Wonke umntu mhlawumbi uqhelene neemitha zamandla ombane. Kule mihla, iimitha ezihlakaniphile zihlala zisetyenziselwa ukulinganisa kunye nokuhlawula umbane wasekhaya. Ukuba ujonga ngokusondeleyo, uya kufumanisa ukuba kukho iparameter 5 (60) ebhalwe kwindawo ebalaseleyo yomitha wamandla ombane.

Umzekelo, iparameter ekwisangqa esibomvu kumfanekiso ongasentla: 5 (60) A. Xa sijonga iyunithi, siyazi ukuba ibhaliwe njengangoku, ngoko ke yintoni ubudlelwane phakathi kwale misinga mibini? Kwenzeka ntoni xa umsinga ugqithisiwe? Makhe sithethe malunga nokuba imisinga emibini ibhekisa kwintoni ngokwezibiyeli zangaphandle (5) nangaphakathi kwizibiyeli (60).
Ngoku kwizibiyeli
Ikhoyo ngoku kwi-parentheses - i-60A kumzekelo, ibhekisela kumlinganiselo ophezulu wangoku wemitha yamandla. Ukwahluke kwezinye izixhobo, umbane olinganisiweyo wemitha yamandla ombane uchaphazeleka kakhulu yimiba yokusingqongileyo, ngoko ke umda othile ushiywe ngokubanzi xa uphuma kwifektri - eyona nto iphezulu ikhoyo ngoku i-120% ye-current marked current. Ngoko ke, ukuba inani elikwi-parentheses liyi-60, ubuninzi bayo obuyi-72A-ukuba akusiyo indawo enzima kakhulu, impembelelo kumlinganiselo ophezulu wangoku awuyi kufikelela kwi-20%. Ngoko ke, ubuninzi obulinganisiweyo bangoku bemitha ephawulwe nge-60A ngokuqhelekileyo malunga ne-66A ekusetyenzisweni kwangempela.
Kwenzeka ntoni xa eli xabiso ligqithisiwe? Impendulo yimilinganiselo engachanekanga - mhlawumbi ngaphezulu, mhlawumbi ngaphantsi.
Izibiyeli zangaphandle zangoku
U-5 ngaphandle kwezibiyeli apha ubizwa ngokuba yi-basic current, ikwabizwa ngokuba yi-calibration current. Kuchongwa ngokuqala kombane wamandla ombane - ixabiso elincinci langoku elivumela ukuba imitha yombane iqhubeke ijikeleza kwaye ilinganise ngokuqhubekayo. Isiqalo somjelo wemitha ye-smart jikelele yi-0.4% yangoku okalisiweyo. Oko kukuthi, imitha ene-current rated current ye-5A iya kuhlawuliswa nje ngokuba i-current in the circuit ifikelela kwi-0.02A xa isetyenziswa. Kuya kubakho umlinganiselo phakathi kwangoku owenziweyo kunye nowona mgangatho uphezulu, njenge-5 (60) A, ubudlelwane obuphindwe ka-4. Lo mlinganiselo ubizwa ngokuba “ngububanzi bomthwalo”. Ngokuqhelekileyo, kukho amaxesha ama-2, amaxesha ama-4, amaxesha angama-6, amaxesha angama-8 okanye nangaphezulu kwamaxesha alishumi - ubukhulu bobubanzi bomthwalo, bomelele kwinqanaba lobugcisa elifunekayo, kwaye ixabiso lemitha liya kuba phezulu ngokwendalo.
Ngoko ke, amanani angaphandle kwama-parentheses anento encinci yokwenza kunye nokusetyenziswa kwangempela ngumsebenzisi-ngaphezulu okanye ngaphantsi kweli xabiso aliyi kuchaphazela ukulinganisa kwemitha. Kukho imiba emibini echaphazelekayo kwi-calibration current: ixabiso lemitha (enxulumene nobubanzi bomthwalo) kunye nesiqalo sangoku (ibalwe ngumbane wokulinganisa).