安科瑞 張宇潔

摘 要：介紹了開口式電流互感器在改造項(xiàng)目中的應(yīng)用，以及帶開關(guān)量的開口式電流互感器的作用稍有不慎，和常規(guī)開口互感器對比的優(yōu)勢前來體驗，并結(jié)合工程實(shí)例分析效率和安。

??Abstract：Introduces the application of open type current transformer in the renovation project, as well as the role of open type current transformer with switching quantity, and the advantages of comparison with conventional open type current transformer, and analyzes with engineering examples.

??關(guān)鍵詞 低壓配電系統(tǒng) 開關(guān)量 開口式 電流互感器 防竊電 工作原理

??Keywords low voltage distribution system, switching, open type current transformer, anti-theft, working principle

??1.引言 Introduction

??隨著我國電力工業(yè)中城網(wǎng)及農(nóng)網(wǎng)的改造開放以來，以及低壓配電系統(tǒng)的自動(dòng)化程度不斷提高廣泛認同，開口式電流互感器作為低壓配電系統(tǒng)中的一種重要電氣元件充分發揮，在電網(wǎng)改造中的作用越來越明顯發展成就，已被廣泛地應(yīng)用于測量、計(jì)量重要方式、繼電保護(hù)開展面對面、系統(tǒng)監(jiān)測、接地保護(hù)和各種電力系統(tǒng)分析之中非常重要。

??With the transformation of urban and agricultural networks in China's power industry and the increasing automation of low-voltage distribution systems, open type current transformers, as an important electrical component in low-voltage distribution systems, have become more and more obvious in the transformation of power grids and have been widely used in measurement, metering, relay protection, system monitoring, grounding protection and various power system analysis.

??但是進一步提升，目前市場上的開口式低壓互感器在安裝的時(shí)候可能會(huì)出現(xiàn)卡扣沒卡緊導(dǎo)致鐵芯沒有*閉合；或者在運(yùn)行過程中認為，互感器外殼受到很大應(yīng)力作用系統，外殼鉸鏈斷裂，導(dǎo)致上下鐵芯不閉合重要意義，影響互感器精度或者沒有電流輸出交流等。帶開關(guān)量的開口式電流互感器能夠有助于向儀表或者后臺反饋上述情況更加廣闊，在電力監(jiān)控項(xiàng)目上有廣闊的運(yùn)用前景。

??However, the open type low-voltage transformers on the market at present may be installed with snaps that are not tightened to cause the core to be not completely closed; or during operation, the transformer shell is subjected to great stress and the shell hinge breaks, resulting in the upper and lower cores not being closed, affecting the accuracy of the transformer or no current output. The open type current transformer with switch can effectively feedback the above situation to the instrument or the background, and has a broad application prospect in power monitoring projects.

??2.電流互感器工作原理 Working principle of current transformer

??開口低壓電流互感器的工作原理如圖1所示提高，開口電流互感器的一次繞組串聯(lián)在被測線路中可以使用，I1為線路電流即電流互感器的一次電流，N1為電流互感器的一次匝數(shù)紮實，I2電流互感器二次電流效高化，N2為電流互感器的二次匝數(shù)，Z2e為二次回路設(shè)備及連接導(dǎo)線阻抗投入力度。當(dāng)一次電流從電流互感器P1端流進(jìn)創造，P2端出，在二次Z2e接通的情況下貢獻法治，由電磁感應(yīng)原理設備製造，電流互感器二次繞組有電流I2從S1流過，經(jīng)Z2e至S2共享，形成閉合回路信息化。由此可得電流在理想狀態(tài)下I1×N1=I2×N2，

??所以有I1/I2=N1/N2=K生動，K為電流互感器的變比新型儲能。但是由于開

??口式電流互感器的鐵芯切開后，使鐵芯的性能下將的比較厲害新品技，所以要將互感器的鐵芯截面積加大範圍，而且提高安匝數(shù)，將I1×N1=I2×N2≥100AN紮實做。

??The working principle of the open-ended low-voltage current transformer is shown in Figure 1. The primary winding of the open-ended current transformer is connected in series with the line under test, I1 is the line current, that is, the primary current of the current transformer, and N1 is the primary turns of the current transformer. I2 is the secondary current of the current transformer, N2 is the secondary turns of the current transformer, and Z2e is the impedance of the secondary circuit equipment and connecting wires. When the primary current flows in from the P1 end of the current transformer, and the P2 end goes out, in the case that the secondary Z2e is turned on, according to the principle of electromagnetic induction, the secondary winding of the current transformer has a current I2 flowing from S1, through Z2e to S2, form a closed loop. It can be obtained that the current is I1×N1=I2×N2 in the ideal state, so there is I1/I2=N1/N2=K, and K is the transformation ratio of the current transformer. However, after the iron core of the open current transformer is cut, the performance of the iron core will be worse, so the cross-sectional area of the iron core of the transformer must be increased, and the number of ampere turns must be increased, and I1×N1=I2 ×N2≥100AN.

??另外空間廣闊，該互感器上的開關(guān)量開關(guān)，當(dāng)互感器卡扣沒卡好或是互感器老化導(dǎo)致殼體破裂提供深度撮合服務，開關(guān)按鈕彈起服務品質，常閉變常開，信號終止傳輸組成部分，互感器無信號輸出影響；當(dāng)互感器卡扣正常是，開關(guān)狀態(tài)為常閉互動講，互感器正常工作穩定性。

??In addition, the transformer on the switch, when the transformer snap did not card or the transformer aging caused by the rupture of the shell, the switch button pops up, normally closed to normally open, the signal termination transmission, the transformer no signal output; when the transformer snap is normal, the switch state is normally closed, the transformer works normally.

??3.開口式電流互感器Open type current transformer

??開口式電流互感器主要應(yīng)用于工業(yè)中城網(wǎng)、農(nóng)網(wǎng)改造項(xiàng)目過程中。特點(diǎn)是安裝方便去突破，無需拆除一次母線，亦可帶電操作。但是智能設備，目前市場上的低壓開口式互感器存在以下缺點(diǎn)：

??Open type current transformers are mainly used in industrial city network and agricultural network renovation projects. Features are easy to install, no need to remove the primary busbar, and can also be operated with electricity. However, the current low-voltage open type transformers on the market have the following drawbacks.

??（1）市場上的開口式電流互感器在安裝的時(shí)候可能會(huì)出現(xiàn)卡扣沒卡緊或是鐵芯沒有閉合不可缺少，在運(yùn)行過程中會(huì)出現(xiàn)互感器脫落或者斷開的風(fēng)險(xiǎn)；

??(1) Open type current transformer on the market may not be installed when the clasp is not tight or the core is not closed, the risk of the transformer falling off or disconnected during operation.

??（2）開口式電流互感器在安裝后如果被人為二次打開后喜愛，會(huì)出現(xiàn)無信號等問題重要的角色。

??針對上述不足開放要求，AKH-0.66/K-SW系列電流互感器向好態勢，可以解決上述問題。此互感器外形美觀服務機製，安裝維護(hù)方便簡潔貢獻力量。如圖2所示，該互感器具備以下幾個(gè)優(yōu)點(diǎn)：

??Open type current transformer will have no signal and other problems if it is artificially opened twice after installation.

??AKH-0.66/K-SW series current transformer can solve the above problems. This transformer has a beautiful appearance and is easy and simple to install and maintain. As shown in Figure 2, the transformer has the following advantages.

??（1）AKH-0.66/K-SW系列電流互感器大幅拓展，安裝時(shí)無需將電斷開發行速度，可以帶電操作，閉合直接使用即可現(xiàn)場安裝簡便與時俱進，減少人力成本性能；

??AKH-0.66/K-SW series current transformer, installation without disconnecting the electricity, you can operate with electricity, close the direct use of the site installation is simple, reducing labor costs.

??（2）AKH-0.66/K-SW系列電流互感器，在該模塊有4根引線綜合運用，兩根傳輸電流信號供給，兩根傳輸開關(guān)量信號；

??AKH-0.66/K-SW series current transformer, there are four leads in the module, two to transmit the current signal, two to transmit the switching signal.

??（3）AKH-0.66/K-SW系列電流互感器實事求是，當(dāng)卡扣沒卡好或是互感器老化導(dǎo)致殼體破裂進行探討，上下殼體彈開，鐵芯接觸不良服務水平，卡在互感器下殼體的開關(guān)凸起按鈕就會(huì)向上彈出最新，開關(guān)斷開，開關(guān)量信號終止傳輸處理方法，起到提示開口式低壓互感器停止工作的作用重要作用。

??AKH-0.66/K-SW series current transformers, when the buckle is not locked or the transformer is aging, the casing is broken, the upper and lower casings pop open, the iron core is in poor contact, and the switch stuck on the lower casing of the transformer protrudes The button will pop up, the switch will be disconnected, and the switching signal will terminate the transmission, which will prompt the open-type low-voltage transformer to stop working.

??（4）AKH-0.66/K-SW系列電流互感器，上下殼體帶有鉛封孔關規定，一旦安裝完畢立即進(jìn)行鉛封發展基礎。

??AKH-0.66/K-SW series current transformer, the upper and lower shells with lead seal holes, once the installation is completed immediately lead seal.

??4.參數(shù)對照表Parameter comparison table

??4.結(jié)束語Conclusion

??AKH-0.66/K-SW系列電流互感器的出現(xiàn)，具備異常打開報(bào)警安全鏈、停上電事件上報(bào)等功能顯示，同時(shí)也為企業(yè)降低了人力物力成本，由于市場巨大真正做到，一旦形成生產(chǎn)能力科普活動，也可帶動(dòng)其他行業(yè)的飛速發(fā)展。

??The emergence of AKH-0.66/K-SW series current transformer, with abnormal open alarm, stop on the power event reporting and other functions, but also for the enterprise to reduce the cost of human and material resources, due to the huge market, once the formation of production capacity, but also can drive the rapid development of other industries.