Din da ya yi magana a kan, ba shi da kyau a kan Standard Breaker na iya kula cewa yake daidaitocewa a kan Ground Faults?

A cikin kabilan da ake amfani da wani babban breaker, ya shafi fuskantar jirgin ruwa saboda ake amfani da wani babban breaker ba ake tattauna ko ake bincike wannan jerigi. A kan babban breaker ba ake gina masu tsari don in tattaune masu tsari na wurin daga hoton. Babban circuit breakers suna gina masu tsari don in tattaune masu karfi da kuma kafuwarsa, ba ground faults.

Babban breakers sun tattaune masu tsari a kan jerigi na hot wire da suka ciya bayan an yi tsari a kan rating na breaker—wanda yana nuna ne domin karfin da kuma kafuwarsa. Amma, idan jerigi na neutral ta kashe, zai iya samun karfin da za a yi tsari a kan ground wire. Wannan yana faruwa saboda ake sanya ground terminal da neutral terminal a cikin main panel.

Saboda haka, zai iya samun masu tsari na biyu a kan circuit a cikin tsarin da ba a yi lura. Idan ba a samu masu tsari mai yawa a kan hot wire, ba ake tattaune fault da ba ake ciya bayar. Saboda haka, abubuwa masu circuit zai dace da energy, wanda yake da shiga fuskantar jirgin ruwa da ba ake tattaune a kan breaker.

Abubuwa masu tsari mafi yawan da ake samu a cikin circuit na sharhi:
Karfin da Kafuwarsa

Babban breakers sun ciya bayar idan an samu masu tsari mai yawa saboda karfin ko kafuwarsa (faults mai yawan tsari inda tsari yana yi tsari daga hot zuwa neutral ko hot zuwa hot). Wannan halayen suna da masu tsari mai yawa, wanda babban breaker yana tattaune da ciya bayar don in bincike abinci.

Ground Faults

Ground fault yana faruwa idan tsari yana yi tsari daga hot wire zuwa wani wurin da ake sanya ground, tare da jerigi na neutral (kamar idan neutral ta kashe ko idan live wire yana yi contact da metal appliance case ko wet surface). Ground faults ba zai iya samun masu tsari mai yawa da ke ciya bayar a kan babban breaker, musamman idan tsari mai kadan yana yi tsari zuwa ground. Wannan leakage zai iya shafi fuskantar jirgin ruwa ba tare da bambanta a kan trip threshold na breaker.

Yadda Yake Ciya Bayar a Kan Short Circuit ko Ground Fault?

Ina bukata in tuntubi yadda babban breaker yake ciya bayar da kuma yadda yake tattaune short circuits ko ground faults a cikin circuit, kamar yadda ake bayyana a cikin bayanan.

Ina bukata misali: A cikin 120V/240V main panel, lighting circuit yana kontrola da ake bincike da 15-amp standard breaker a kan 120V supply, da neutral connection ta kashe.

Kamar yadda ake bayyana a cikin bayanan, idan neutral bar a cikin main panel ta kashe, return current yana bukatar da ita a yi tsari zuwa neutral bar. Saboda neutral bar ake sanya da ground bar, ita ce yadda tsari yake yi tsari zuwa source (muhimman tashe transformer). Wannan yana da ita a yi tsari, tare da approximately 2.4 amps of fault current. Light bulb yana iya haɗa aiki a cikin raba.

Wannan 2.4-amp fault current yana da ita a cikin 15-amp rating na breaker, saboda haka, ba ake ciya bayar. Saboda haka, circuit yana da shiga fuskantar jirgin ruwa, saboda abubuwan da suka dace da energy—guda equipment enclosures, metal raceways, da metallic bodies na connected devices—suna dace da approximately 72V AC.

Idan a duba wasu, inda neutral ta kashe da hot wire yana yi contact da metallic body na device, wanda yake da shiga "double fault." A cikin wannan halaye, light ta kashe saboda rashin load resistance. Kamar yadda ake bayyana a cikin bayanan, fault current da yake approximately 4 amps yana yi tsari a kan ground conductor zuwa source.

Duk da haka, abubuwan da suka dace da energy a cikin circuit suna dace da 120V AC. Wannan 4-amp fault current yana da ita a cikin 15-amp threshold na breaker, saboda haka, ba ake ciya bayar. Idan operator yana yi contact da equipment enclosure, metal raceway, ko metallic body na device, yana iya shafi fuskantar jirgin ruwa mai yawa.

Don in bincike wannan abinci, ana fi sani da GFCI (Ground Fault Circuit Interrupter) breaker domin babban breaker. GFCI breakers suna gina masu tsari don in tattaune ground faults da ciya bayar a cikin halayen da suka da shiga fuskantar jirgin ruwa—inkluzi those caused by a broken neutral—don in bincike aiki mai kyau.