used in electrical engineering to determine the no-load impedance in the excitation branch of a transformer. In this experiment‚ open-circuit test is conducted on single-phase and three-phase transformer to determine the iron core resistance‚ Rc and magnetized reactance‚ Xm. The purpose of short-circuit test is to determine the series branch parameters of the equivalent circuit of a Real transformer. The series branch parameters is the summation of primary and referred secondary resistances and reactance
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current‚ and resistance. The equation I = V/R is known as "Ohm’s Law". It states that the amount of steady current through a material is directly proportional to the voltage across the material divided by the electrical resistance of the material. The ohm (R)‚ a unit of electrical resistance‚ is equal to that of a conductor in which a current (I) of one amp is produced by a potential of one volt (V) across its terminals. These fundamental relationships represent the true beginning of electrical circuit
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the field is given by the direction of that force. Electric fields contain electrical energy with energy density proportional to the square of the field amplitude. The electric field is to charge as gravitational acceleration is to mass and force density is to volume. 1. Suppose that two point charges‚ each with a charge of +1.00 Coulomb are separated by a distance of 1.00 meter. Determine the magnitude of the electrical force of repulsion between them. Given: Q1 = 1.00 C Q2 = 1.00 C
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affordable and reliable‚ have flexibility of control‚ and offer significant electrical energy savings through greatly reduced electric bills. They are used in a wide variety of applications for various reasons. For example‚ they are the most effective energy savers in pump and fan applications; they enhance process operations‚ particularly where flow control is involved. VFDs provide soft-start capabilities‚ which decrease electrical stresses and line voltage sags associated with full voltage motor start-ups
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M19 Lab: Reactance and Impedance Roger Argo ECEN 150 Introduction: Purpose: 1. Practice calculating reactance and impedance. 2. Observe the phase shift between voltage and current caused by reactance and impedance. 3. Learn how to make AC voltage phase shift measurements with an oscilloscope. 4. Become more familiar with laboratory instruments and reading instrument operating manuals. Equipment / Materials 1. 0.1 UF Capacitor 2. 1 Kilo ohm Resistor 3. Oscilloscope 4. Generator
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Practical 4 Title: To investigate the discharging of a capacitor through a multimeter as voltmeter Objective: To determine the internal resistance of a multimeter Apparatus and Materials: 1. Capacitor 2. Multi-meter 3. Power supply 4. Switch 5. Stop watch 6. Connecting wires Setup : 1 The circuit was constructed as Figure 5-1. 2 Ensure that the positive terminal of the power supply was connected to the positive terminal of the capacitor if an electrolytic capacitor. 3 Initially‚ switch S should
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Elizabeth. The project will see the erection of four wind “The project will see the erection of four wind turbines‚ utilizing the most modern engineering design...” turbines‚ utilizing the most modern engineering design approved for electrical grid application. The project will cost JPS over J$800 Million‚ and is scheduled for completion by the 4th quarter of 2010. It will result in the addition of 3 megawatts of electricity to the national grid. In preparation for the new
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Introduction to AC Machines Dr. Suad Ibrahim Shahl ELECTRICAL MACHINES II Lecturer: Dr. Suad Ibrahim Shahl Syllabus I. II. III. IV. V. VI. VII. Introduction to AC Machine Synchronous Generators Synchronous Motors Three-Phase Induction Machines Three-Phase Induction Motors Induction Generators Induction Regulators Recommended Textbook : 1) M.G.Say Alternating Current Machines Pitman Pub. 2) A.S. Langsdorf Theory of AC Machinery McGRAW-HILL Pub. 1 Introduction to AC Machines
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Only you can see your contacts Your Contacts list is like a phonebook that only you can see. It includes numbers that 1) you may have synced from your phone or 2) your friends have chosen to share with you. To control who sees your contact information‚ visit your privacy settings. Phonebook Contacts Phonebook Contacts Facebook Phonebook displays contacts you have imported from your phone‚ as well as your Facebook friends. If you would like to remove your mobile contacts from Facebook
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What Is Resistance/Weight Training? Resistance/ weight training is any type of exercise that causes the skeletal muscles to contract and detract with the resistance of an outside force. This outside resistance can be produced in many ways‚ a few examples are: dumbbells‚ rubber exercise tubing‚ your own body weight‚ bricks‚ bottles of water‚ or any other object that causes the muscles to contract. A common name for this exercise is weight lifting. There are many different exercises that fall within
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