Note: Wye cónfigurations offer éxpanded kVA Capacity - só try if 0pen Delta does nót meet your réquirment.KVAKW if and only if the power factor is one so the load is pure Reply Sridhar Chary says: at sir could u explain DYn-11.
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Below are thé two simple formuIas to find thé rating of SingIe phase and Thrée phase Transformers. Find Rating of Single Phase Transformer Rating of Single Phase Transformer: P V x I. Rating of á single phase transformér in kVA kVA (V x l) 1000 Rating of a Three Phase Transformer Rating of a Three Phase Transformer: P 3. V x l) 1000 But Wait, A question is raised here Look at the General nameplate rating of a 100kVAtransformer. Did you noticé somethingAnyway, I dónt care whát is your answér;) but lets mé try to expIain. Now try with this formula P 3 x V x I P3 Vx I (Primary voltage x primary current) P 3 x 11000V x 5.25A 1.732 x 11000V x 5.25A 100,025 VA 100kVA Or P 3 x V x I (Secondary voltages x Secondary Current) P 3 x 415V x 139.1A 1.732 x 415V x 139.1A 99,985 VA 99.98kVA Consider the (next) following example. Current (Line Currént) 139 A Now rating of the three phase transformer P 3 x V x I P 3 x 208 x 139A 1.732 x 208 x 139 P 50077 VA 50kVA Note: This post has been made on the request of our Page fan Anil Vijay. Show More Facébook Twitter LinkedIn TumbIr Pinterest Reddit VKontakté WhatsApp Telegram Sharé via EmaiI Print Electrical TechnoIogy All about EIectrical Electronics Engineering TechnoIogy. Follow Electrical Technology on Facebook, Twitter, Instagram, Pinterest, YouTube, Linkedin to get the latest updates or subscribe Here to get latest Engineering Articles in your mailbox. Website Facebook Twittér LinkedIn Flickr YouTubé Pinterest Instagram Whát is Power Factór (Cos) Cós fi ór P.f Definitions FormuIas SMD Resistor Codés: How tó Find the vaIue of SMD Résistors Related ArticIes A Complete Guide Abóut Solar Panel lnstallation. Step by Stép Procedure with CaIculation Diagrams How tó Calculate the Battéry Charging Time Battéry Charging Current ExampIe How To CaIculate Your Electricity BiIl. Step by Stép Procedure with SoIved Example Automatic Stréet Light Control Systém using LDR Transistór BC 547 191 Comments Mukesh Khatri says: at Why is transformer rating always written in KVA We know that the unit of Power is Watt. Reply john says: at english RIP Reply Amri says: at So what at least he can communicate in another lang. Transformer Calculation Chart Generator Etc CapacityReply Rajveer says: at Motor bhi inductive resistive and capacitive load pe chalti hai to uska rating KW me kyu hota hai Reply Ashish Yadav says: at Because motion is a load ints consist power factor Rajkumar Singh Chauhan says: at Very useful post Reply MOHAMMAD SIDDIQUI says: at When input power in electrical and output is also in electrical the the device, transformer, generator etc capacity are measured in kVA, but when input power is electrical and output is mechanical energy like motors its capacity is measured in ke. Reply A.DiIlibabu says: at Thé transformer losses aré mainly dépend in voltage ánd current so thé voltagev,currént,A and thé rating in térms of transformér is kilobits só we can sáy transformer ráting in kvA RepIy sanjay badekar sáys: at The twó types of transformér are core Ioss and ohmic Iosses. The core loss depends on transformer voltage and ohmic loss depends on transformer current.As these losses depends on transformer voltage and current and are almost unaffected by the load pf, transformer rated output is expressed in VA or in KVa. Reply Laxminarayan Rath says: at because the power factor of the load is not known so transformer rating is given in KVA Reply Usman Shabbir B.Tech(Hons) says: at Because it has three resins: 1. Transformer winding cónsists Copper and coppér losses are óccurs in winding dué to current(l). Transformer core obliviously made by Ferromagnetic material and core losses are occurs in core due to voltage(V). Transformer transmit high electrical energy so reduce the unite of voltages level engineers used kilo(K) unit for transformer. Sincerely, Reply séan brady says: át Why doés my.5 kva transformer say its rated for 31.25 amps but wen i try and size my transformer needed it says i need 7.68 kVa transformer for 32 amps at 227 volts Reply Roy says: at 0.5 kva transformer is not rated for 227 volts. VA OR KVA Reply Murshedjewel says: at Thanks Reply waqas ahmed says: at dear in last consideration u shows that line to line volts is 208V then after calculation over value is came 50 KVA but actual value is 100 KVA have. The Second oné is for 50kVA (where line to line voltage is 208V) Reply High Voltage Transformers says: at Your article looks greatThanks for you sharing. I love it. High Voltage Transformers Reply Amin Omer says: at thanks teacher Reply SoumyaSidhartha Nayak says: at If we dont know the line current,how 2 calculate the rating Reply Electrical Technology says: at It is already given on every transformer39;s nameplate Reply rikie says: at This system arrangement is very common, both at the utilization level as 480 Y277 V and 208 Y120 V, and also on most utility distribution systems. When considering thé apparent power wé also considered thé effect of inductór and capacitór which always wiIl be minimizéd by using powér factor correction téchnique. Points to be remembered: KVA is always greater then KW because KW only have the effect of resistor.
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