Himnak khamnak thilri chiah lawngin vawlei cung hrial na ngamh maw? Hi pahnih hi thimnak pakhat lawng biahalnak biahalnak an si bal lo!

“Cabinet Khaan chung i Control Cable pawl cu Himnak Hriamnam he Vawlei ah Hrenh Loin An Um Kho Maw? Cheukhat nih cun "surge kilvennak le hnahnawhnak hrialnak caah himnak khamnak he, control cable khamnak tthen pawl vawlei ah hrennak cu a fawi tein tuah khawh a si" tiah an zumh." Sihmanhsehlaw, aa pehtlaimi phunglam nih control cabine khamnak tthen pawl vawlei hrennak caah a herhmi le tuah ningcang kha fiang tein a langhter. Cabinet khaan chunglei kam i control cable pawl i huhphenhnak tthencheunak cu himnak khamnak a ummi he aa pehtlai maw?Nihin ah, cabinet khaan chung i control cable pawl i a huhphenhnak tthen pawl vawlei ah chiahnak kong vialte kan fianter dih.”

Cabinet khaan chung i control cable pawl i huhphenhnak tthen kha vawlei ah chiahhnahnawhnak doh awkah a bik in rian a ttuan, a tanglei riantuannak le tinhmi hna he:

1.Lenglei electric magnetic hnahnawhnak khamnak: Vawlei ah a um hnu ah, huhphenhnak tthen cu "khamnak" bantuk in rian a ttuan, lenglei electric magnetic fields nih a chuahtermi current kha vawlei ah a hruai, cucaah hnahnawhnak signal pawl kha cable chungah a luhter lo i a kuatmi control signal pawl a dikthliar kha a hnorsuan.

2.Lenglei thilri hna he aa pehtlaimi chunglei thawngthanhnak khamnak: Cable chungin kuatmi thawngthanhnak nih electromagnetic fields a chuahter khawh. Vawlei ah aa hngatmi huhphenhnak nih hi hmun pawl hi lenglei ah a karh lonak hnga a kham khawh, a pawngkam thilri hna he i hnahnawhnak a hrial khawh.

3.Thilri le riantuantu himnak kilvennak: Huhphenhnak tthen cu vawlei ah aa hngat lo ahcun, aa thleng lomi a karhmi asiloah a ttha lomi voltage nih thilri riantuan ning a rawhter khawh. Vawlei ah a luan ciami thilri pawl kha vawlei ah a thlen hna i himnak caah tihnung a zorter.

Cabinet khaan chung i control cable pawl i huhphenhnak tthen pawl vawlei ah hrennak caah a biapi mi phunglam le tuahsernak hna:

1.GB 50093-2013 "Mah tein riantuannak thilri sernak le tthatnak cohlannak caah phunglam

10.2.10 Thilri hri le hri pawl i huhphenhnak tthen cu control room panel/cabinet lei ah vawlei ah hren a si lai. Circuit pakhat i a huhphenhnak tthen cu zumhawktlak electric pehzulh khawhnak a ngei lai i a luangmi asiloah vawlei ah a ummi a si lai lo.

10.2.11 Ralthuam hri hna cu a donghnak pahnih ah huhphenhnak caah vawlei ah an hngat lai.

10.2.12 A karlak i pehtlaihnak bawm hna ah, a hrampi cable i a tthencheu mi huhphenhnak tthen pawl cu aa pehtlaimi a pahnihnak cable huhphenhnak tthen pawl he terminal hmangin pehtlaih an si lai. Aa dangmi huhphenhnak tthen pawl cu cawh loin a dang tein pehtlaih an si lai i an i thup lai.

10.2.13 Hnawhchannak doh a herhmi a um tikah, multi-core cable chung i a dang core pawl cu hmunkhat te ah vawlei ah an hren hna lai. A huhphenhmi hri caah cun, a dang core le a huhphenhmi tthen cu khatlei ah vawlei ah an chiah lai.

2.SH/T 3081-2019 "Petroleum le Chemical Industries ah Instrument Grounding caah Design Code"

APPENDIX A

(Normative Appendix)

A huhphenhmi cable vawlei cung map

Screen tthennak dihlak ah multi-core main cable i a huhphenhnak tthen cu hmanthlak A-1 ah hmuh khawhmi bantukin cabinet khaan he pehzulh tein aa pehtlai. Screen tthennak dihlak ah multi-core main cable i a huhphenhnak tthen cu tthencheu a si i hmanthlak A-2 ah langhtermi bantuk in junction box le cabinet khaan he aa pehtlaih. Screen tthennak dihlak ah multi-core main cable i a huhphenhnak tthen cu hmanthlak A-3 ah hmuh khawhmi bantukin cabinet khaan he pehzulh tein aa pehtlai. Screen tthennak dihlak ah multi-core main cable i a huhphenhnak tthen cu tthencheu a si i hmanthlak A-4 ah langhtermi bantuk in junction box le cabinet khaan he pehtlaih a si.

Hmanthlak A-1 in A-4 tiang i huhphenhnak tthen caah hri hrennak lamhruainak cu Table A ah hmuh khawh a si. Field instrument in junction box tiang branch cable cu huhphenhnak hri pakhat asiloah huhphenhnak hri pakhat lawng a si. Junction box chung a lutmi ralthuam hri hna nih fawi tein vawlei pehtlaihnak caah vawlei pehtlaihnak he cable pehtlaihnak an hman. Appendix Figures A-2 in A-4 tiang ah a ummi branch cable pakhat cio i a huhphenhnak tthen pawl cu terminal asiloah busbar hmangin junction box ah pehtlaih an si lai.

Branch cable le main cable pawl i huhphenhnak tthen pawl cu control room cabinet ah pehtlaih khawh le vawlei ah hren khawh an si, asiloah a dang tein junction box le control room cabinet ah section vawlei ah hren khawh an si.

Hmanthlak A-1 chung i zung ṭengnge hri i a huhphenhnak tthen cu hri nganpi chunglei huhphenhnak tthen he aa pehtlai, cun hmanthlak A-3 chung i zung hri hri i huhphenhnak tthen cu junction box chung i hri nganpi i huhphenhnak tthen he aa pehtlai. A tlingmi aa pehtlaimi huhphenhnak tthen cu a donghnak ah control room cabinet ah vawlei ah a um.

Hmanthlak A-2 le A-4 chung i zung ṭengnge hri hna i huhphenhnak tthen cu junction box chung i a donghnak pakhat ah vawlei ah an hren, cu lioah hmanthlak A-2 chung i hri nganpi chunglei huhphenhnak tthen le Hmanthlak A-4 chung i hri ngan bik i huhphenhnak tthen cu control room cabinet chung i a donghnak pakhat ah hren an si.

Article 4.4.1 ningin a tlangpi cable i a ralthuam tthen cu a donghnak pahnih ah vawlei ah hren a si, cun thir hri chiahnak kuang cu Article 4.1.8 ningin a donghnak pahnih ah hren a si, 30m hnu ah vawlei ah hren tthan a si.

Table A Hrialnak Layer caah Wiring Lam

Engineering hman khawhmi hmannak le hmunhma ah nunnak taktak hmanthlak:

Cabinet khaan chung i control cable chunglei kam i a ummi huhphenhnak tthen cu himnak khamnak (I thennak khamnaks, surge kilvennak, tbk.) cu an i remh. Design cauk ah a hleiin herhmi a um lo ahcun, a hleiin a ummi ningin fek tein tuah a hau.