Video: Dab tsi yog qhov siab tshaj plaws ntawm qhov poob siab tso cai rau hauv av xaim?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
NEC pom zoo tias cov siab kawg ua ke hluav taws xob poob rau ob qho tib si feeder thiab ceg Circuit Court yuav tsum tsis txhob ntau tshaj 5%, thiab lub siab kawg ntawm lub feeder lossis ceg Circuit Court yuav tsum tsis pub tshaj 3% (Fig. 1). Qhov kev pom zoo no yog qhov teeb meem kev ua haujlwm, tsis yog teeb meem kev nyab xeeb.
Ua kom pom qhov no, qhov siab tshaj plaws tso cai volt poob yog dab tsi?
Yog tias cov khoom siv yog ib theem ntawm qib ib txwm ntawm 240 V, qhov no txhais tau tias a siab tshaj volt poob ntawm 4% ntawm 240 V uas yog 9.6 V, muab (hauv cov ntsiab lus yooj yim) ib qho load hluav taws xob tsawg li 230.4 V. Rau 415 V peb-theem system, tso cai volt poob yuav yog 16.6 V nrog ib kab load hluav taws xob qis 398.4v.
Tsis tas li ntawd, koj yuav suav li cas qhov siab tshaj qhov poob qis? Yuav kom xam voltage poob:
- Muab cov tam sim no hauv amperes los ntawm qhov ntev ntawm Circuit Court hauv ko taw kom tau ampere-feet. Qhov ntev ntawm Circuit Court yog qhov kev ncua deb ntawm lub hauv paus chiv keeb mus rau qhov kawg ntawm lub voj voog.
- Faib 100.
- Muab ntau los ntawm qhov tsim nyog voltage poob tus nqi hauv cov ntxhuav. Qhov tshwm sim yog voltage poob.
Yog li ntawd, qhov feem pua ntawm qhov kev poob qis yog qhov txaus?
5%
Qhov av tsis zoo puas tuaj yeem ua rau muaj hluav taws xob poob?
Cov tsos mob ntawm hluav taws xob poob Koj feem ntau ua tau 'tsis pom qhov corrosion hauv kev sib txuas lossis cov xaim puas uas yog ua rau qhov teeb meem. Hauv av - sab hluav taws xob poob , ib qho feem ntau overlooked ua rau ntawm hluav taws xob teeb meem, tuaj yeem ua rau feem ntau ntawm cov tsos mob no. Txhua lub voj voog lossis cov khoom siv tsuas yog zoo li nws hauv av.
Pom zoo:
Dab tsi yog rau qhov sib txawv loj ntawm lub koom haum los ntawm qhov tsawg tshaj plaws mus rau loj tshaj plaws ecologists?
Lub koom haum loj yog dab tsi, los ntawm qhov tsawg tshaj plaws mus rau qhov loj, uas cov kws tshawb fawb feem ntau kawm? 6 theem sib txawv ntawm lub koom haum uas ecologists nquag kawm yog hom, pejxeem, zej zog, ecosystem, thiab biome
Nyob rau hauv dab tsi kev taw qhia yog qhov siab tshaj plaws ntawm kev nce?
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Dab tsi yog cov ions nyob rau hauv siab tshaj plaws concentration nyob rau hauv lub extracellular kua?
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