 # Ministry of Higher Education and Scientific Research AlMustansiriyah

• Slides: 5 Ministry of Higher Education and Scientific Research Al-Mustansiriyah University Faculty of Engineering Computer Engineering Department Electrical Eng. Lab 1' class Assistant Lecturer Hazim alkargole 2017 20189 ﺍﻟﻌﻠﻤﻲ ﻭﺍﻟﺒﺤﺚ ﺍﻟﻌﺎﻟﻲ ﻭﺯﺍﺭةﺎﻟﺘﻌﻠﻴﻢ ﺍﻟﺠﺎﻣﻌﺔ ﺍﻟﻤﺴﺘﻨﺼﺮﻳﺔ ﺍﻟﻬﻨﺪﺳﺔ ﻛﻠﻴﺔ ﺍﻟﺤﺎﺳﻮﺏ ﻫﻨﺪﺳﺔ ﻗﺴﻢ Ministry of teaching& high education Al- Mustansiriya University College of engineering Computer & Software engineering 1' class electrical eng. Lab exp. No. ( 6 ) exp. No. ( 6 ): A. ∆ - Ẏ and Ẏ - ∆. B. To know how to convert (∆ - Ẏ) and (Ẏ - ∆). C. In many circuit applications we find some components connected in one of two ways to form a three terminal network: the "delta or ∆" and the "star or Ẏ“ The star (Ẏ) The delta (∆) There are several equations used to convert one network to the other To convert ∆ to Ẏ To convert Ẏ to ∆ D. Procedure: 1. Connect the circuit in fig. 1 and measure the total current. 2. Convert the selected ∆ to Ẏ as in fig. 2. 3. Connect the new circuit as in fig. 3 and measure the total current that must be equal to that in step Selecting Delta(∆)network to convert A R 1 R 2 100Ω R 3 RAC RAB 100Ω RBC 5 V 5 V C B 200Ω R 5 R 4 200Ω R 5 200Ω Fig. 1 200Ω Fig. 2 Delta(∆)converted to Ẏ A 250Ω R 1 RA R 2 12Ω 500Ω RB 18Ω R 3 RC 10 V 6Ω 5 V C B R 4 200Ω Fig. 3 R 5 R 4 R 5 18Ω 12Ω 200Ω Fig. 4 E. Discussion: 1. For the network in fig. 4, Calculate the equivalent resistor and the total current by using ∆ to Ẏ conversion? 2. What is the advantage of the using ∆ - Ẏ and 3. What is your conclusion from this experiment? Ẏ - ∆?