Cov txheej txheem:

Yuav ua li cas koj xam voltage poob feem pua?
Yuav ua li cas koj xam voltage poob feem pua?

Video: Yuav ua li cas koj xam voltage poob feem pua?

Video: Yuav ua li cas koj xam voltage poob feem pua?
Video: Saib Mis paub Poj niam (hluas nkauj) tus yam ntxwv lub siab 2024, Kaum ib hlis
Anonim

Yuav kom xam voltage poob:

  1. 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.
  2. Faib 100.
  3. Muab faib raws li tsim nyog hluav taws xob poob tus nqi hauv cov rooj. Qhov tshwm sim yog hluav taws xob poob .

Xav txog qhov no, dab tsi yog lub mis rau xam qhov voltage poob?

Voltage poob ntawm cov khoom siv hluav taws xob tuaj yeem txiav txim siab los ntawm kev sib npaug ntawm qhov tam sim no ntawm Circuit Court los ntawm tag nrho cov kev tiv thaiv ntawm cov khoom siv hluav taws xob: VD = I x R.

Qhov thib ob, qhov feem pua ntawm qhov poob qis yog qhov lees txais? 5%

Kuj Paub, koj yuav suav li cas voltage poob thiab cable loj?

Rau xam tus hluav taws xob poob rau ib lub voj voog raws li feem pua, muab cov tam sim no (amps) los ntawm qhov kab ntev (meters); ces faib tus lej no los ntawm tus nqi hauv lub rooj. Piv txwv li, 30m khiav ntawm 6mm2 kab nqa 3 theem 32A yuav ua rau 1.5% poob : 32A x 30m = 960Am / 615 = 1.5%.

Dab tsi yog qhov zoo voltage poob?

A zoo kev sib txuas yuav tsum muaj a hluav taws xob poob 0.2 volts los yog tsawg dua. Cov hluav taws xob poob ntawm qhov tsis zoo yuav tsum yog 0.3 volts lossis tsawg dua. Yog tias hluav taws xob poob siab dhau lawm, teem koj DVM mus rau 2 volt scale thiab pib tshawb xyuas txhua qhov kev sib txuas ntawm qhov tsis zoo kom pom qhov kev sib txuas tsis zoo lossis cable.

Pom zoo: