電纜橋架的使用在戶外一些區(qū)域使用比較頻繁，主要用于電纜的架設(shè)，它的使用有利于保護(hù)電纜，發(fā)揮的作用較大，因其使用比較廣泛，且使用場(chǎng)合不固定，出現(xiàn)了很多不同樣式的橋架類型，其中包括大跨距式、鍍鋅橋架、防火橋架等。多種樣式存在，后期在安裝時(shí)相對(duì)比較簡(jiǎn)單，那么，電纜橋架在建設(shè)時(shí)應(yīng)該從哪幾個(gè)方面入手呢?讓我們來(lái)一起看一下吧。

The use of cable tray is more frequent in some outdoor areas, which is mainly used for cable erection. Its use is conducive to the protection of the cable and plays a greater role. Because of its wide use and unfixed use, there are many different types of cable tray, including long-span, galvanized cable tray, fireproof cable tray, etc. There are many styles, and the later installation is relatively simple. So, which aspects should we start from when building the cable tray? Let's have a look.

一、支、吊架的配置

1、 Configuration of supports and hangers

1、戶內(nèi)支、吊短跨距一般采取1.5-3m。戶外立柱中跨距一般采取6m。

1. The short span of indoor support and hoisting is generally 1.5-3m. The middle span of outdoor column is generally 6m.

2、非直線段的支、吊架配置就遵循以下原則。當(dāng)橋架寬度300mm時(shí)，應(yīng)在距非直線段與直線結(jié)合處300-600m的直線段側(cè)設(shè)置一個(gè)支、吊架。當(dāng)橋架寬度300mm時(shí)，除符合下述條件外，在非直線段中部還應(yīng)增設(shè)一個(gè)支、吊架。

2. The support and hanger configuration of non-linear section follows the following principles. When the bridge width is 300 mm, a support and hanger shall be set at the side of the straight section 300-600 m away from the joint of the non-linear section and the straight section. When the bridge width is 300 mm, in addition to the following conditions, a support and hanger shall be added in the middle of the non-linear section.

3、橋架多層設(shè)置時(shí)層間的距離為200，250，300，350mm。

3. When the cable tray is set in multiple layers, the distance between layers is 200250300350mm.

4、電纜橋架直線段每隔50m應(yīng)予留伸縮縫20-30mm(金屬橋架)。

4. 20-30mm expansion joint (metal bridge) shall be reserved for the straight section of cable bridge every 50m.

二、防火

2、 Fire prevention

要求橋架防火的區(qū)段，需要采用鋼制或不燃、阻燃材料。

Steel or non combustible and flame retardant materials shall be used in the section where the bridge is required to be fireproof.

三、接地

3、 Grounding

1、橋架系統(tǒng)應(yīng)具有可靠的電氣連接并接地(只對(duì)金屬橋架)。

1. The bridge system shall have reliable electrical connection and grounding (only for metal bridge).
            

2、當(dāng)允許利用橋架系統(tǒng)構(gòu)成接地干線回路時(shí)應(yīng)符合下列要求。橋架端部之間連接電阻應(yīng)不大于0.00033歐姆，接地孔應(yīng)絕緣涂層。在1KV及以下中性點(diǎn)直接接地系統(tǒng)中，受電設(shè)備的接地與系統(tǒng)中性線接地相連。裝有處動(dòng)切斷供電裝軒時(shí)，橋架的級(jí)長(zhǎng)方向金屬橫截面積應(yīng)不小于規(guī)定值。

2. When the bridge system is allowed to form the grounding trunk circuit, the following requirements shall be met. The connection resistance between bridge ends shall not be greater than 0.00033 ohm, and the insulation coating shall be removed from the grounding hole. In the 1kV and below neutral point direct grounding system, the grounding of the receiving equipment is connected with the neutral line of the system. When installing the dynamic cut-off power supply installation, the metal cross-sectional area in the direction of the bridge length shall not be less than the specified value.

3、沿橋架全長(zhǎng)另敷設(shè)接地干線時(shí)，每段(包括非直線段)橋架應(yīng)少有一點(diǎn)與接地干線可靠連接。

3. When another grounding main line is laid along the whole length of the bridge, at least one point of each section (including non-linear section) of the bridge shall be reliably connected with the grounding main line.

4、對(duì)于振動(dòng)場(chǎng)所，在接地部位的連接處應(yīng)裝置彈簧圈。

4. For vibration place, spring coil should be installed at the connection of grounding part.

以上就是電纜橋架在建設(shè)時(shí)應(yīng)該注意的幾個(gè)方面，其中橋架在安裝時(shí)需要設(shè)置支架或者吊架，從而可以保證橋架的正確安裝，此外在進(jìn)行接地工作時(shí)也要注意接地的連接，防止影響到橋架的使用。

The above are several aspects that should be paid attention to in the construction of cable tray. The bracket or hanger should be set when the cable tray is installed, so as to ensure the correct installation of the cable tray. In addition, the grounding connection should also be paid attention to when carrying out the grounding work, so as to prevent affecting the use of the cable tray.