{"id":4188,"date":"2013-07-07T08:20:58","date_gmt":"2013-07-07T06:20:58","guid":{"rendered":"http:\/\/localhost\/wordpress\/?p=4188"},"modified":"2013-07-07T08:20:58","modified_gmt":"2013-07-07T06:20:58","slug":"%d9%85%d8%b7%d9%84%d9%88%d8%a8-%d9%85%d8%b3%d8%a7%d8%b9%d8%af%d8%a9-%d9%84%d8%ad%d9%84-%d8%a3%d8%b3%d8%a6%d9%84%d8%a9-%d8%b9%d9%86-%d8%a7%d9%84%d9%83%d9%87%d8%b1%d8%a8%d8%a7%d8%a1-transformer","status":"publish","type":"post","link":"https:\/\/www.satfrequencies.com\/invest\/%d9%85%d8%b7%d9%84%d9%88%d8%a8-%d9%85%d8%b3%d8%a7%d8%b9%d8%af%d8%a9-%d9%84%d8%ad%d9%84-%d8%a3%d8%b3%d8%a6%d9%84%d8%a9-%d8%b9%d9%86-%d8%a7%d9%84%d9%83%d9%87%d8%b1%d8%a8%d8%a7%d8%a1-transformer\/","title":{"rendered":"\u0645\u0637\u0644\u0648\u0628 \u0645\u0633\u0627\u0639\u062f\u0629 \u0644\u062d\u0644 \u0623\u0633\u0626\u0644\u0629 \u0639\u0646 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0621……. Transformer"},"content":{"rendered":"
\n

\u0648\u0627\u062d\u062f \u0645\u0646 \u0631\u0628\u0639\u064a \u0639\u062a\u062f\u0647 \u0628\u0631\u062c\u064a\u0643\u062a \u0639\u0646 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0621\u060c\u060c\u060c \u0648 \u062d\u0627\u0648\u0644\u062a \u0623\u062d\u0644 \u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0644\u0643\u0646 \u0637\u0644\u0639\u062a \u0645\u0628 \u0645\u0646 \u062a\u062e\u0635\u0635\u064a\u060c\u060c\u060c \u0648 \u062c\u0631\u0628\u062a \u0641\u064a \u0627\u0644\u0646\u062a \u0644\u0643\u0646 \u0639\u0644\u0649 \u0645\u0627 \u0623\u0638\u0646 \u0627\u0646 \u0627\u0644\u0627\u0633\u0626\u0644\u0629 \u0645\u0628 \u0645\u062d\u062f\u062f\u0629 \u0648 \u0645\u0627 \u0643\u0627\u0646\u062a \u0648\u0627\u0636\u062d\u0629 \u0639\u0644\u0649 \u0627\u0644\u0623\u0642\u0644 \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u064a\u060c\u060c\u060c\u060c \u0623\u0631\u062c\u0648 \u0627\u0644\u0645\u0633\u0627\u0639\u062f\u0629 \u0645\u0646 \u0623\u0635\u062d\u0627\u0628 \u0627\u0644\u062e\u0628\u0631\u0629 \u0641\u064a \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0621\u060c\u060c\u060c \u0645\u0637\u0644\u0648\u0628 \u062d\u0644 \u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u064a\u0648\u0645 \u0627\u0644\u0623\u0631\u0628\u0639\u0627\u0621 \u0627\u0644\u0638\u0647\u0631……………….<\/p>\n

\n\u062a\u062d\u064a\u0627\u062a\u064a…………. \u0645\u0631\u0641\u0642 \u0627\u0644\u0627\u0633\u0626\u0644\u0629<\/p>\n

Project Paper
\n1.\tInvestigate Instrument Transformers using internet resources. Some good sites are:
\nCurrent Transformers (CTs)
\nCurrent Transformers page, The Electricity Forum
\nElectric Power eTool: Illustrated Glossary: Current Transformers
\nCurrent Transformers \u2013Product Information
\nPotential Transformers \u2013 Product Information
\n2
\n.\tA. What is the normal maximum output(s) of a current transformer (CT)
\nB. What is the normal maximum output(s) of a potential transformer (PT)
\nC. What is the difference in operation between a PT and a Capacitive Voltage Transformer (CVT)<\/p>\n

3
\n.\tThe transformer shown in the above diagram is protected by a protection system using three CTs and one PT. Calculate the primary and the secondary Currents of the transformer using the formula for 3-phase power <\/p>\n

4.\tCT\u2019s are available with ratios as followings:
\n25:5, 50:5, 100:5, 200:5, 400:5, 600:5, 800:5, 1200:5, 1600:5 and 2000:5
\nChose the CT ratio you would use for each of the CT\u2019s shown in your diagram. Assume a maximum transformer neutral current of 80A.<\/p>\n

5.\tPT\u2019s are available with ratios following:
\n15k:120, 25k:120, 50k:120, 100k:120, 200k:120, 300k:120, 600k:120, 800k:5
\nChose the PT ratio you would use for the CT shown in your diagram. Assume a maximum transformer neutral current of 80A.<\/p>\n

6.\tIf the system in the diagram is operating at full load, what will be the outputs of the CTs and the PT? <\/p>\n

7.\tThe metering package shown on the following page can read 3-phase current if it connected in a Y configuration. To get a Y connection, we need to use 3 single-phase current transformers (CTs) as shown on the following page. Each CT has a CURRENT IN set of terminals. These are the CT Primary terminals and connect in series between the power supply and the motor. The CT CURRENT OUT terminals are the Secondary terminals and connect to the metering current terminals.
\nShow how you would connect the CTs and metering pack to measure the line current and voltage in the system shown.<\/p>\n

<\/div>\n","protected":false},"excerpt":{"rendered":"

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