Yadda ake karanta ƙimar multimeter CAT: fahimta da amfani don gwada matsakaicin ƙarfin lantarki

Abubuwa

Menene ƙimar CAT na multimeter?
Daban-daban nau'ikan da ma'anar su
Yadda tsarin ƙimar multimeter CAT ke aiki
Misali na amfani da tsarin ƙimar multimeter CAT

Multimeters da sauran kayan gwajin lantarki galibi ana sanya ma'aunin ƙima. Wannan shine don baiwa mai amfani ra'ayin iyakar ƙarfin lantarki da na'urar zata iya aunawa cikin aminci. Ana gabatar da waɗannan ƙimar azaman CAT I, CAT II, CAT III, ko CAT IV. Kowane ƙima yana nuna matsakaicin matsakaicin ƙarfin lantarki don aunawa.

Menene ƙimar CAT na multimeter?

Rating Category (CAT) tsarin ne da masana'antun ke amfani da su don tantance matakin kariya da kayan lantarki ke bayarwa lokacin auna wutar lantarki. Mahimman ƙididdiga sun bambanta daga CAT I zuwa CAT IV dangane da nau'in ƙarfin lantarki da ake aunawa.

Yaushe zan yi amfani da mitoci daban-daban? Amsar ta dogara da aikin da ake yi.

Ana amfani da na'urori masu yawa a cikin manyan ayyuka da ƙarancin wutar lantarki. Misali, auna hanyar fita ko gwada kwan fitila. A cikin waɗannan lokuta, CAT I ko CAT II mita zasu iya isa. Koyaya, lokacin aiki a cikin mahalli mafi girma na ƙarfin lantarki, kamar panel breaker panel, ƙila ka buƙaci ƙarin kariya mai ƙarfi fiye da abin da daidaitaccen mita zai iya bayarwa. Anan za ku iya yin la'akari da yin amfani da sabon, mafi girman ƙimar multimeter.

Daban-daban nau'ikan da ma'anar su

Lokacin ƙoƙarin auna nauyi, akwai matakan ma'auni guda 4 da aka karɓa.

CAT I: Ana amfani da wannan galibi a cikin da'irori masu aunawa waɗanda ke da alaƙa kai tsaye da tsarin wayoyin lantarki na ginin. Misalai sun haɗa da abubuwan da ba na yanzu ba kamar fitilu, masu juyawa, na'urorin da'ira, da sauransu. Hargitsin wutar lantarki ba shi yiwuwa ko kuma ba zai yiwu ba a cikin irin wannan yanayi.

WASIKAR XNUMX: Ana amfani da wannan nau'in a cikin mahalli inda masu wucewa suka ɗan wuce ƙarfin lantarki na yau da kullun. Misalai sun haɗa da kwasfa, maɓalli, akwatunan mahaɗa, da sauransu. Girgizar wutar lantarki ba shi da yuwuwa ko da yuwuwar faruwa a waɗannan mahalli.

CAT III: Ana amfani da wannan nau'in don ma'auni da aka ɗauka kusa da tushen wutar lantarki, kamar a kan fale-falen kayan aiki da allunan sauyawa a cikin gine-gine ko wuraren masana'antu. Girgizar wutar lantarki ba shi da wuya a ƙarƙashin waɗannan yanayi. Duk da haka, suna iya faruwa tare da ƙananan yuwuwar saboda rashin aiki. (1)

Kashi na IV: Ana amfani da kayan aikin da aka haɗa cikin wannan rukunin a gefen farko na na'urar taswira mai keɓewa tare da ƙarfafan rufin da kuma ma'auni akan layukan wutar da aka shimfida a wajen gine-gine (layukan sama, igiyoyi).

Hukumar Kula da Kayan Wutar Lantarki ta Duniya (IEC) ta haɓaka matakan ƙarfi huɗu na wutar lantarki da ƙarfin filin maganadisu tare da shawarwarin gwaji na wucin gadi ga kowane.

Fasali	CAT I	CAT II	CAT III	WASIKAR XNUMX
Aiki ƙarfin lantarki	150V	150V	150V	150V
300V	300V	300V	300V
600V	600V	600V	600V
1000V	1000V	1000V	1000V
Wutar lantarki ta wucin gadi	800V	1500V	2500V	4000V
1500V	2500V	4000V	6000V
2500V	4000V	6000V	8000V
4000V	6000V	8000V	12000V
Tushen gwaji (impedance)	30 ohm	12 ohm	2 ohm	2 ohm
30 ohm	12 ohm	2 ohm	2 ohm
30 ohm	12 ohm	2 ohm	2 ohm
30 ohm	12 ohm	2 ohm	2 ohm
Aiki na yanzu	5A	12.5A	75A	75A
10A	25A	150A	150A
20A	50A	300A	300A
33.3A	83.3A	500A	500A
Matsakaicin halin yanzu	26.6A	125A	1250A	2000A
50A	208.3A	2000A	3000A
83.3A	333.3A	3000A	4000A
133.3A	500A	4000A	6000A

Yadda tsarin ƙimar multimeter CAT ke aiki

Multimeters da aka fi amfani da su a kasuwa sun faɗi kashi biyu: CAT I da CAT III. Ana amfani da CAT I multimeter don auna ƙarfin lantarki har zuwa 600V, kuma ana amfani da multimeter na CAT III har zuwa 1000V. Duk wani abu da ke sama da ke buƙatar matsayi mafi girma, kamar CAT II da IV, wanda aka tsara don 10,000V da 20,000V bi da bi.

Misali na amfani da tsarin ƙimar multimeter CAT

Ka yi tunanin cewa kana kallon panel ɗin lantarki na gidanka. Kuna buƙatar bincika wayoyi da yawa. Ana haɗa wayoyi kai tsaye zuwa babban layin wutar lantarki (240Vt). Shafa su da kuskure zai iya haifar da mummunan rauni ko mutuwa. Don ɗaukar ma'aunai cikin aminci a cikin wannan yanayin, kuna buƙatar babban ma'auni na multimeter (CAT II ko mafi kyau) wanda zai kare ku da kayan aikin ku daga lalacewa ta hanyar manyan matakan makamashi. (2)

Dubi wasu labaran mu a kasa.