tooj liab conductors
Qhov kev nyab xeeb tam sim no nqa lub peev xwm ntawm cov hlau yog txiav txim siab raws li qhov siab tshaj plaws tso cai rau cov tub ntxhais kub, txias txias, thiab cov xwm txheej tso. Feem ntau, kev nyab xeeb tam sim no nqa lub peev xwm ntawm tooj liab hlau yog 5 ~ 8A / mm², thiab cov hlau txhuas yog 3 ~ 5A / mm².
zoo li:
Kev pom zoo tam sim no muaj peev xwm nqa tau ntawm 2.5 mm² BVV tooj liab hlau yog 2.5 × 8A / mm²=20A
Kev pom zoo tam sim no muaj peev xwm nqa tau ntawm 4 mm² BVV tooj liab hlau yog 4 × 8A / mm²=32A
Qhov thib ob, xam qhov ntu ntu ntawm cov hlau tooj liab
Muab xam rau sab sauv thiab sab qis ntawm cheeb tsam hla ntu S ntawm cov hlau tooj liab uas tau xaiv los ntawm kev siv tus nqi pom zoo ntawm qhov kev nyab xeeb tam sim no nqa lub peev xwm ntawm tooj liab 5 ~ 8A / mm²
S{{0}}[ I / (5 ~ 8)]=0.125 I ~ 0.2 I (mm²)
S - ntu ntu ntawm tooj liab hlau (mm²)
Load tam sim no (A)
3. Kev suav fais fab
Kev thauj khoom dav dav (uas tuaj yeem yog cov khoom siv hluav taws xob, xws li teeb pom kev zoo, tub yees, thiab lwm yam) muab faib ua ob hom, ib qho yog qhov hnyav hnyav thiab lwm yam yog inductive load.
Kev suav cov mis rau cov load resistive: P=UI
Cov mis laij lej rau lub teeb fluorescent load: P{{0}}UIcosф, qhov twg lub zog ntawm lub teeb fluorescent load cosф=0.5. Cov khoom sib txawv inductive muaj qhov sib txawv ntawm lub zog, thiab lub zog ntawm cosф tuaj yeem raug coj los ua 0.8 thaum xam cov khoom siv hauv tsev hauv kev sib koom ua ke.
Qhov ntawd yog hais tias, yog tias tag nrho lub zog ntawm tag nrho cov khoom siv hluav taws xob hauv tsev neeg yog 6000 watts, qhov siab tshaj plaws tam sim no yog I=P/Ucosф=6000/220*0.{ {5}}(A).
Txawm li cas los xij, nyob rau hauv ib txwm muaj, nws tsis tuaj yeem siv cov khoom siv hluav taws xob hauv tsev tib lub sijhawm, yog li ib qho tseem ceeb ntxiv, thiab feem ntau yog {{0}}.5. Yog li ntawd, cov kev suav sau saum toj no yuav tsum tau sau dua tshiab raws li I=P*Common Coefficient/Ucosф=6000*0.5/220*0.8=17(A) Hauv lwm lo lus , tag nrho cov nqi tam sim no ntawm tsev neeg no yog 17A. Cov cua hloov ntawm lub rooj vag loj tsis tuaj yeem siv 16A, thiab suav cov hluav taws xob hluav taws xob ntau dua 17A yuav tsum siv. Feem ntau hais lus, lub zog siv hluav taws xob yog kev siv hluav taws xob ntawm cov khoom siv hluav taws xob, thiab kom meej, nws yog lub zog siv hluav taws xob ntawm cov khoom siv hluav taws xob hauv ib lub sijhawm. Rau cov khoom siv hluav taws xob hauv tsev ib-theem, cov qauv rau kev suav fais fab yog yooj yim:
P=U × I × COSφP
Lub zog, hais txog lub zog siv hluav taws xob: watts (W)
1kW=1000W(1kW=1000W) U voltage
Nyob hluav taws xob yog 220V unit; Qhov hluav taws xob (V)
Tam sim no, chav tsev: ampere (A)
COSφ fais fab tuag tsis muaj chav nyob.
Rau cov khoom siv tsis muaj zog xws li hluav taws xob rauv, hluav taws xob rhaub dej, thiab lwm yam khoom siv cua sov; COSφ=1
The power calculation formula can be simplified as: P=U×I For electrical appliances with inductive loads such as fans and other motors, TVs, etc.; 1>COSφ>{{0}} Cov khoom siv hluav taws xob hauv lub cev feem ntau yog li 0.8. Tam sim no muaj cov khoom siv reactive.
Cov cuab yeej siv hauv tsev feem ntau tsis muaj lub peev xwm thauj khoom.
