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低压电抗器安装应注意的事项

去年以来,在低压柜中安装电抗器的产品越来越多,但安装的是否合理却往往得不到重视,现在就电抗器安装谈谈自己的看法。
Since last year, more and more products have been installed in low voltage cabinets, but the installation is reasonable, but they are often ignored. Now, talk about the reactor installation.
山东变压器http://www.jnwdsh.com首先让我们回顾一年来电抗器安装过程出现的问题。去年生产的某合同中多台电容柜,安装电抗器后全部出现安装撑严重下弯现象,造成这一问题的主要原因是安装撑结构不合理以致强度不够,经过对安装撑再次设计、重新加工、车间拆除、二次安装后方才解决,而且拆下的安装撑因钻孔后都不能使用,造成不必要的浪费通过对以上问题的总结分析研究认为,在低压电抗器安装设计过程中应注意以下事项:
First of all, let's review the problems in the installation of the call register during the year. A plurality of capacitors in the production of a contract last year, after the installation of supporting the installation of reactors all serious bending phenomenon, the main reason for this problem is the installation of supporting structure is not reasonable so that the strength is not enough, after the installation of supporting again design, re processing, workshop demolition, two installation only after solving, and remove the install support for drilling can cause unnecessary waste, based on the above summary of the problem research, in the design process of low voltage reactor installation should pay attention to the following items:
1.首先考虑电抗器的体积、重量、规格、数量及安装方式。
1. first of all, consider the reactor volume, weight, specifications, quantity and installation methods.
2.电抗器安装撑要有足够的强度,通常情况下,应使用槽板,尽量不使用角钢。槽板应设计为高60mm、折边30mm,用2.5mm厚的镀锌板。
2. reactor mounting should have enough strength, usually should use the groove plate, try not to use angle iron. The groove plate shall be designed with high 60mm and hem 30mm, with 2.5mm thick galvanized sheet.
3.特殊规格的电抗器应按特殊情况单独设计,考虑减小或增大槽板尺寸。
3. special specifications of the reactor shall be designed separately according to special conditions, taking into account the reduction or increase of the size of the channel plate.
4.安装必须牢固且与其它元器件间要留有一定散热间隙,要保证足够的电气间隙,还应考虑接线方便。
4., the installation must be solid, and with other components to leave a certain heat clearance, it is necessary to ensure adequate electrical clearance, wiring should also consider convenience.
山东变压器
变频器使用电抗器应如何选择?下面从额定交流电流的选择、电压降、电感量的选择、对应额定电流的电感量与电缆长度等方面进行分析。
How should the frequency converter use reactor? The following aspects are analyzed from the selection of rated AC current, the selection of voltage drop, the inductance, the inductance of the rated current and the length of the cable.
1 .额定交流电流的选择
1. selection of rated AC current
额定交流电流是从发热方面设计电抗器的长期工作电流,同时应该考虑足够的高次谐波分量。即输出电抗器实际流过的电流是变频器电机负载的输出电流。
The rated AC current is designed from the heating aspect of the reactor's long operating current, while sufficient harmonic components should be considered. That is, the output current of the output reactor is the output current of the motor load of the inverter.
2. 电压降
2. voltage drop
电压降是指50HZ时,对应实际额定电流时电抗器线圈两端的实际电压降。通常选择电压降在4V~8V左右。
Voltage drop is the actual voltage drop at the end of the reactor coil when 50HZ corresponds to the actual rated current. Usually the voltage drop is about 4V~8V.
3. 电感量的选择
3. selection of inductance
电抗器的额定电感量也是一个重要的参数!若电感量选择不合适,会直接影响额定电流下的电压降的变化,从而引起故障。而电感量的大小取决于电抗器铁芯的截面积和线圈的匝数与气隙的调整。
The rated inductance of the reactor is also an important parameter! If the inductance is not suitable, it will directly affect the voltage drop under the rated current, thus causing a fault. The magnitude of inductance depends on the sectional area of the core of the reactor, the number of turns of the coil and the adjustment of the air gap.
4. 对应额定电流的电感量与电缆长度:
4. inductance and cable length corresponding to rated current:
电缆长度 额定输出电流 电感量
Cable length, rated output current, inductance
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