(1)  (Dyn11, Dyn1, YNd1, YNd11)

thanks a lot my country Zambia uses DY 11 type of vector group on most of the distribution transformersThank you so much for whatever you have, the best you are giving to us regarding the subject Transformers. Brother Jignesh, kindly provide a bit of ” ANSI Standard Transformer ” also in brief wherever it suits for the comparison of IEC Standards. You are commenting using your Facebook account. ( Log Out /  Change )

Product description The railway traction transformer is a new product independently developed and designed by South China Electric. This series of products can be used for DC traction power supply system which is used in overhead line system for engine traction in large-scale projects such as railway, light rail etc 2、整流变压器接线组别:Dy5d0,Dy7d2;两台并联运行的整流变压器一次侧绕组分别移相+7.5°和-7.5°,使两台整流变压器二次侧电压相角差15°±1.5%,通过整流器获得24脉波整流 so i will use the Phase sifter transformer after Bus VT for canceled out of phase shift. what the vector group of Phase shifter transformer that i need ?Dear Mr. Parmar, While I appreciate your article on significance and selection of vector group of Transformers, pl. let me know in a co-gen power plant where export/ import of power is envisaged, if the vector group YnD1 where in Generator Power Transformer’s secondary winding is Delta connected ( Generator side) and the distance of generator is within 100 meters from the stated transformer, is it necessary to install an earthing transformer? What would be the repercussion if the earthing transformer is not provided? I have installed and operated no. of such power plants with this vector group without an earthing transformer for several years and nothing abnormal noticed even on event of earth fault. Secondly, can we opt for YnYno Transformer for such application apart from the above widely used vector group X-mer which will be more economical too. Is there any constraint in Yy0 configuration? I’ll solicit your reply on both the cited points asap. Regards, M.B.Sinha

Railway Traction Transformer SOUTH CHINA ELECTRI

Esta topología es lograda con la utilización de un transformador con un primario y dos secundarios según la figura 4 (Dy11d0, Dy5d0, Yy0d11,Yy0d5)) Trenntransformator mit zwei sekundären Wicklungssystemen mit einer Schaltgruppe Dy5d0 verwendet. Die Sekundärwicklungen sind für gleiche Klemmenspannung ausgelegt und werden jeweils im Stern und Dreieck verschalten, um die Phasenverschiebung von =/6 zwischen der dreiphasigen Wicklung zu realisieren. Der sechsphasig

Sir, As you said: We can use Dyn1 at distribution system, when we are using Generator Transformer are YNd11. Then why we always use YNd1 only for Generator Transformer? 03_Basic Knowledge siemens - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. 03_Basic Knowledge siemen You would normally choose Yd11 or Yd1 or Yy0 or ( Yz1 or Yz11)( depending upon if it is likely to go in parallal with other existing supply at this voltage or further after steps up/down) instead of Dy11 or Dy1 for Earth fault Protection.

Esta topologa es lograda con la utilizacin de un transformador con un primario y dos secundarios segn la figura 4 (Dy11d0, Dy5d0, Yy0d11,Yy0d5)). El desfase de 30 (en la fundamental) de los dos transformadores logra que las componentes armnicas 5 y 7 tengan igual magnitud, pero desfase de medio ciclo exacto, con lo que son eliminadas al ser. We have a DYN5 Transformer which is used as a step down transformer (10.5 kV to 0.38 kV ) Can we use it as a step up transformer (0.38 kV to 10.5 kV ) ? The transformer is a stand alone and is NOT in parallel with any other device.Hai Parmar Sir your informations are very educative, basically Iam from instrumentation area. Can you please guide me how to calculate nominal maximum demand (NMD). Iam sizing transformer for MCC

When GT: YNd1 ( Y represents HV winding) & Dist Tr: Dyn1, the phase difference will be nullified. Industrial & lab equipment; Electrical equipment & supplies; Power conditioning; Power adapters & inverters; SINAMICS Drives SINAMICS - Low Voltage Engineering Manua View and Download Siemens SINAMICS S120 function manual online. SINAMICS S120 Industrial Equipment pdf manual download

G150 operating-instructions-ru 1. Руководство по эксплуатации · 05/2010 Преобразователи шкафного типа 75 кВт до 1500 кВт SINAMICS G150 SINAMICS s 2. являются группы соединений обмоток трансформатора Dy5d0 или Dy11d0. The Transformer Marketplace. BtB Plaza Ltd is an Internet based Service Provider for the Power Industry

Dear Sir Myself Eknath, i was connecting three phase transformer in Y-Y configuration & observing both the primary & secondary waveform on Scope, both wear distorted sinewave, why i didnt got the reason, please suggest me how to resolve the problem 干式变压器安装时有一些特殊的注意事项,本文介绍一起由安装时布线错误引起的干式变压器铁心接地线烧损故障。1故障情况发生故障的变压器型号为ZBSCRS-1600,额定电压为6 300 V/720 V/720 V,额定容量为1 600 k VA/800 k VA/800 k VA,联结组别为Dy5d0

BTB Plaza - The Transformer Marketplac


  1. 1 前言 城市轨道交通供电系统主要由电力网供电系统 (一般称中压环网系统)、牵引供电系统和动力照明 供电系统构成。城市轨道交通供电属于一级供电负载,一旦中 断,将影响城市轨道交通的环控和照明系统等的运 行。引起城市轨道交通和整个城市交通系统的混乱
  2. sir, if i have a transformer of vector group Ynd11 on generating side.how can i take a neutral on LV side?
  3. Three phase transformer consists of three sets of primary windings, one for each phase, and three sets of secondary windings wound on the same iron core. Separate single-phase transformers can be used and externally interconnected to yield the same results as a 3-phase unit.
  4. videa.h
  5. Vorwort Antriebsfunktionen 8 Funktionshandbuch, (FH1), 01/2011, 6SL3097-4AB00-0AP1 Empfehlung für Neueinsteiger: Lesen Sie zuerst das Kapitel Grundlagen des Antriebssystems (Seite 661), danach je nac

can we install two transformer in parallel with different vector grebe ? if yes say the reason if not say the reason .I would like to synchronise LT 415V Generator voltage driven by back pressure steam to a LT bus derived out of dyn11 transormer. The capacity of transformer is 1500kva,Turbine generator is 1MW/1250kva. I invite your posiblility and suggesstions from author and the group pleaseHai everybody is anybody knows about the Yd11:40 and Yz0:20 vector group in VFD Transformer so please explain me that what is :40 & :20 is stantes for can any one can explain and I also if u have any related documents please send to my mail ID given 产 品: 浏览次数:1545 2000kva24脉冲地铁牵引变压器 : 单 价: 面议 : 最小起订量: 供货总量: 发货期限: 自买家付款之日起 3 天内发货: 更新日期: 2019-12-19 有效期至:长期有 very nice information,but why we are sending with 30 deg lag in generation station??what is the point behind lagging while sending?

I understood that the generator transformer vector group is delta at generator side and star in yard side. But in your article it is mentioned as reverse order. Please clarifyHI. In this modern times is it need for sending power both ways in a transfomer. How will this be affected by the vector lag, in an Dyn11? My config. is a 400 V TN( primary connected) to common grid and my sync. gen 230V IT supplies (true the transf) to the grid from time to time. Will the vectors change from Dyn11 to Yd1 depending of the power direction? お手頃価格!内側良好!。シャネル ラウンドファスナー 長財布 ピンク ベージュ chanel 【オススメ】【中古 1 :代打名無し@実況は実況板で:2006/05/25(木) 01:04:20 ID:mpcROQA00 / ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ | 絶対無敵の.

Reliability assessment of the single motor drive of the

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iv 34130v v 33250v 额定频率50hz ) 、dy7d2(+7.5°) 联连组标号dy5d0(-7.5°612a 短路阻抗?.??/ ?.??/ ?.??% 612a 绝缘等级f 冷却方式an 总重9450千克 次i 1180v 级ii 1180v 服务热线0765-2338222 中国广东顺德特种变压器厂 2.主要技术参数 (1) 交流电源相数:3 (2) 频率:50hz (3) 每相. Normally Dyn11 vector group using at distribution system. Because Generating Transformer are YNd1 for neutralizing the load angle between 11 and 1.

This is a good ready reference regarding vector group and selection of various vector groups. I would like to ask one thing regarding distribution transformers. As you know the distribution system normally on HV side connected in parallel and LV side radial. That means the LV of two transformers will never be connected in parallel. In that case, can we connect the two distribution transformers with different vector group in parallel? Understanding Vector Group of Transformer (Part 1) The primary windings are connected in one of several ways. The two most common configurations are the delta, in which the polarity end of one winding is connected to the non-polarity end of the next, and the star, in which all three non-polarities (or polarity) ends are connected together Thanks Sir; Could you help me for my case. We have 5MVA YnD11 stepup transformer which is should be connected between Genset 400V and transfer it to 11000V, but we have also a DYn11 transformer at the other side on STS crane. Is it ok at connection, what about distribution and how to nuetral earting .. and what about the harmonics produced from crane is it cancelled or affect my Genset ? Please reply me Please reply me Thanks againSIR PLEASE INSIST ME WHAT GRASE OF TRANSFORMER OIL SHOULD BE USED FOR 5 mva TRANSFORMER FOR 33 kV SUPPLY.

华强盛电子(186-7362-5805)为06年就成立的网络变压器生产厂家,十年来一直从事网络变压器的生产加工,真实不虚,请亲们完全放心### 广安c0033-r百兆双口poe+网络变压器选型 其他类似问题2017-05-27三相变压器哪家好?10-2012 Dear Sir, I appreciate your article on significance & selection of vector group, I would like to know about current harmonic reduction in six pulse rectifier transformer. Generally we use Delta – Star Transformer (Dyn11). Star connection fed to 3ph full wave diode bridge. Electrolytic capacitors also connected across DC to minimize ripple voltage. In this configuration while using line choke or DC choke we get 30% current harmonics(5th & 7th harmonics) at input of Rectifier Transformer. 5th harmonic is dominant. As per your article you said if Dyn1 is used it will suppress 5th harmonic. Same way is it possible to suppress 7th harmonics also. by connecting transformer in some other connection. Because if it is possible it will reduce total harmonic distortion(THD i) Please suggest as early as possible. 【送料無料】木材·建築資材·設備 洗面用設備 洗面用水栓金具 混合栓 カクダイ 水栓金具。175-019 カクダイ サーモスタットシャワー混合栓(デッキタイプ) Go to www.sopasia.com to add your email on SOPA's future emailing list for the most updated announcements

Oil-Transformers. Professional high performance technology: We manufacture transformers with a power range from 2000 kVA to 60000 kVA. Depending on the type and application, we can offer highest level of customer transformers with other performance characteristics (like converter or starting transformers).) If we use Yd1 Transformer on Generating Side and Distribution side Dy11 transformer than -30 lag of generating side (Yd1) is nullify by +30 Lead at Receiving side Dy11) so no phase difference respect to generating Side and if we are on the HV side of the Transformer, and if we denote the phases as R- Y-B from left to right, the same phases on the LV side will be R- Y -B, but from left to Right

Dr. Marios Moschakis, Lecturer Department of Electrical Engineering Technological Educational Institute of Larissa, GREECE 宁波轨道交通牵引供电原理(宁波市轨道交通集团有限公司运营分公司维修工程部,浙江,宁波,31500)【摘要】本文以宁波轨道交通为例,对地铁的牵引供电原理进行了详细的阐述,重点介绍了牵引整流等效二十四脉波的形成原理,推荐了整流变联接组别的选择 #----- cut here ----- # This is a shell archive. Remove anything before this line, # then unpack it by saving it in a file and typing sh file

Sir, Thank u so much for giving lot of information regarding VECTOR GROUP,its all very useful to me. Once again thanks to u. Hello, I've been having stomach problems for around 4 months now, stool sample had been taken by my go and she thought that I had IBD. I have then been referred to a hospital to get the colonoscopy done, however with current situation that's been paused I think in diagrams “SIX WAY TO WIRE STAR WINDING” (Y4 and Y8), (Y10 and Y2) must be swapped.

Vector Group of Transformer Electrical Notes & Article


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(2)  Star-Star (Yy0 or Yy6)

The primary windings are connected in one of several ways. The two most common configurations are the delta, in which the polarity end of one winding is connected to the non-polarity end of the next, and the star, in which all three non-polarities (or polarity) ends are connected together. The secondary windings are connected similarly. This means that a 3-phase transformer can have its primary and secondary windings connected the same (delta-delta or star-star), or differently (delta-star or star-delta). 7.5°,Dy11d0( 7.5°)接法表示整流变压器的二次线圈向量顺时针选装7.5°,同样,Dy5d0( 7.5°)和Dy7d2(+7.5°)接法的依此类推。 本文假设整流变压器的向量图中一次线圈均位于12点的位置,则可以得出Dy11d0( 7.5°)和Dy1d0(+7.5°)2种接线方式下的二次线圈向量图. I would like to add another interesting point: The positive effect and other characteristics of transformers of certain vector groups on the mitigation of voltage sags. This can be done by the positive effect of transformers of vector group 1, 5, 7 and 11 (e.g. Dy1, Yd5 etc) on asymmetrical faults and especially as regards one-phase-to-ground faults, which are the most frequent faults. Moreover, it can be proved that two-phase, two-phase-to-ground and three-phase faults at the one side of such transformers give the same sag magnitude at the other side of the transformer under common assumptions used in short-circuit analysis. I have published a journal and a conference paper on that effect. 0001062822-17-000026.txt : 20170421 0001062822-17-000026.hdr.sgml : 20170421 20170421162249 ACCESSION NUMBER: 0001062822-17-000026 CONFORMED SUBMISSION TYPE: 8-K PUBLIC DOCUMENT COUNT: 6 CONFORMED PERIOD OF REPORT: 20170421 ITEM INFORMATION: Entry into a Material Definitive Agreement ITEM INFORMATION: Financial Statements and Exhibits FILED AS OF DATE: 20170421 DATE AS OF CHANGE: 20170421. Dear Sir, Please describe which type of load is suitable for which vector group of transformer. i mean to say like VFDs, 3rd harmonic corresponds with DYN11 etc….

Then in the LV side we using Distribution Transformer Dyn11, 6.3/0.4 kV, it means we still have phase shifting by +30 leading. How do you think?Dear sir can you tell me procedure for finding vector group for unknown vector group of a transformer.

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  1. Dear Parmar ji, Could please provide the difference between YNd5 & YNd11 vector group of the transformers. In one of the project the Generator Transformer (156MVA) vector group is YNd5. So can we suggest to the client for YNd11. We have to justify this point in Technical & Commercial aspect. Seeking your please help us in this regard.
  2. 是的,Dy5d0 就是三绕组变压器,一次侧为角接,二次侧为星接和角接,5代表校角和星之间的绕组相位关系是5点钟(参见变压器绕组相位的钟点表示法),0代表角和角之间的绕组相位关系是0点钟。 前者是一个高压绕组,后者是两个
  3. dear sir am using the PSS Sincal software, and i can’t figure out which group vector represents the single phase two winding transformer.

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ÿû²` wfÚk r‰ ëŸÃÊS- ]l˜|Ê?³­´ôša/gådBiÊ@ « Q'˜ ¤»öB ‡± ¦­Ž-V‡'ЈÊdßb'ÃÇT{DÖï (=Z¹ ø B Dk ºÞV Ú÷üå¦ ÍãÝýf. 二十四脉波整流资料..pdf,3. 24脉波整流机组 整流机组是地铁直流牵引供电系统中的重要设备之一。整流机组的设计、结构 特点和保护方式关系到整个直流牵引供电系统的正常运行。目前,为了提高直流电 的供电质量,降低直流电源的脉动量,城市轨道交通多数采用等效24脉波整流机 组,一般都由.

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前スレ 【草津病院】ボクシングサイト24【成人病】 http://yuzuru.2ch.net/test/read.cgi/boxing/.. 倒角d0.5*75什么意思~~~ 这个大概的意思就是,倒75度角,其一边是0.5。但是,这样说是不对的。谁知道哪边是0.5呢?所以... 0.5 mg/kg/d是什么意思?~~~ 0.5 mg/kg/d是用药量的一种表达方式。 0.5 mg/kg/d各部分的含义是: 0.5s/d 是什么意思~~~ 您没提供出处,s/d 有2 个可能意思

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  1. It’s important to remember that the secondary voltage waveforms are in phase with the primary waveforms when the primary and secondary windings are connected the same way. This condition is called “no phase shift.” But when the primary and secondary windings are connected differently, the secondary voltage waveforms will differ from the corresponding primary voltage waveforms by 30 electrical degrees. This is called a 30 degree phase shift. When two transformers are connected in parallel, their phase shifts must be identical; if not, a short circuit will occur when the transformers are energized.”
  2. a Anta
  3. похожие документы VIII Областной конкурс исследовательских и творческих;pdf pdf 45 К

Biblioteca en línea. Materiales de aprendizaje gratuitos. SINAMICS S120 Manual de funciones · 11/2009 SINAMICS s Funciones de accionamiento _____ Prefacio 1 _____ Alimentación SINAMICS S120 Funciones de accionamiento 2 _____ Canal de consigna ampliado 3 _____ Servorregulación 4 _____ Regulación vectorial 5 _____ Control vectorial por U/f Manual de funciones 6. why both the supply Star & delta required in variable frequency drive of model ACS 800 of ABB make?

which are recommended to be vector group Dy5d0 or Dy11d0. Also, a line reactor with a relative short circuit voltage of 4 per cent should be installed. 'Direct parallel connection' is not advisable with SLM type infeeds due to the high harmonic injection into the system. The advantage of SLM's as an IGB I think, vector arrangement diagram shown in the article for the Dy5 and Dy7 need to change as it may require correction. Introduction: Three phase transformer consists of three sets of primary windings, one for each phase, and three sets of secondary windings wound on the same iron core. Separate single-phase transformers can be used and externally interconnected to yield the same results as a 3-phase unit. The primary windings are connected in one of several ways 三绕组变压器必须是对称的,推荐接法是Dy5d0或是Dy11d0 三绕组变压器的相对短路电压比Uk≥4% 副边绕组短路电压比之差为ΔUk≤5% 副边绕组空载电压之差ΔV≤0.5% 在变压器和各个BLM之间使用同样的功率电缆(相同型号、相同横截面积、相同长度 I do not even know how I ended up right here, but I assumed this submit used to be good. I don’t know who you’re however certainly you’re going to a famous blogger when you are not already. Cheers!

hi i would like to know what are the possible vector group connections for parallel or synchronization of transformers.during vector group testing, why we need to shorting primary & secondary terminals?. i.e., shorting of 1u and 2u terminals

03_Basic Knowledge siemens Power Inverter Rectifie

before testing the vector group of a transformer,how do i calculate the voltage between R-r in a star delta or delta-star Beim Siemens Handbuch werden Trafos Schaltgruppen Dy5d0 oder Dy11d0 empfohlen. Oberspannung Dreieck und zwei Unterspannungs Trafos jeweils Stern und Dreieck. Dort steht dann Phasenverschiebung elektrisch 30°. Das wird dann die Phasenverschiebung zwischen den Unterspannungsseitigen Trafos sein.Dann ist es klar thanks for posting helpful information for transformer designer. could you please explain angle of D1Z. 变压器Dy5d0,Dy5Dd0分别是什么意思能不能具体说明一下? 是的,Dy5d0 就是三绕组变压器,一次侧为角接,二次侧为星接和角接,5代表校角和星之间的绕组相位关..

(3)  Delta – Delta (Dd 0 or Dd 6)

Sir its very helpfull. What is floating neutral and .. weather all neutral can be connected to grid ? or indIvisual earth pit required which are not connected to grid earthing. Esta topología es lograda con la utilización de un transformador con un primario y dos secundarios según la figura 4 (Dy11d0, Dy5d0, Yy0d11,Yy0d5)). El desfase de 30º (en la fundamental) de los dos transformadores logra que las componentes armónicas 5 y 7 tengan igual magnitud, pero desfase de medio ciclo exacto, con lo que son eliminadas. 2000KVA24脉冲地铁牵引变压器城市轨道交通牵引用环氧树脂浇注二十四脉波干式牵引整流变压器产品技术特点随着城市轨道交通的飞速发展,适用于城市地铁及轨道交牵引变压器 变压器类产品专区 产品库 牵引变压器变压器市场网变压器市场网(www.byqsc.net)是变压器、互感器、电抗器等上下游生态链产品. Connection Symbol: Dy5d0 or Dy7d2 LV(kV) 1.2, 1.22 7 6 5 3800 4700 6500 7400 8000 (750 11000 12000 15000 1 19000 o. o. 2400 2460 2580 2130 2760 1460 1460 1460 1460 1460 2510 2580 2780 2810 2910 1070 1070 1070 1010 1070 820 860 910 920 220 220 220 220 220 620 650 680 690 1320 1360 1460 1490 1540 We i ght (kg) 7600 9000 11500 13100 14800 GB1094

Transformer vector groups Dy5d0 or Dy11d0 should preferably be selected. When using sub-windings that are electrically offset with respect to one another, the line harmonics are reduced with respect to the 6-pulse infeed S120公共直流母线传动系统.pdf,S120 公共直流母线传动系统 智能进线整流系统(Smart Infeeds)的配置指导 SINAMICS S120 应用指导 Answers for industry. 前言 S120 公共直流母线传动系统 智能进线整流系统( ) 回馈 整流进线系统的 Smart Infeeds S120 / 的配置指导 设计原理与定义 SINAMICS S120 应用指导 SINAMICS S120 装机装. Als Schaltgruppe wird in der elektrischen Energietechnik bei Dreiphasentransformatoren die Verschaltung der ober- und unterspannungsseitigen Wicklungen in einem Dreiphasenwechselstromsystem bezeichnet. Die Oberseite kennzeichnet die Seite des Transformators mit höherer elektrischer Spannung, die Unterseite mit niedrigerer Spannung.Je nach Schaltgruppe ergeben sich zusätzlich zum.

Problems & Solutions beta; Log in; Upload Ask Home; Domestic appliances; Climate control; Temperature & humidity sensor What are the only phase displacements in degrees with which it is possible to parallel the secondaries of two transformers?

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I have one straight but not so simple question. Is it possible to build a transformer with the following spec:we want to step up 415volts to 11000volts for tunnel work. the transformer we have is star (LV) and Delta(HV). How to give earth fault protection?About Jignesh.Parmar (B.E,Mtech,MIE,FIE,CEng)Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical). He is member of Institution of Engineers (MIE) and CEng,India. Membership No:M-1473586.He has more than 16 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”,”Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics. Christa Schnieders aus Geeste (Niedersachsen) Christa Schnieders früher aus Geeste in Niedersachsen hat folgende Schulen besucht: von 1964 bis 1968 Ludgerischule Groß Hesepe zeitgleich mit Helmut Schwering und weiteren Schülern und von 1964 bis 1973 Ludgerischule Groß Hesepe zeitgleich mit Helmut Schwering und weiteren Schülern Sir,we are designing a 50MVA solar power plant in India.We need some clarification while selecting the transformers.First we are stepping up the voltage from 400V to 22KV,further we are stepping up to 110KV for transmitting.Here which type(Eg.Dy,Yy or Dy) we need to select for the above one.The answer will be useful for us to design.

 (4)  Star-Zig-zag or Delta-Zig-zag (Yz or Dz)

in case of stepdown transformer [230/12], 12 v ac is applied to secondary side. what will happen in primary?Jignesh,I am Niranjan Sahu, Retired DGM of Odisha Hydropower Corpn. But I have spent much time in field of distribution. Can u advise how to check Power theft of consumers by the distribution companies. You are commenting using your Google account. ( Log Out /  Change ) what is the reason of using star & Delta both the supply in Variable Frequency Drive in model ACS 800 of make ABBdear sir will you explaine me formula kva=1.732*v*i*pf in which v=line voltage or phase voltage,i=line ampere or phase ampere,because as per my knownge v= avrage line to line voltage and i= avrage phase to phase current but i am facing problem from transformer manufacturer hope you do needful to me


  1. 同样,还可以得出接线组别为 Dy7d2(+7.5°) 和 Dy5d0(?7.5°)的整流变压器并联运行后的二 次线圈向量图(图略) 。 a1b1 -b3c3 -b2c2 -b4c4 -b1c1 c3a3 c2a2 c4a4 c1a1 -a3b3 -a2b2 -a4b4 -a1b1 b3c3 a4b4 a2b2 a3b3 -c1a1 -c4a4 -c2a2 -c3a3 b1c1 b4c4 b2c2 压器的二次同名端电压差进行测量,见图 4
  2. i really like your diagrames and the explanations jaswant singh bhamra senior test & commissioning sts switchgear uk
  3. Dear Sir, please give me advice we will synchronize generator with condition like below; – Transformer voltage is 70/6.6 kV ( LV side in Geneator and HV side in Bus) – Transformer vector is Yd11 – Generator VT sensing on 6.6 kV – Bus VT sensing on 70 kV – VT sensing vector is Yy0
  4. This is a fantastic tropics. But I want to know about the test methode and voltage relation of different type vector group.
  5. als are w v u from left to right instead of u v w required as per the Generator definition. The UAT (unit auxiliary trafo) on the generator busduct tap-of is Dyn11. My question is whether I need to match the u v w by doing interchange of phases in the busduct or I can connect generator u with GSU w and so on. In such case the GSU vector group will change or not. If yes than the what should be the vector group for UAT?

SINAMICS - Low Voltage Engineering Manual

  1. 对于变压器采用 Dy5d0-Dy7d2 接线的整流机组同样如 此。在实际运行时,一台变压器退出运行,则联跳另一台变压器,可通过邻近变电所 实行大双边供电保证列车运行。如果只运行一台变压器,则电网谐波含量会较正常时 增加
  2. This video is unavailable. Watch Queue Queue. Watch Queue Queu
  3. sir, please recheck your drawings regarding transformer polarity, additive and subtractive polarity drawing had been interchanged. thanks.
  4. Does the downstream transformer vektor groups have an effect on fault currents. This is specifically as distance from the source and voltage levels have effect

sir Iam an electrical engineer working in APTRANSCO, Sir I want to know the operation of OLTC in 100 mva power transformer with tap connection. we have 25 nos of taps with 21st tap as normal if possible explain with sketch.what is the calculation of copper in HV & LV side without removal of the transformer, where only total weight & core weight found & also what will be the size of winding wire.Six Ways to wire Star Winding is very helpful to me,Honestly i don’t know how to do it but because of it i learn thanks for a very good information.What is the disadvantages of dyn5 and dyn 11 in parallel if I do some unconventional connections externally on one side of the Transformer, an internal connected Dyn11 transformer can be changed either to a Dyn7(+150°) or Dyn3(-90°) connection. ?

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(5)  Zig- zag/ star (ZY1 or Zy11)

3. 35kv开关柜送电倒闸操作时,应先合( ),再合( ),停电倒闸操作时与 相反。( I read this article and i realy appreciate your efforts.Thanks for sharing this information.This is very helpful for people……Excellent article. However, you should cover autotransformers since 75% of the transmission transformer in North America are Y-Y autos with or without delta tertiaries or wih buried tertiaries.t

Sir, On a converter transformer name plate ,connection is written as Yd11z11:20z11:40y0z0:20z0:40.What does 11:20,0:20 mean in that? It is a 3 phase transformer with 6 secondary windingsAs per IEC Vector group shown in HV winding / LV winding so i Generator transformer HV side is Transmission side and LV is Generator side.

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