Safety barrier dah mai mai hian grounding i pumpelh ngam em? Heng pahnih hi Single choice zawhna zawhna an ni ngai lo!
“Cabinet Room-a Control Cables-te chu Safety Barrier hmangin Ugrounded-ah a awm thei em? Ṭhenkhat chuan "surge protection leh interference isolation atana safety barriers hmang hian control cable shielding layer-te grounding chu casual takin tih theih a ni," tiin an ngai. Cabinet room chhunga control cable shielding layer grounding hi safety barrier awmna nen a inzawm em?Vawiin hian cabinet room chhunga control cable shielding layer te grounding chungchangah engkim kan tichiang vek a ni.”
Cabinet room chhunga control cable awmte shielding layer grounding a awma bul berah chuan inrawlhna dodalna atan a thawk a ni, a hnuaia hnathawh leh thiltum bikte nen:
1. 1. A rilru a hah lutuk chuan a rilru a buai em em a.Pawn lam electromagnetic interference venna: Ground-a dah a nih chuan shielding layer chu "barrier" angin a thawk a, pawn lam electromagnetic field-in current a thlen chu leiah a hruai lut a, chu chuan interference signal cable chhunga lut tur a veng a, control signal thawn chhuah dikna a nghawng a ni.
2. 2. A rilru a hah lutuk chuan a rilru a buai em em a.Internal signal-in pawn lam thil a tihbuai loh nan: Cable chhunga signal thawn chhuah hian electromagnetic field a siam thei. Grounded shielding layer hian heng field te hi pawn lam a darh loh nan a titawp thei a, a chhehvela hmanrua te tihbuai a awm loh nan.
3. A rilru a hah lutuk chuan a rilru a buai em em a.Thil hmanrua leh mipui himna humhim: Shielding layer chu ground a nih loh chuan static buildup emaw voltage pangngai lo emaw chuan hmanrua a tichhe thei a ni. Grounding hian charge tam lutuk chu leiah a divert a, hei hian safety risk a ti tlem a ni.
Cabinet room chhunga control cable-te shielding layer-te ground-na atana standard mamawh leh kalphung pawimawh tak takte:
1. 1. A rilru a hah lutuk chuan a rilru a buai em em a.GB 50093-2013 "Automation Instrumentation Engineering-a sak leh quality pawm dan tur Code."
10.2.10 Instrument cable leh wire te shielding layer chu control room panel/cabinet lam hawiin ground tur a ni. Circuit khata shielding layer hian electrical continuity rintlak tak a nei tur a ni a, floating emaw ground-a dah nawn leh tur a ni lo.
10.2.11 Armored cable armor chu a tawp pahniha venhimna atan grounded tur a ni.
10.2.12 Intermediate junction box-ah chuan primary cable-a subdivided shielding layer-te chu a inmil secondary cable shielding layer-te chu terminal hmangin a inzawm tur a ni. Shielding layer hrang hrangte chu mixing awm lovin a hranin inzawm tur a ni a, insulated tur a ni.
10.2.13 Anti-interference mamawh a awm chuan multi-core cable-a spare core te chu hmun khatah ground tur a ni. Shielded cable tan chuan spare core leh shielding layer chu a sir khatah ground tur a ni.
2. 2. A rilru a hah lutuk chuan a rilru a buai em em a.SH/T 3081-2019 "Petroleum leh Chemical Industries-a Instrument Grounding atana Design Code".
THIL AWM DAN A
(Normative Appendix) tih a ni.
Shielded cable grounding map a ni
Overall screen division-a multi-core main cable shielding layer chu Figure A-1-a kan hmuh angin cabinet room-ah a inzawm chhunzawm zel a ni. Screen division pumpui chhunga multi-core main cable shielding layer chu segmented a ni a, Figure A-2 a kan hmuh angin junction box leh cabinet room nen a inzawm a ni. Overall screen division-a multi-core main cable shielding layer chu Figure A-3-a kan hmuh angin cabinet room-ah a inzawm chhunzawm zel a ni. Overall screen division-a multi-core main cable shielding layer chu segmented a ni a, Figure A-4-a kan hmuh angin junction box leh cabinet room-ah a inzawm a ni.
Figure A-1 atanga A-4 thlenga shielding layer atana wiring instruction te chu Table A-ah hian tarlan a ni a, field instrument atanga junction box thlenga branch cable chu shielded cable pakhat emaw armored shielded cable pakhat emaw a ni. Junction box chhunga lut armored cable te hian grounding connection awlsam tak siam nan grounding connection nei cable joint an hmang thin. Appendix Figure A-2 atanga A-4-a branch cable tinte shielding layer te chu junction box-ah terminal emaw busbar emaw hmangin inzawm khawm tur a ni.
Branch cable leh main cable-a shielding layer te hi control room cabinet-ah connect leh ground theih a ni a, section grounding junction box leh control room cabinet-ah pawh a hranin a inzawm thei bawk.
Figure A-1-a branch cable shielding layer chu main cable chhunga shielding layer-ah a inzawm a, Figure A-3-a branch cable shielding layer chu junction box chhunga main cable shielding layer-ah a inzawm bawk. Shielding layer inzawm kim chu a tawp khatah control room cabinet-ah ground a ni.
Figure A-2 leh A-4-a branch cable-te shielding layer chu junction box-a tawp khatah ground a ni a, Figure A-2-a main cable chhunga shielding layer leh Figure A-4-a main cable shielding layer chu control room cabinet-a tawp khatah ground a ni thung.
Main cable armor layer chu Article 4.4.1 angin a tawp pahnihah ground a ni a, metal cable tray chu a tawp pahnihah Article 4.1.8 angin ground a ni a, 30m danah grounding repeated a ni.
Table A Shielding Layer atana Wiring hman dan
Shielding hmanga inzawmna siam dan | Junction box ah chuan a awm | Pindan te | ||||
On-site instrument atanga junction box thlengin cable branch hrang hrang siam a ni | Total screen leh split screen atan multi core main cable a awm bawk | |||||
Figure A-1 | Shielding layer hi main cable-ah terminal hmangin a inzawm a, ground a ni lo | Armor layer emaw metal protective tube emaw chu grounding busbar-ah hian venhimna atan a inzawm a ni | Shielding layer hi branch cable shielding layer nen terminal hmangin a inzawm a, ground a ni lo | Total shielding layer chu grounding busbar hmangin protective ground nen a inzawm a ni | Shielding layer hi grounding busbar hmangin working ground nen an inzawm a ni | Total shielding layer chu grounding busbar hmangin protective ground nen a inzawm a ni |
Figure A-2 | Shielding layer hi grounding busbar hmangin protective ground nen an inzawm a ni | Armor layer emaw metal protective tube emaw chu grounding busbar-ah hian venhimna atan a inzawm a ni | Shielding layer a awm lo | Total shielding layer chu grounding busbar hmangin protective ground nen a inzawm a ni | Shielding layer hi grounding busbar hmangin working ground nen an inzawm a ni | Total shielding layer chu grounding busbar hmangin protective ground nen a inzawm a ni |
| Junction box ah chuan a awm | Pindan te | ||||
On-site instrument atanga junction box thlengin cable branch hrang hrang siam a ni | Total screen leh split screen atan multi core main cable a awm bawk | |||||
Figure A-3 | Shielding layer hi main cable-a overall shielding layer-ah terminal hmangin a inzawm a, ground a ni lo | Armor layer emaw metal protective tube emaw chu grounding busbar-ah hian venhimna atan a inzawm a ni | Shielding layer hran a awm lo | Total shielding layer hi branch cable shielding layer nen terminal hmangin a inzawm a, ground a ni lo | Shielding layer hran a awm lo | Total shielding layer chu grounding busbar hmangin working ground nen a inzawm a ni |
Figure A-4 | Shielding layer hi grounding busbar hmangin protective ground nen an inzawm a ni | Armor layer emaw metal protective tube emaw chu grounding busbar-ah hian venhimna atan a inzawm a ni | Shielding layer hran a awm lo | Shielding layer pumpui chu a ruak vek a ni | Split screen tapping layer a awm lo | Total shielding layer chu grounding busbar hmangin working ground nen a inzawm a ni |
Engineering practical application leh on-site-a nun tak tak thlalak:
Cabinet room chhunga control cable chhung lam sir a shielding layer grounding hi safety barriers (Isolation Barrier a nis, surge protector, etc.) te chu configure a ni. Design document-ah hian thil tul bik a awm loh chuan, specification angin khauh taka kalpui tur a ni.
