Kedu ihe SELV pụtara maka inye ike?

Kedu ihe SELV pụtara maka inye ike?

SELV na-anọchite anya nchekwa nchekwa ọkụ ọzọ. Fọdụ akwụkwọ ntuziaka ike-AC-DC na-ebu ịdọ aka na ntị gbasara SELV. Dịka ọmụmaatụ, enwere ike ịdọ aka na ntị banyere ijikọ mmepụta abụọ n'usoro n'ihi na volta ọkụ na-ebute elu nwere ike karịa ọkwa nchekwa SELV akọwapụtara, nke na-erughị ma ọ bụ hà 60VDC. Tụkwasị na nke a, enwere ike ịdọ aka na ntị banyere ichebe ọdụ ndị na - emepụta ihe na ndị ọzọ nwere ike ịnweta na ike ọkọnọ na mkpuchi iji gbochie ndị ọrụ na-arụ ọrụ metụrụ ha aka ma ọ bụ ihe ọghọm jiri ngwa ngwa belata, wdg.

UL 60950-1 na-ekwu na sekit SELV bụ "sekit nke abụọ nke etubere ma chebe ya na n'okpuru nsogbu ọ bụla na otu nsogbu, oke ya anaghị agabiga uru dị mma." A "sekit nke abụọ" enweghị njikọ ọ bụla na ike bụ isi (AC mains) ma na-enweta ike ya site na onye ntụgharị, onye ntụgharị ma ọ bụ ngwaọrụ iche. 

Imirikiti ọkụ ọkụ ọkụ ọkụ AC-DC dị ntakịrị na-arụpụta na 48VDC na-egbo mkpa SELV. Site na mmepụta 48V ntọala OVP nwere ike ịbụ 120% nke aha, nke ga-ekwe ka mbido ahụ ruo 57.6V tupu ike ọkụ akwụsị; nke a ka ga-ekwekọ na 60VDC kachasị maka ike SELV.

Tụkwasị na nke ahụ, a na-enweta ihe nrụpụta SELV site na mwepu eletriki ya na mkpuchi abụọ ma ọ bụ nke siri ike n'etiti isi na nke abụọ nke ndị na-agbanwe ọkụ. Ọzọkwa, iji zute nkọwa nke SELV, voltaji dị n'etiti akụkụ abụọ / ndị nduzi ọ bụla nwere ike ịnweta ma ọ bụ n'etiti otu akụkụ nwere ike ịnweta / onye na-eduzi ya na ụwa agabigaghị uru dị mma, nke akọwapụtara dị ka elu 42.4 VAC ma ọ bụ 60VDC maka karịa 200 ms n'oge nkịtị ọrụ. N'okpuru otu mmejọ ọnọdụ, a na-ahapụ ikike ndị a ka ha gaa elu na 71VAC elu ma ọ bụ 120VDC karịa 20 ms.

Ya ejula gi anya ma oburu n’ichota udiri eletriki ndi ozo nke na akowa SELV n’iru. Nkọwapụta / nkọwa ndị a dị n'elu na-ezo aka na SELV dịka UL 60950-1 kọwara ya na nkọwapụta ndị ọzọ metụtara ya gbasara obere ike ọkọnọ.


Post oge: Jul-20-2021