huahana

Nā FTA Nonincendive (ka palena o kēia manawa) ʻO kekahi o ka Field Termination Assemblies (FTAs) i hoʻohana ʻia ma ka subsystem High-Performance Process Manager he mau mea kū'ē i nā kaʻa kaʻa e hoʻopaʻa i ka manawa i loaʻa i nā terminals kahua. Ua nānā ʻia a hōʻoia ʻia kēia mau kaapuni puka e Factory Mutual ma ke ʻano he Nonincendive. 'O ia ho'i, inā wehe 'ia nā uwea kahua, pōkole, a ho'opa'a 'ia a ke hana ma'amau nei ka HPM, 'a'ole e ho'oku'u ka uwea i ka ikehu e ho'ā ai i loko o ka lewa ahi. ʻO ka papa 5-3 he papa inoa o ka hoʻokomo analog, ka hoʻopuka analog, a me nā FTA hoʻokomo kikohoʻe i loaʻa nā huahana Nonincendive. Eia nō hoʻi, inā he mau kaapuni puka kikohoʻe o kahi FTA puka kikohoʻe i kēia manawa a kaupalena ʻia ka uila i nā pae kūpono e ka mea hoʻohana, hiki ke manaʻo ʻia ka FTA puka kikohoʻe Nonincendive. Uea a me nā palena ukana (entity parameters) No ka hōʻoia ʻana ʻaʻole hiki i nā kaapuni kahua ke hoʻā i kahi mahu i ʻike ʻia, pono e ʻike a mālama ʻia ka nui o ke kaula a me ka ukana. Hāʻawi ka Papa 5-3 i nā koina i ʻae ʻia o nā ʻāpana no kēlā me kēia FTA i helu ʻia ma ka papa. ʻAe ʻia ke code uila Ma ke ʻano laulā, pono e hana ʻia nā uea kahua ma ka Mokuna 2 i nā wahi pōʻino e like me nā code kūloko; akā naʻe, ma kekahi mau ʻāina, ʻaʻole pono nā uea Nonincendive i nā lula wili maʻamau ʻo Division 2, akā hiki ke hoʻohana i nā ʻano uea i kūpono i nā wahi maʻamau. E ʻike i ka ANSI/ISA S12.12, ka ʻāpana "Nā Mea Uila No ka Hoʻohana ʻana ma ka Papa I, Mahele 2 Hazardous [Classified] Wahi." Ua koho ʻia ka waiwai o nā mea pale ma nā FTA i helu ʻia no ka hōʻoia ʻana i nā au o ke kaʻapuni pōkole ma kahi pōʻino ma lalo o 150 milliamps no nā lako hana maʻamau. Wahi a ka NFPA paʻi #493, Intrinsically Safe Apparatus for Use in Division 1 Hazardous Locations, 150 milliamps mai kahi kumu 24 Vdc aia ma lalo o ka paepae hoʻāla i loko o kahi kaapuni kūʻē no nā kinoea ma nā hui A a hiki i D.