當(dāng)你在一個(gè)重大項(xiàng)目上安裝電源或控制線路時(shí)，是否考慮多次了?制漿造紙行業(yè)的電氣工程師就經(jīng)常遇到這種情況，通常考慮以下幾個(gè)方面：

　　Have you considered installing power or control circuits multiple times on a major project? Electrical engineers in the pulp and paper industry often encounter this situation and usually consider the following aspects:

　　1、經(jīng)濟(jì)考慮

　　1. Economic considerations

　　2、環(huán)境因素

　　2. Environmental factors

　　3、機(jī)械強(qiáng)度和耐腐蝕性

　　3. Mechanical strength and corrosion resistance

　　4、便于安裝

　　4. Easy to install

　　5、容易變更(這在短期項(xiàng)目中很重要)

　　5. Easy to change (which is important in short-term projects)

　　6、允許未來(lái)布線變動(dòng)

　　6. Allow future wiring changes

　　7、可在危險(xiǎn)場(chǎng)所使用

　　7. Can be used in hazardous areas

　　成本是大多數(shù)工程項(xiàng)目的重要因素，電纜橋架的成本通常低于其他等效的布線，這提高了電纜橋架的市場(chǎng)占有率。而穿線管具有限度地保護(hù)電路的明顯優(yōu)勢(shì)，并且在正確安裝的情況下，不會(huì)違反電氣規(guī)范。

　　Cost is an important factor in most engineering projects, and the cost of cable trays is usually lower than other equivalent wiring, which increases the market share of cable trays. The conduit has the obvious advantage of maximizing the protection of the circuit and, when installed correctly, will not violate electrical regulations.

　　電纜橋架雖然容易按照正確的方式安裝，但幾乎不能確保它會(huì)維持這種狀態(tài)。在緊急需要時(shí)，電纜橋架可能會(huì)被添加額外的電纜，導(dǎo)致電纜過(guò)多，違反了規(guī)范。

　　Although cable trays are easy to install in the correct way, it is almost impossible to guarantee that they will maintain this state. In case of emergency, additional cables may be added to the cable tray, resulting in excessive cables and violating regulations.

　　對(duì)于集中在一個(gè)區(qū)域的大量電纜的安裝，電纜橋架是一個(gè)很好的選擇，如電機(jī)控制中心室，用于集散控制系統(tǒng)的儀表架室，集中控制室等。大型電纜橋架可以離開(kāi)電機(jī)控制中心，進(jìn)入儀表和電機(jī)所在的場(chǎng)所，進(jìn)一步延伸到工作現(xiàn)場(chǎng)時(shí)可以減小尺寸。

　　For the installation of a large number of cables concentrated in one area, cable trays are a good choice, such as motor control center rooms, instrument rack rooms for distributed control systems, centralized control rooms, etc. Large cable trays can leave the motor control center and enter the area where instruments and motors are located, further reducing their size when extended to the work site.

　　電纜橋架應(yīng)安裝在物料溢出、化學(xué)品暴露及設(shè)備損壞風(fēng)險(xiǎn)小的區(qū)域，如果遭遇物品溢出，很快就會(huì)被干紙漿、黑液和各種物體堵塞，造成火災(zāi)風(fēng)險(xiǎn)。在工藝設(shè)備的維護(hù)過(guò)程中，焊接火花經(jīng)常落到紙漿上，引發(fā)電纜橋架火災(zāi)。這不是孤立的事件，在許多有電纜橋架的地方都發(fā)生過(guò)。

　　Cable trays should be installed in areas with the lowest risk of material spillage, chemical exposure, and equipment damage. If they encounter material spillage, they will quickly be blocked by dry pulp, black liquor, and various objects, posing a fire risk. During the maintenance of process equipment, welding sparks often fall onto the pulp, causing cable tray fires. This is not an isolated incident, it has occurred in many places with cable trays.

　　電纜橋架火災(zāi)產(chǎn)生的煙霧擴(kuò)散要求在垂直或水平中間位置安裝防火板，根據(jù)組合電纜和電線的廠際防火，建議電纜橋架之間的小間距不應(yīng)小于0.6m。在化學(xué)品濃度較高的區(qū)域，電纜橋架的安裝變得關(guān)重要。

　　The smoke diffusion generated by cable tray fires requires the installation of fireproof boards in the vertical or horizontal middle position. According to the inter factory fire prevention of composite cables and wires, it is recommended that the minimum spacing between cable trays should not be less than 0.6m. In areas with high chemical concentrations, the installation of cable trays becomes crucial.

　　任何不同金屬的接觸都會(huì)導(dǎo)致電解，鋼支架與鋁電纜橋架直接接觸會(huì)導(dǎo)致電纜橋架和支架都被腐蝕。玻璃纖維不易受此影響，但會(huì)增加成本。在此類惡劣環(huán)境中，使用玻璃纖維可能是除PVC穿線管之外的選擇。為幫助減輕火災(zāi)危害和化學(xué)作用，加電纜橋架蓋板可以防止紙漿、石灰粉塵、礦物質(zhì)進(jìn)入。

　　Any contact between different metals can lead to electrolysis, and direct contact between steel supports and aluminum cable trays can cause corrosion of both cable trays and supports. Fiberglass is not easily affected by this, but it will increase costs. In such harsh environments, using fiberglass may be the only option besides PVC conduit. To help reduce fire hazards and chemical reactions, adding cable tray covers can prevent pulp, lime dust, and minerals from entering.

　　安裝電纜橋架時(shí)要考慮的另一個(gè)因素是電纜橋架的機(jī)械性能，電纜橋架經(jīng)常受到操作設(shè)備(如推土機(jī)、叉車、卡車和其他重型設(shè)備)的機(jī)械危害。此外，電纜橋架還容易被誤用作腳手架平臺(tái)、工人走道和支撐管道的底座。

　　Another factor to consider when installing cable trays is the mechanical performance of the cable trays, which are often subject to mechanical hazards from operating equipment such as bulldozers, forklifts, trucks, and other heavy equipment. In addition, cable trays are also prone to misuse as scaffolding platforms, worker walkways, and bases for supporting pipelines.

　　電纜橋架中可以填充的電纜數(shù)量取決于電纜直徑和電纜橋架的截面積，《低壓配電設(shè)計(jì)規(guī)范》(GB50054-2011)中規(guī)定：電纜在電纜橋架和梯架內(nèi)敷設(shè)時(shí)，電纜總截面積與電纜橋架和梯架橫斷面面積之比，電力電纜不應(yīng)大于40%，控制電纜不應(yīng)大于50%。

　　The number of cables that can be filled in cable trays depends on the diameter of the cables and the cross-sectional area of the cable trays. According to the "Code for Design of Low Voltage Power Distribution" (GB50054-2011), when laying cables in cable trays and ladders, the ratio of the total cross-sectional area of the cables to the cross-sectional area of the cable trays and ladders should not exceed 40% for power cables and 50% for control cables.

　　維修電工把電纜拉入電纜橋架里，以保持工廠的生產(chǎn)。他不關(guān)心規(guī)范，只關(guān)心機(jī)器壞了，讓它恢復(fù)生產(chǎn)的方法是鋪設(shè)新電纜。如果電纜橋架已經(jīng)達(dá)到填充量，則電纜將放置在現(xiàn)有電纜的頂部，并違反電氣規(guī)范，這是項(xiàng)目工程師關(guān)心的問(wèn)題。

　　The maintenance electrician pulls the cable into the cable tray to maintain the factory's production. He doesn't care about regulations, he only cares about the machine breaking down, and the only way to restore production is to lay new cables. If the cable tray has reached its maximum filling capacity, the cables will be placed on top of the existing cables and violate electrical specifications, which is the most concerning issue for project engineers.

　　電纜橋架的可訪問(wèn)性往往會(huì)打開(kāi)違反規(guī)范的門，這是業(yè)內(nèi)普遍的做法。工程師通常是負(fù)責(zé)初的安裝，但一旦完成任務(wù)，就與此無(wú)關(guān)了。

　　The accessibility of cable trays often opens doors that violate regulations, which is a common practice in the industry. Engineers are usually responsible for the initial installation, but once the task is completed, it becomes irrelevant.

　　電纜橋架安裝的限制包含在電氣規(guī)范中，是在電纜橋架中正確填充電纜的要求。違反規(guī)范的情況很常見(jiàn)，設(shè)備維護(hù)人員需要意識(shí)到將額外電纜拉入現(xiàn)有電纜橋架的后果。

　　The limitations of cable tray installation are included in the electrical specifications and are the minimum requirements for correctly filling cables in cable trays. Violations of regulations are common, and equipment maintenance personnel need to be aware of the consequences of pulling additional cables into existing cable trays.

　　本文由 山東電纜橋架   友情奉獻(xiàn).更多有關(guān)的知識(shí)請(qǐng)點(diǎn)擊  http://m.ymmgjx.net/   真誠(chéng)的態(tài)度.為您提供為的服務(wù).更多有關(guān)的知識(shí)我們將會(huì)陸續(xù)向大家奉獻(xiàn).敬請(qǐng)期待.

　　This article is a friendly contribution from Shandong Cable Bridge For more related knowledge, please click http://m.ymmgjx.net/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.