1ϕ and 3ϕ Transformer for Open-Circuit and Short-Circuit testAbstract Transformer is a static devices that changes Ac electric power at one voltage level into AC electric power at another voltage level through the action of a magnetic field. It consists of two or more coils of wire wrapped around a common ferromagnetic core. These coils are not directly connected usually. The only connection between the coils is the common magnetic flux present within the core. One of the transformer windings is
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Any earth fault on a 440V system is considered to be a serious trouble and immediate action is required to identify the faulty circuit. Any earth fault on 220V or any low voltage lighting circuit can be considered as important but need not require immediate attention. However‚ attention should be paid at the next earliest opportunity. Finding Earth Fault on 440V circuit Whenever there is an earth fault alarm‚ immediately inform to electrical officer (if he is on board). First action is to check
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losses in a transformer using the open circuit test (experiment # 2) and to determine the equivalent circuit of a transformer by using the short circuit method (experiment # 3). Introduction: In order to determine the equivalent circuit parameters of a transformer two simple tests are used‚ namely the open-circuit test (experiment #2) and the short-circuit test (experiment #3). By performing these simple tests the values for the equivalent circuit of a transformer (see Figures 1 &2). If
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The sensors are usually LED/LDR‚ LED/Photodiode or LED/Phototransistor pairs and the controller is an electronic circuit which executes the desired feedback algorithm. Gear motors are used for driving the robotic wheels. Note:- If you are interested in Arduino based development‚ we have created this same line follower robot using arduino as well. You may try the arduino based circuit as well to see how same project is developed using different controllers. The line follower robot presented here
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In Unit 5 Activity 2 we were asked to predict and then find the brightness and flow rate of a closed circuit with a three cell battery pack‚ a long bulb‚ a capacitor parallel to the long bulb‚ and a round bulb. I originally predicted that the round bulb would be brighter when the circuit was first closed and when the circuit reached a steady state‚ and that the wire between the round bulb and the negative side of the battery would have a higher flow rate than the other wires. However‚ in the steady
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is very useful to reduce a network with several voltage sources and resistors to an equivalent circuit composed a single voltage source and a single resistance connected to a load only. It is used in simplifying and analysing complex linear networks power systems and circuits where one particular where a particular load resistor‚ RL in the circuit is subject to change‚ and recalculation of the circuit is necessary with each trial value of load resistance to determine voltage across it and current
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them. 3. This graph is not an Euler circuit because not all edges have been covered. 4. In order for a graph to have an Euler circuit‚ all vertices must have even valence. Graph II is an Euler circuit because all vertices have even valence. 5. In order for a circuit to be an Euler circuit‚ each path must be covered once and only once. Since some edges in this graph have been covered twice‚ this graph cannot be an Euler circuit. 6. This graph is an Euler circuit. Each edge has been covered once and
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appliances with the increase in standard of living‚ there is a sense of urgency for developing circuits that would ease the complexity of life. Also if at all one wants to know the number of people present in room so as not to have congestion. This circuit proves to be helpful. 1.2 Project Overview This Project “Automatic Room Light Controller with Visitor Counter using Microcontroller is a reliable circuit that takes over the task of controlling the room lights as well us counting number of persons/
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basic of electrical circuits contains a single resistor connected to the terminals of a battery. This is a complete circuit‚ forming a continuous path between the battery terminals. The resistor is called the load and the battery is the source of emf. We assume that all wires used as connectors are ideal‚ with Rwire 0 . In analyzing a circuit‚ we make use of a representation of the circuit termed a schematic. You are already familiar‚ after experiment the Basic Electric Circuits Lab‚ with the representation
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Generation did not advance as much as most people hoped‚ but eventually‚ the "Third Generation" was brought about by the invention of integrated circuits in 1958. Integrated circuits replaced transistors‚ and many computer languages came out in this time. Many more computer companies were born during this time‚ and eventually this led to personal computers for everyday use. Microprocessors introduced the beginning of the "Fourth Generation" and a time where computers were in almost every house.
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