ANSI Ceramic Bushing yog dab tsi?

ANSI ceramic bushingsyog cov khoom siv ceramic bushing uas ua raws li cov qauv kev teeb tsa los ntawm American National Standards Institute (ANSI). Lawv tau tsim tshwj xeeb los ua kom tau raws li cov qauv rwb thaiv tsev, kev txhawb nqa tshuab, thiab kev tiv thaiv kev nyab xeeb rau cov khoom siv hluav taws xob siab hauv North America thiab kev lag luam thoob ntiaj teb. Nws muab cov khoom zoo heev ntawm cov ntaub ntawv ceramic nrog cov qauv nruj ntawm ANSI cov qauv. Nws yog ib qho ntawm cov pawg tseem ceeb ntawm cov khoom rwb thaiv tsev siab hauv lub zog hluav taws xob.
I. Lub Ntsiab Lus Tseem Ceeb: Dab tsi yog ib qhoANSI Ceramic Bushing?
ANSI ceramic bushings tsis yog hais txog ib daim ntawv tshwj xeeb, tab sis yog tsim, tsim khoom, thiab sim ua raws li cov qauv ANSI (xws li ANSI C37 series "High Voltage Switchgear Standards", ANSI/IEEE C57 series "Transformer Standards", thiab lwm yam). Lub hauv paus yog kom ntseeg tau tias qhov kev ntseeg tau ntawm rwb thaiv tsev, kev ruaj khov ntawm lub tshuab, thiab kev sib pauv ntawm cov khoom hauv qhov chaw muaj hluav taws xob siab los ntawm cov qauv ntsuas, cov kev ua tau zoo, thiab cov txheej txheem sim, tshwj xeeb tshaj yog rau North American fais fab grids thiab cov haujlwm thoob ntiaj teb uas txais yuav cov qauv ANSI.
II. Cov Qauv Tseem Ceeb ANSI Ua Raws Li
Kev tsim thiab tsim cov ANSI ceramic bushings yuav tsum ua raws li ntau tus qauv. Cov qauv tseem ceeb suav nrog:
​ANSI C37.04​: Qhia txog cov kev ntsuas ntsuas, qib rwb thaiv tsev, thiab cov txheej txheem sim (xws li lub zog zaus tiv taus voltage, xob laim impulse tiv taus voltage) rau cov switchgear siab voltage (suav nrog bushings);
​ANSI C37.34​: Cov kev cai rau cov bushings high-voltage, suav nrog qhov ntev ntawm kev kam rau siab, cov khoom siv kho tshuab (tensile, bending, torsion), thiab kev ua haujlwm thermal stability;
ANSI/IEEE C57.19.01​: Cov qauv rau cov bushings transformer, txhais kom meej meej txog qhov ntsuas hluav taws xob, ntsuas tam sim no, qhov kub nce siab, thiab kev ua haujlwm sealing ntawm bushings;
ANSI C29 series​: Cov qauv kev sim lub zog thiab kev ua haujlwm hluav taws xob rau cov insulators sab nraum zoov (suav nrog cov bushings ncej / hla phab ntsa) (xws li lub zog khoov, kev sim ua kom muaj kuab paug);
Cov qauv no ua kom ntseeg tau tias muaj kev sib raug zoo (xws li qhov ntev ntawm kev teeb tsa sib xws) thiab kev ntseeg tau (los ntawm kev sim ua ke nruj) ntawm ANSI ceramic bushings ntawm cov chaw tsim khoom sib txawv thiab cov khoom sib xyaw.
III. Cov yam ntxwv ntawm cov qauv thiab cov khoom siv (Ua kom zoo dua raws li cov qauv ANSI)
Cov qauv ntawm ANSI ceramic bushings zoo ib yam li cov ceramic bushings dav dav. Txawm li cas los xij, vim yog cov kev cai ntxaws ntxaws ntawm ANSI cov qauv, kev xaiv cov khoom siv thiab kev tsim qauv ntxaws ntxaws tso ntau qhov tseem ceeb rau kev hloov pauv tus qauv:
1. Cov Khoom Siv Hluav Taws Xob Uas Muaj Ceramic
Kev Xaiv Khoom Siv: Siv cov khoom siv aluminium oxide ceramic uas muaj purity siab (Al₂O₃ cov ntsiab lus ≥ 95%) lossis silicon dioxide ceramic (raws li ASTM C609 tus qauv txhais tias yog "electrical ceramic") kom ntseeg tau tias qhov tiv taus rwb thaiv tsev (≥ 10¹³ Ω·cm), lub zog dielectric (≥ 15 kV/mm), thiab lub zog kho tshuab (lub zog khoov ≥ 150 MPa) ua tau raws li cov qauv.
Kev Tsim Qauv:
* Cov bushings sab nraum zoov feem ntau muaj tus lej thiab qhov sib nrug ntawm cov kaus mom uas tau teev tseg los ntawm ANSI cov qauv (xws li qhov sib txawv ntawm txoj kab uas hla thiab qhov ntev ntawm lub kaus mom ntawm txhua ntu), kom ua tau raws li qhov yuav tsum tau ua kom deb (xws li 10 kV bushing creepage ratio ≥ 25 mm / kV);
* Cov bushings sab hauv tsev feem ntau yog cov thooj voos kheej kheej du lossis nrog cov tiab luv luv, tsom mus rau qhov loj me me (ua raws li ANSI C37.34 qhov yuav tsum tau ua kom ntev, xws li qhov sib txawv ntawm txoj kab uas hla ≤ ± 0.5 hli).
2. Cov Khoom Siv Hlau
Cov hlau kawg npog/filaments ntawm ob qho kawg siv cov hlau lossis tooj liab raws li ANSI B16.5 tus qauv (xws li galvanized carbon steel, stainless hlau 304), kom ntseeg tau tias tiv taus corrosion.
Qhov loj ntawm cov qhov txuas sib txuas ua raws li cov qauv ANSI (xws li txoj kab uas hla ntawm lub qhov ntsia hlau, cov lus qhia txog xov), kom ntseeg tau tias muaj kev sib pauv ncaj qha nrog cov busbars thiab cov cable connectors uas siv ntau hauv North America (tsis tas yuav hloov kho ntxiv).
3. Kev Sib Nqus thiab Kev Tiv Thaiv(rau sab nraum zoov/qhov chaw ntub dej) Raws li qhov yuav tsum tau ua ntawm ANSI C57.19.01, kev tsim qauv kaw ob zaug tau txais yuav (nrog roj hmab silicone kub siab lossis epoxy resin sau qhov sib txawv ntawm lub cev ceramic thiab cov hlau txuas), thiab "kev sim dej" (xws li qhov tsis kam ntawm rwb thaiv tsev tseem tshuav ≥ 100 MΩ tom qab 24 teev ntawm kev ntub dej) tau ua kom ntseeg tau tias nws tsis ntub hauv nag hnyav thiab qhov chaw ntub dej siab.