Minimum values ​​of creepage distances and clearances for motor-type electrical equipment

GB14711 ya nuna cewa nisa mai rarrafe da rarrabuwar wutar lantarki na ƙananan injunan lantarki suna nufin: 1) Tsakanin masu gudanarwa da ke wucewa ta saman kayan da aka rufe da sararin samaniya. 2) Nisa tsakanin fallasa live sassa na daban-daban voltages ko tsakanin polarities daban-daban. 3) Nisa tsakanin ɓangarori masu rai da aka fallasa (ciki har da wayoyi na maganadisu) da sassan da (ko ƙila su kasance) ƙasa lokacin da motar ke aiki.Nisan creepage da izinin lantarki sun bambanta bisa ga ƙimar ƙarfin lantarki kuma yakamata su bi tanadin Teburi1.Don motoci masu ƙimar ƙarfin lantarkina 1000V da sama, da lantarki gibba tsakanin daban-daban fallasa live sassa ko sassa na daban-daban polarity a cikin junction akwatin da kuma tsakanin fallasa live sassa (ciki har da electromagnetic wayoyi) da wadanda ba na yanzu-dauke karfe ko m karfe casings da The creepage nisa kada ta kasance. kasa da bukatun da ke cikin Tebura 2.

Tebur 1Mafi ƙarancin izinin wutar lantarki da nisa mai rarrafe ƙarƙashin ƙarfin lantarki daban-daban don ɓangarorin rayuwa na injina a ƙasa1000V

kujerar gidan no	Abubuwan da ke da alaƙa	Mafi girman ƙarfin lantarki da ke ciki	Mafi ƙarancin tazara: mm
			Tsakanin dandaran abubuwan lantarki na polarities daban-daban		Tsakanin karfen da ba na yanzu da sassa masu rai		tsakanin gidajen ƙarfe masu cirewa da sassan rayuwa
			izinin lantarki	Nisa mai rarrafe	izinin lantarki	Nisa mai rarrafe	izinin lantarki	Nisa mai rarrafe
H90kuma a kasa da motoci	Tasha	31-375	6.3	6.3	3.2	6.3	3.2	6.3
	Tasha	375-750	6.3	6.3	6.3	6.3	9.8	9.8
	Sassan ban da tasha, gami da faranti da saƙon da aka haɗa da tasha	31-375	1.6	2.4	1.6	2.4	3.2	6.3
		375-750	3.2	6.3	3.2^*	6.3^*	6.3	6.3
H90ko sama da mota	Tasha	31-375	6.3	6.3	3.2	6.3	6.3	6.3
	Tasha	375-750	9.5	9.5	9.5	9.5	9.8	9.8
	Sassan ban da tasha, gami da faranti da saƙon da aka haɗa da tasha	31-375	3.2	6.3	3.2^*	6.3^*	6.3	6.3
		375-750	6.3	9.5	6.3^*	9.5^*	9.8	9.8
* Ana ɗaukar waya ta Magnet a matsayin ɓangaren rayuwa mara rufe fuska.Inda ƙarfin wutar lantarki bai wuce 375 V, mafi ƙarancin nisa na 2.4 mm ta iska ko saman yana da karɓa tsakanin wayar maganadisu, wacce ke da ƙarfi da ƙarfi kuma tana riƙe da shi akan nada, da mataccen ɓangaren ƙarfe.Inda ƙarfin lantarkin bai wuce 750V ba, ana karɓar tazara na mm 2.4 lokacin da aka yi wa coil ɗin ciki da kyau ko an lulluɓe shi.


Nisan rarrafe tsakanin na'urori masu ƙarfi (kamar diodes da thyristors a cikin akwatunan ƙarfe) da saman ƙarfe mai goyan bayan na iya zama rabin ƙimar da aka ƙayyade a cikin tebur, amma kada ta kasance ƙasa da 1.6mm.

Table 2Mafi ƙanƙancin sharewa da nisa daga rayayyun sassan injina a sama1000V a karkashin daban-daban voltages

Abubuwan da ke da alaƙa	Ƙarfin wutar lantarki: V	Mafi ƙarancin tazara: mm
		Tsakanin dandaran abubuwan lantarki na polarities daban-daban		Tsakanin karfen da ba na yanzu da sassa masu rai		tsakanin gidajen ƙarfe masu cirewa da sassan rayuwa
		izinin lantarki	Nisa mai rarrafe	izinin lantarki	Nisa mai rarrafe	izinin lantarki	Nisa mai rarrafe
Tasha	1000	11	16	11	16	11	16
	1500	13	ashirin da hudu	13	ashirin da hudu	13	ashirin da hudu
	2000	17	30	17	30	17	30
	3000	26	45	26	45	26	45
	6000	50	90	50	90	50	90
	10000	80	160	80	160	80	160
Lura 1: Lokacin da motar ta sami kuzari, saboda damuwa na inji ko na lantarki, raguwar tazara na tsayayyen sassa bai kamata ya zama sama da 10% na ƙimar daidaitacce ba.
Lura 2: Ƙimar ƙyalli na lantarki a cikin tebur yana dogara ne akan buƙatun cewa tsayin wurin aikin motar bai wuce 1000m ba. Lokacin da tsayin daka ya wuce 1000m, ƙimar sharewar wutar lantarki a cikin tebur zai ƙaru da 3% don kowane hawan 300m.
Lura 3: Don waya mai tsaka tsaki kawai, wutar lantarki mai shigowa a cikin tebur an raba ta √3
Lura 4: Ana iya rage ƙimar sharewa a cikin tebur ta amfani da ɓangarori masu rufewa, kuma ana iya tabbatar da aikin irin wannan kariyar ta jure gwajin ƙarfin lantarki.

Lokacin aikawa: Agusta-30-2023

Ƙananan dabi'u na nisa masu rarrafe da sharewa don kayan lantarki irin na mota