Dusha dhulka wax ku ool ah

In si ay u ilaaliyaan aadanaha ee waxyeellada daran ee guryaha oo koronto loo isticmaalo gaar ah RCD qalabka difaaca, fiusaska, MCB (circuit jebiya) iyo muuqaalada kale ee ammaanka. Nidaamka ugu caansan ee ammaanka aadanaha waxaa loo arkaa inay dusha dhulka. Tani qalab earthing gaar ah kuwaas oo ujeedada waa in lagu xiro in ay "dhulka" oo gogo 'gaarka ah ee qalabka korontada. Or, in si kale loo dhigo, ku xiran in midba midka kale in ay electrodes siman oo toosan (diverters), hoos dusha dhulka at qoto dheer ah oo.

On iska caabin Bannaanka waxaa saameeya:

• ku qor, qaabka iyo xaaladda ciidda;
• sifooyinka electrodes ah;
• electrodes qoto dheer dhacdo;
• tirada electrodes.

dhulka Functional waxaa loo qaybiyaa laba nooc:

• Ilaalinta - loogu talagalay si ay u ilaaliyaan qalabka korontada-circuit gaaban, dadka ka waxyeellada daran ee hadda khatar ah in ay dhacaan waqtiga gardarrada.
• Shaqaalaha - taageerada la doonayo waxqabadka rakibo korontada via grounding ee qaybaha ay ku nool yihiin.

Geedi socodka ah ee la abuurayo dusha

Ha baqin ee su'aasha ah ee sida loo sameeyo loop dhulka ah, sababtoo ah si ay u soo ururiyaan ku dhaqanka, ma keento dhibaatooyin halis ah. In doorka divertors for grounding waxaa laga yaabaa in ku haboon xaglo bir leh width ah ee qayb ka mid ah 45 ama 60 mm, tuubooyinka ee dhexroor kala duwan. Grounding nidaamka in qaab xagal waa wanaagsan yahay, maxaa yeelay, markaan xadgudub suurto galka ah ee la xidhiidha diverter in mid ka mid ah khadadka ah, khadadka barbar weli hawl gal.

Best aduu kordhaya circuit peaty nooca ciidda carradu loamy iyo dhoobo la Heer sare ah ee qoyaan. nooca ugu xun ee ciidda - ciidda dhagax.

Waxaa lagu talinayaa in aad doorato meel gaar ah si ay u soo ururin loop dhulka, meel si mug leh la oran karo waa sida agagaarka switchgear ah. Grounding waa in la sameeyaa of Alloys copper ama bir madow ama galvanized cillaanka la'aantiis.

Majarafad qoday xabaal a qaab xagal, dhinacyada 3 mitir, si qoto dheer u yar yahay - 0.5-0.8 mitir. geesaha saddexagalka tumay earthing steel dhererka 2.5-3 m. dhammaanaysaa la afeeyey karaan in ay biraha si fudud loo dhigo dhulka. Kor dhulka xoogaa reserve, ilaa 20 cm, waxaa welded si bir siman iyaga furan, taasoo keentay in ay awoodda gaashaan korontada. Weld ma noqon doonto dhiibida in ay la tacaalaan rinjiga anti-daxalka ama, tusaale ahaan, shinida.

Ka dib markii sii kordhaya shaqeeyaan dhulka circuit cabbirka, kuna waari dhexdeeda cabbirka gacanta waxaa lagu fuliyaa ee heerka iska caabin ah ay. Taas waxa loo sameeyaa by qalabka, oo la yidhaahdo megohmmeter ah. Later soo noqnoqda cabbirka sameeyo ugu yaraan 1 mar sannadkii. Ujeedada this iyada oo qalab grounding waa in la xiro circuit la hadda macmal ah korontada, ka dibna loo sameeyo cabbirka gacanta ku dhibic danab Bannaanka. Near koronto ugu weyn ee u amro kaabayaal iyo xerto isha. Meter go'an iman kara dhow eber magnitude dhibic danab ku saabsan koronto ugu weyn. Habkani waxa uu leeyahay wareeg grounding la qiyaasay inta badan habab kale.