安(ān)科瑞 陳(chén)聰

 Application of Split Core Transformer in Industrial Cloud System of Vietnam 

摘(zhāi) 要：分(fēn)析低(dī)壓開口(kǒu)式電流互感器的原理(lǐ)，結合工(gōng)程實例分析(xī)開口電流互感器(qì)在低壓配(pèi)電係統(tǒng)中(zhōng)，主(zhǔ)要是改(gǎi)造(zào)項目(mù)中的應用及施工(gōng)細節(jié)，為用戶(hù)快速(sù)實現(xiàn)智能(néng)配電提(tí)供(gōng)解決方案，該方(fāng)案具有成(chéng)本低(dī)，投(tóu)資(zī)少，安裝接綫(xiàn)簡便等優點，有(yǒu)利(lì)於(yú)低壓智能配電的進(jìn)一(yī)步推(tuī)廣和應(yīng)用(yòng)
。

Abstract: this paper analyzes the principle of low voltage split core current transformer, analyzes the application and construction details of split core current transformer in low voltage distribution system with engineering examples, and provides a solution for users to realize intelligent distribution quickly. The scheme has the advantages of low cost, low investment and simple installation and wiring, which is beneficial to the further popularization and application of low voltage intelligent distribution.

關(guān)鍵詞(cí)：開口(kǒu)式電(diàn)流(liú)互(hù)感(gǎn)器；低壓配(pèi)電(diàn)係(xì)統(tǒng)；改(gǎi)造項目；工作(zuò)原(yuán)理(lǐ)；應用；施工細節

Keywords: Split core current transformer; Low Voltage Distribution System; Renovation Project; Principle; Application; Construction Details

1.引言 Introduction

目前市場大部分低(dī)壓電流互(hù)感(gǎn)器主(zhǔ)要(yào)用(yòng)於新項目(mù)的(dí)建(jiàn)設，由(yóu)於經濟(jì)的飛速發(fā)展，企業(yè)對(duì)節(jié)能減排意識逐(zhú)漸(jiàn)提(tí)高，許(xǔ)多(duō)企(qǐ)業(yè)的電(diàn)氣特點(diǎn)是(shì)： 

At present, most of the low voltage current transformers in the market are mainly used in the construction of new projects. Due to the rapid development of economy, the awareness of energy saving and emission reduction is gradually improved. The electrical characteristics of many enterprises are:

1)電氣(qì)櫃(guì)運(yùn)行的(dí)時間長(cháng)；

2)大(dà)部分(fēn)電(diàn)流互感器(qì)隻是(shì)對(duì)係統電(diàn)流(liú)進行測量，也沒有(yǒu)相應的(dí)計(jì)量裝置(zhì)和保(bǎo)護裝(zhuāng)置(zhì)，計量(liáng)裝置(zhì)隻有一(yī)塊供電(diàn)局的(dí)總表，而(ér)對所有(yǒu)車(chē)間(jiān)電(diàn)能無法進行考核(hé)，係(xì)統綫路保(bǎo)護裝(zhuāng)置根本沒有；

3)大部分綫路(lù)幹(gān)綫為大(dà)規格銅排(pái)，拆(chāi)卸需要大量(liáng)的人力(lì)和(hé)時間，安裝常(cháng)規電流互(hù)感器(qì)不(bù)方(fāng)便(biàn)；

4)企業(yè)生(shēng)產(chǎn)時(shí)間比(bǐ)較緊迫(pò)，不能(néng)長(cháng)時(shí)間(jiān)停(tíng)電(diàn)
。

所(suǒ)以如需(xū)對上述電(diàn)氣進行改(gǎi)造，采用開(kāi)口(kǒu)式(shì)電流互感器可(kě)以為用(yòng)戶節(jié)約大(dà)量的投資
。

1）Long running time of electric gas cabinet;

2）Most of the current transformers only measure the current of the system, and there is no corresponding metering device and protection device. The measuring device has only one master table of the power supply bureau, but the electric energy of all workshops can not be assessed, and the system line protection device is not available at all,;

3）Most of the main lines are large size copper bar, it takes a lot of manpower and time to disassemble, it is not convenient to install conventional current transformer;

4）Enterprise production time is more urgent, can not long time blackout.

Therefore, the use of split core current transformer can save a lot of investment for users.

2.產(chǎn)品設(shè)計Product design

1）結構特(tè)點 Structural characteristics

我司開(kāi)口互感器型號(hào)齊全，有(yǒu)綫纜(lǎn)專(zhuān)門用(yòng)的圓(yuán)孔(kǒng)互感器，有適(shì)用(yòng)於銅排的方孔互感(gǎn)器，本(běn)產品外殼(ké)材料采(cǎi)用(yòng)PC/ABS合(hé)金，具有耐高溫(wēn)，機械強度高，環(huán)保等(děng)特(tè)點；鐵芯(xīn)采用有(yǒu)取向(xiàng)冷紮矽鋼(gāng)片(piàn)，具有性(xìng)能穩(wěn)定，機械強度(dù)高，導磁(cí)率較(jiào)高等特點；具體結構(gòu)如圖1所(suǒ)示(shì)
。

Our company has a complete range of split core current transformer models, including round hole transformers for cables, and square hole transformers for copper bars., this product shell material is PC/ABS alloy, with high temperature resistance, high mechanical strength, environmental protection and other characteristics; The core adopts oriented cold bonded silicon steel sheet with stable performance, high mechanical strength and high magnetic conductivity.

圖(tú)1（方孔(kǒng)型，適用於(yú)銅排） Figure.1

骨架(jià)綫(xiàn)圈(quān)，2-透(tòu)明(míng)翻蓋(gài)，3-安裝(zhuāng)螺母(mǔ)，4-接綫端(duān)子，5-鐵芯，6-彈簧(huáng)，7-外殼，8-安(ān)裝螺釘
。

1-Skeleton coil ,2-transparent flip ,3-mount nut ,4-wiring terminal ,5-core ,6-spring ,7-shell ,8-mount screw.

2）開(kāi)口電(diàn)流互感器工作原(yuán)理Working principle of open current transformer

開(kāi)口(kǒu)低(dī)壓電流互(hù)感(gǎn)器的工作(zuò)原理如(rú)圖1所示(shì)，開(kāi)口(kǒu)電流互感器(qì)的(dí)一(yī)次(cì)繞(rào)組(zǔ)串(chuàn)聯(lián)在(zài)被(bèi)測(cè)綫路(lù)中(zhōng)，I1為綫(xiàn)路(lù)電流即(jí)電(diàn)流(liú)互(hù)感器的一次(cì)電流(liú)，N1為電流(liú)互感器(qì)的一次(cì)匝數(shù)，I2電流(liú)互感(gǎn)器(qì)二(èr)次電流(liú)（通常為5A，1A），N2為電流(liú)互(hù)感器的二次匝數，Z2e為(wéi)二次回(huí)路(lù)設備及連接(jiē)導綫(xiàn)阻抗(kàng)
。當一(yī)次電(diàn)流從電流(liú)互(hù)感器P1端流(liú)進(jìn)，P2端出，在二次Z2e接通的情況(kuàng)下，由電(diàn)磁感(gǎn)應(yīng)原(yuán)理(lǐ)，電流互感(gǎn)器二(èr)次繞(rào)組(zǔ)有電流I2從(cóng)S1流過，經Z2e至(zhì)S2，形成閉合回(huí)路(lù)
。由此可(kě)得(dé)電(diàn)流在理想狀態下(xià)I1×N1=I2×N2，所以有I1/I2=N1/N2=K，K為(wéi)電流(liú)互感器的變(biàn)比
。但(dàn)是(shì)由於開口式電流(liú)互(hù)感(gǎn)器的(dí)鐵(tiě)芯切(qiē)開後，使鐵(tiě)芯的性能下將的比較厲(lì)害，所以須將互(hù)感器(qì)的鐵芯截(jié)麵(miàn)積加大(dà)，而且(qiě)提高(gāo)安(ān)匝(zā)數(shù)，將I1×N1=I2×N2≥100AN
。

The working principle of the  low voltage split core current transformer is shown in figure 1, The primary winding of the split core current transformer is connected in series in the line under test, I1 is the primary current of the current transformer, N1 is the primary turn of the current transformer, I2 current transformer secondary current (usually 5 A，1A), N2 is the secondary turns of the current transformer, Z2e for secondary circuit equipment and connection wire impedance. As the primary current flows through the P1 end of the current transformer, P2 out, If the secondary Z2e is connected, Based on electromagnetic induction, The secondary winding of the current transformer has current I2 flowing through the S1, Z2e to S2, Form a closed loop. Hence the I1×N1=I2×N2, of current in ideal state And so there's I1/I2=N1/N2=K, K is the ratio of current transformer. But since the core of the open current transformer is cut, Make the core performance will be more powerful, So the cross section of the transformer core must be increased, And increase the number of turns, I1×N1=I2×N2≥100 AN.

圖(tú)2 Figure.2

注：圖(tú)2中(zhōng)1-開口電(diàn)流(liú)互感器的上(shàng)體，2-開口(kǒu)電流(liú)互(hù)感器(qì)的(dí)下體，3-安裝螺絲，螺母(mǔ)
。

Note: Figure 2- Upper body of the 1- Open current transformer ,2- Lower body of the 2- Open current transformer ,3- Install screws, nuts

3）產品安裝Product installation

如圖(tú)2所(suǒ)示(shì)，將互感器(qì)的安(ān)裝(zhuāng)螺絲，螺母打開，卸(xiè)下互感器的下體(tǐ)，將互(hù)感器的(dí)上(shàng)體(tǐ)裝(zhuāng)入配電係統(tǒng)的一次母排，合上(shàng)互感(gǎn)器的下體，將(jiāng)互(hù)感器的(dí)安裝(zhuāng)螺絲穿過(guò)互感器上(shàng)，下(xià)體(tǐ)的固定孔，擰上螺母，將(jiāng)互感器的上，下(xià)體固定(dìng)在一起，然(rán)後(hòu)將(jiāng)互感(gǎn)器通過(guò)互(hù)感器兩側(cè)的安裝(zhuāng)固定(dìng)孔將互感器(qì)固(gù)定在(zài)母排(pái)上，完成互(hù)感器的安(ān)裝(zhuāng)
。然後(hòu)將(jiāng)互感器(qì)的(dí)二次接(jiē)到測(cè)量(liáng)裝(zhuāng)置
。整個過(guò)程(chéng)比較快(kuài)速簡單(dān)
。       

As shown in figure 2, the installation screws and nuts of the transformer are opened, the lower body of the transformer is unloaded, the upper body of the transformer is loaded into the primary bus row of the distribution system, the lower body of the transformer is closed, the installation screw of the transformer passes through the fixed hole of the upper and lower body of the transformer, the nut is screwed, the upper and lower body of the transformer is fixed together, and then the transformer is fixed on the bus row through the installation fixing hole on both sides of the transformer to complete the installation of the transformer. Then connect the secondary of the transformer to the measuring device. The whole process is relatively fast and simple.

3.應用(yòng) Applications

開口電(diàn)流互感(gǎn)器主要應用在低(dī)壓配(pèi)電(diàn)改造項(xiàng)目中，開(kāi)口式電(diàn)流互感器(qì)同常(cháng)規閉口互(hù)感器一(yī)樣輸出為(wéi)標(biāo)準(zhǔn)的5A或1A，測(cè)量精(jīng)度(dù)高，容量大，可與測(cè)量儀器，儀(yí)表(biǎo)配(pèi)套使用，部(bù)分(fēn)產品過載能力(lì)強可(kě)與裝(zhuāng)置(zhì)配套使(shǐ)用
。

Split core current transformer is mainly used in the low voltage distribution transformation project. Split core current transformer is output as standard 5 A or 1 A, as the conventional closed current transformer. The measuring precision is high and the capacity is large.

越南美的(dí)工廠為例(lì)如圖(tú)3所(suǒ)示，每(měi)條(tiáo)綫均需(xū)測量三相電(diàn)流(liú),將(jiāng)采集(jí)的(dí)電流信號供(gōng)給(gěi)電能(néng)表(biǎo)DTSD1352，組(zǔ)網之後數據傳(chuán)輸到美的(dí)工業(yè)雲(yún)係統
。A相，B相(xiāng)，C相(xiāng)的(dí)可以選擇(zé)我們(mén)的圓(yuán)孔(kǒng)型開口互感(gǎn)器，每(měi)相(xiāng)額定電流為(wéi)400A,采(cǎi)用AKH-0.66/K K-∮36 400/5開(kāi)口電流(liú)互感器采(cǎi)集電(diàn)流(liú)信(xìn)號(hào)
。現場無(wú)需拆綫或(huò)者銅排(pái)
。

For example, as shown in figure 3, each line needs to measure three-phase current, supply the collected current signal to the watt-hour meter DTSD1352, transmit the data to the industrial cloud system of the United States after networking. A phase, B phase, C phase can choose our round hole type open transformer, each phase rated current is 400 A, adopt AKH-0.66/K K-∮36 The 400/5 split core current transformer collects current signals.There is no need to remove wires or copper bars on site.

4.結(jié)束語Summary

開口式(shì)電(diàn)流互感器已(yǐ)經(jīng)成熟(shú)的在(zài)多個(gè)國家工礦(kuàng)企(qǐ)業工程配(pèi)電監(jiān)控(kòng)係統中(zhōng)得到應(yīng)用，降低(dī)了投資(zī)成本，提供(gōng)工作效率及減(jiǎn)輕工作(zuò)難(nán)度(dù)
。

Split core current transformer has been used in the engineering distribution monitoring system of industrial and mining enterprises in many countries, which reduces the investment cost, provides the working efficiency and reduces the working difficulty.

參(cān)考文(wén)獻 Bibliography

1.Solutions For Enterprise Micro-grid System 2020.02