Ground-fault circuit interrupters (GFCIs) yave ichishandiswa kwemakore anopfuura 40, uye yakaratidza kuti inokosha mukuchengetedzwa kwevashandi kubva mungozi yekuvhunduka kwemagetsi.Mamwe marudzi ekubvinza azvino uye epasi ekudzivirira ekudzivirira akaunzwa kune akasiyana maapplication kubva pakaunzwa GFCIs.Kushandiswa kwezvimwe zvidziviriro zvekudzivirira kunodiwa chaizvo muNational Electrical Code® (NEC)®.Zvimwewo chikamu chemudziyo, sezvinodiwa neUL chiyero chinovhara mudziyo uyu.Ichi chinyorwa chichabatsira kusiyanisa marudzi akasiyana-siyana emidziyo yekudzivirira inoshandiswa nhasi uye kujekesa mashandisiro avanoda.
Iyo GFCI
Tsanangudzo yepasi-fault circuit interrupter iri muChinyorwa 100 cheNEC uye ndeiyi: “Chishandiso chakagadzirirwa kuchengetedza vashandi chinoshanda kubvisa simba redunhu kana chikamu chayo mukati menguva yakatarwa apo ikozvino kusvika pasi inodarika kukosha kwakadzikwa kumudziyo weKirasi A."
Kutevera tsananguro iyi, Ruzivo Rweruzivo runopa rumwe ruzivo rwekuti chii chinoumba Kirasi A GFCI mudziyo.Inotaura kuti Kirasi A GFCI inofamba kana ikozvino kusvika pasi ine kukosha muhuwandu hwe4 milliamps kusvika 6 milliamps, uye mareferensi UL 943, iyo Standard for Safety for Ground- Fault Circuit-Interrupters.
Chikamu 210.8 cheNEC chinobata zvakanangana nezvikumbiro, zvese zvekugara uye zvekutengesa, uko kuchengetedzwa kweGFCI kwevashandi kunodiwa.Mudzimba dzekugara, maGFCI anodiwa mune ese 125-volt, single phase, 15- uye 20-ampere receptacles yakaiswa munzvimbo dzakaita sedzimba dzekugezera, magaraji, kunze, dzimba dzepasi dzisina kupera, uye makicheni.Chinyorwa 680 cheNEC chinovhara madziva ekushambira chine zvimwe zveGFCI zvinodiwa.
Munenge chinyorwa chega chega cheNEC kubvira 1968, zvitsva zveGFCI zvakawedzerwa.Ona tafura iri pazasi yemienzaniso yenguva iyo NEC yakatanga kuda maGFCI ekushandisa kwakasiyana.Ndokumbira utarise kuti rondedzero iyi haisanganisi nzvimbo dzese dzinodiwa kuchengetedza GFCI.
UL Guide Ruzivo rweGround-Fault Circuit Interrupters (KCXS) inogona kuwanikwa muUL Chigadzirwa iQ™.
Mamwe Marudzi eKudonha Kwezvino uye Ground Fault Dziviriro Zvishandiso:
GFPE (Ground-Fault Protection of Equipment) -Inoitirwa kuchengetedzwa kwemidziyo nekubvisa maconductor ese asina kuvhurika edunhu pamatanho azvino ari pasi peayo edhipatimendi redhipatimendi rekudzivirira rinopfuura.Rudzi urwu rwechishandiso chakagadzirwa kuti rifambe mu30 mA kana yepamusoro renji, uye nekudaro harishandiswe kuchengetedza vashandi.
Mhando yemudziyo uyu inogona kupihwa sezvinodiwa neNEC Zvikamu 210.13, 240.13, 230.95, uye 555.3.UL gwara ruzivo rweGround-Fault Sensing uye Relay Equipment inogona kuwanikwa pasi pe UL Chigadzirwa Chikamu KDAX.
LCDI (Leakage Current Detector Interrupter) LCDI's inobvumidzwa kune imwe-phase tambo- uye plug-yakabatana mukamuri maair conditioner maererano neSection 440.65 yeNEC.LCDI magetsi emagetsi emagetsi emagetsi anoshandisa tambo yakakosha inoshandisa nhovo yakatenderedza makondakita ega ega, uye akagadzirirwa kukanganisa dunhu kana kubuda kwemvura kunoitika pakati pekondukita nenhoo.UL dhairekitori ruzivo rweLeakage-Yazvino Kuonekwa uye Kukanganisa inogona kuwanikwa pasi pe UL Chigadzirwa Chikamu ELGN.
EGFPD (Equipment Ground-Fault Protective Device) - Yakagadzirirwa zvikumbiro zvakadai seyakagadziriswa magetsi deicing uye chando chinonyunguduka midziyo, pamwe chete nemagetsi emagetsi ekupisa emidziyo yepombi nemidziyo, maererano neChinyorwa 426 uye 427 muNEC.Chishandiso ichi chinoshanda kudzima dhizaini yemagetsi kubva kunobva kugovera kana pasi-fault ikozvino yadarika yepasi- fault pick-up level yakanyorwa pachishandiso, kazhinji 6 mA kusvika 50 mA.UL gwara ruzivo rweGround-Fault Dziviriro Zvishandiso inogona kuwanikwa pasi pe UL Chigadzirwa Chikamu FTTE.
ALCIs uye IDCIs
Midziyo iyi ndeye UL Chikamu Chinozivikanwa, uye haina kuitirwa kutengeswa kana kushandiswa.Izvo zvakagadzirirwa kushandiswa sefekitari-yakaunganidzwa zvikamu zvemidziyo chaiyo uko iko kukodzera kwekuiswa kunotemwa neUL.Havana kuongororwa kuti vaise mumunda, uye vanogona kana kusagutsa zvinodiwa muNEC.
ALCI (Appliance Leakage Current Interrupter) - Chigadzirwa chechikamu pamagetsi emagetsi, ALCIs akafanana neGFCIs, sezvo akagadzirirwa kuvhiringidza dunhu kana pasi pasi rinopfuura 6 mA.Iyo ALCI haina kuitirwa kutsiva kushandiswa kweGFCI mudziyo, uko kuchengetedzwa kweGFCI kunodiwa zvinoenderana neNEC.
IDCI (Immersion Detection Circuit Interrupter) - Chishandiso chechikamu chinokanganisa dunhu rekupa kune chakanyudzwa mudziyo.Kana iyo conductive fluid ichipinda mumudziyo uye inobata zvese zviri zviviri chikamu mhenyu uye yemukati sensor, chishandiso chinofamba kana kuyerera kwazvino pakati pechikamu chipenyu uye sensor inodarika rwendo rwazvino kukosha.Rwendo rwazvino runogona kuve chero kukosha pasi pe6 mA yakakwana kuona kunyudzwa kwemudziyo wakabatana.Basa reIDCI harina kutsamira pakuvapo kwechinhu chakadzikwa.
Nguva yekutumira: Sep-05-2022