So wunya akokoduru kwati sɛ wobɛkɔ fam denam ahobammɔ akwanside ahorow a wode besisi hɔ ara kwa so? Saa abien yi nyɛ Single choice question questions da!

"So Control Cables a Ɛwɔ Cabinet Room no Betumi Akɔ so Akura Fam a Ahobammɔ Akwanside Ahorow? Ebinom gye di sɛ "sɛ wɔde ahobammɔ akwanside ahorow ma surge ahobammɔ ne interference isolation a, wobetumi ayɛ control cable shielding layers a wɔde grounding no wɔ ɔkwan a ɛnyɛ aniberesɛm so. " Nanso, gyinapɛn ahorow a ɛfa ho no kyerɛ ahwehwɛde ne akwan a wɔfa so de shielding layers a ɛwɔ control cables a ɛwɔ cabinet dan no mu no pefee. So nhama a wɔde di dwuma a ɛbɔ ho ban a ɛwɔ kabinet dan no fã a ɛwɔ dan no mu no a wɔde si fam no ne ahobammɔ akwanside ahorow a ɛwɔ hɔ no wɔ abusuabɔ?Ɛnnɛ, yɛma biribiara mu da hɔ a ɛfa nhama a wɔde di dwuma a ɛbɔ ho ban a ɛwɔ kabinet dan no mu no so.”

Grounding a shielding layer a control cables wɔ cabinet dan no mutitiriw no, ɛsom sɛ ɛbɛko atia ntwitwiridii, a ɛwɔ dwumadi ne atirimpɔw pɔtee a edidi so yi:

1. 1. Nnipa a wɔte saa.Abɔnten so anyinam ahoɔden a wɔde siw ano: Sɛ wɔde si fam wie a, ade a ɛbɔ ho ban no yɛ adwuma te sɛ "akwanside," na ɛkyerɛ anyinam ahoɔden a abɔnten so anyinam ahoɔden de ba no kwan kɔ asase no so, na ɛnam so siw ntwitwiridii nsɛnkyerɛnne kwan sɛ ɛbɛkɔ nhama no mu na ɛka sɛnea nsɛnkyerɛnne a wɔde di dwuma a wɔde mena no yɛ pɛpɛɛpɛ.

2. 2. .Nsɛnkyerɛnne a ɛwɔ mu a wobesiw ano sɛ ɛrenhaw mfiri a ɛwɔ akyi: Nsɛnkyerɛnne a wɔde mena wɔ nhama no mu no betumi ama anyinam ahoɔden aba. Nneɛma a wɔde bɔ ho ban a wɔde ahyɛ fam betumi asiw saa mfuw yi ano na antrɛw akɔ abɔnten, na amma nnwinnade a atwa ho ahyia no ntwitware.

3. 3. .Nnwinnade ne adwumayɛfo ahobammɔ a wɔbɔ ho ban: Sɛ wɔamfa shielding layer no anhyɛ asase so a, static buildup anaa voltages a ɛnteɛ betumi ama mfiri no anyɛ adwuma yiye. Grounding dan charges a ɛboro so no kɔ asase so, na ɛtew ahobammɔ ho asiane ahorow so.

Titiriw gyinapɛn ahwehwɛde ne nneyɛe a wɔde grounding shielding layers a control cables wɔ cabinet dan no mu:

1. 1. Nnipa a wɔte saa.GB 50093-2013 "Mmara a ɛfa adansi ne su pa a wogye tom wɔ Automation Instrumentation Engineering ho."

10.2.10 Ɛsɛ sɛ wɔde nnwinnadeɛ nhama ne nhama a ɛbɔ ho ban no si fam wɔ control room panel/cabinet afã. Ɛsɛ sɛ circuit koro no ara shielding layer no nya anyinam ahoɔden a wotumi de ho to so a ɛkɔ so na ɛnsɛ sɛ wogyaw no ma ɛsensɛn nsu so anaasɛ wɔmfa nsi fam mpɛn pii.

10.2.11 Wɔde akodeɛ a ɛwɔ akodeɛ nhama mu no bɛto fam ama ahobanbɔ wɔ n’awieɛ mmienu no nyinaa.

10.2.12 Wɔ ntam nkitahodi nnaka mu no, ɛsɛ sɛ wɔde nhama a ɛwɔ ntam a wɔakyekyɛ mu no bata nhama a ɛto so abien a ɛbɔ ho ban a ɛne no hyia no ho denam nhama a wɔde di dwuma no so. Ɛsɛ sɛ wɔde shielding layers ahorow bom wɔ ɔkwan soronko so a wɔmfa nfrafra na ɛsɛ sɛ wɔde insulated.

10.2.13 Sɛ ahwehwɛdeɛ a ɛko tia ntwitwiridii wɔ hɔ a, ɛsɛ sɛ wɔde spare cores a ɛwɔ multi-core cables mu no si asase so wɔ beaeɛ baako. Wɔ nhama a wɔabɔ ho ban ho no, ɛsɛ sɛ wɔde spare cores ne shielding layer no gu fam wɔ ɔfã koro.

2. 2. .SH/T 3081-2019 "Design Code a ɛfa Instrument Grounding wɔ Petroleum ne Nnuruyɛ Nnwuma mu".

NKYEKYƐMU A

(Nkyekyɛm a Ɛfa Mmara Ho) .

Shielded cable asase mfonini

Wɔde multi-core main cable a ɛwɔ screen division no nyinaa mu no shielding layer no kɔ so bata cabinet dan no ho sɛnea wɔakyerɛ wɔ Mfonini A-1 mu no. Wɔakyekyɛ multi-core main cable no shielding layer a ɛwɔ screen division no nyinaa mu no mu na wɔde abɔ junction box ne cabinet room no ho sɛnea wɔakyerɛ wɔ Mfonini A-2 mu no. Wɔde multi-core main cable a ɛwɔ screen division no nyinaa mu no shielding layer no kɔ so bata cabinet dan no ho sɛnea wɔakyerɛ wɔ Mfonini A-3 mu no. Wɔakyekyɛ multi-core main cable no shielding layer a ɛwɔ screen division no nyinaa mu no mu na wɔde abɔ junction box ne cabinet room no ho sɛnea wɔakyerɛ wɔ Mfonini A-4 mu no.

Wiring akwankyerɛ a ɛfa shielding layer ho wɔ Mfonini A-1 kɔsi A-4 no wɔakyerɛ wɔ Table A. Nkorabata cable a ɛfiri field instrument no mu kɔ junction box no yɛ shielded cable baako anaa armoured shielded cable baako. Nhama a wɔde akode ahyɛ mu a ɛhyɛn junction box no mu no de cable joints a ɛwɔ grounding connections di dwuma ma grounding connections a ɛyɛ mmerɛw. Ɛsɛ sɛ wɔde nkorabata nhama biara a ɛbɔ ho ban wɔ Nkyekyɛm Mfonini A-2 kosi A-4 no bom wɔ nhyiam adaka no mu denam terminals anaa busbars so.

Wobetumi de nkorabata nhama ne nhama atitiriw a ɛbɔ ho ban no abɔ mu na wɔde ahyɛ asase so wɔ control room cabinet no so, anaasɛ wɔtew ne ho wɔ junction box ne control room cabinet a ɛde ɔfã no yɛ fam no.

Wɔde nkorabata nhama a ɛwɔ Mfonini A-1 mu a ɛbɔ ho ban no bata nhama titiriw no mu kyɛm a ɛwɔ mu no ho, na nkorabata nhama a ɛwɔ Mfonini A-3 no mu a ɛbɔ ho ban no bata nhama titiriw a ɛwɔ nkitahodi adaka no mu no ho. Wɔde shielding layer a ɛka bom koraa no asisi asase so wɔ control room cabinet a ɛwɔ n’awiei biako no so.

Wɔde nkorabata nhama a ɛwɔ Mfonini A-2 ne A-4 mu no ho banbɔ fã no ahyɛ fam wɔ awiei biako wɔ nhyiam adaka no mu, bere a wɔde nhama titiriw a ɛwɔ Mfonini A-2 mu no mu kyɛm a ɛbɔ ho ban ne nhama titiriw a ɛwɔ Mfonini A-4 mu no ho ban no ahyɛ fam wɔ awiei biako wɔ control room cabinet no mu.

Wɔde akodeɛ a ɛwɔ nhama titire no mu no ahyɛ fam wɔ n’awieɛ mmienu no nyinaa sɛdeɛ Ahyɛdeɛ 4.4.1 kyerɛ no, na wɔde dadeɛ nhama tray no ahyɛ n’awieɛ mmienu no nyinaa sɛdeɛ Ahyɛdeɛ 4.1.8 kyerɛ no, na wɔde ahyɛ fam mpɛn pii wɔ mita 30 biara mu.

Table A Wiring Ɔkwan a Wɔfa so Yɛ Shielding Layer

Engineering a mfaso wɔ so a wɔde di dwuma ne asetra mu mfonini ahorow a ɛwɔ beae hɔ ankasa:

Grounding a shielding layer a ɛwɔ mu fã a ɛwɔ control cable no mu wɔ cabinet dan no mu no nni abusuabɔ biara ne sɛ ebia ahobammɔ akwanside ahorow (Akwanside a Ɛma Nnipa Tew Wɔn Hos, surge protectors, ne nea ɛkeka ho) na wɔahyehyɛ. Gye sɛ ahwehwɛde titiriw bi wɔ nhyehyɛe ho nkrataa no mu, ɛsɛ sɛ wɔde di dwuma katee sɛnea wɔakyerɛ no.