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if H.V winding is placed in inner side,then insulating cost and fault occuring posibility is more.and it required a thick insulator which occupy a large area is not possible in inner side.so
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What device changes electricity from high voltage with low amps to low voltage with high amps?
A transformer, : By appropriate selection of the numbers of turns, a transformer thus allows an alternating voltage to be stepped up - by making NS more than NP - or stepped down, by making it less. Transformers are some of the most efficient electrical 'machines,with some large units able to transfer 99.75% of their input power to their output,Transformers come in a range of sizes from a thumbnail-sized coupling transformer hidden inside a stage microphone to huge units weighing hundreds of tons used to interconnect portions of national power grids. All operate with the same basic principles, although the range of designs is wide.
When a magnetic field and a wire are moved near each other the voltage produced is said to be?
Induced.
Use of transistor 7812?
7812 is not a transistor. It is a three lead voltage regulator integrated circuit. Its maximum input voltage should be near 35 volts. The minimum input voltage should be near 14 volts. The output will be 12 volts.
What is the function of test pen for electrical wiring installation?
It is a device that senses the presence of a voltage potential when the pen is in near proximity to the voltage source. It is used to make sure power is turned off before working on wiring.
Range of current and voltage produced due to electromagnetic induction?
Induction is the principle operating mechanism of transformers, so any voltage and current output of a transformer - a volt or less to hundreds of thousands of volts (I think the top AC voltage in the world right now is near 1,000kV), and milliamps to thousands of amps.
What is an amortisseur winding?
An amortisseur winding is a squirrel cage winding placed near the surface of the pole faces of a synchronous motor.
What is the voltage obtained when a capacitor is placed in a dc circuit?
Eventually, the capacitor will charge to approximately the source voltage level. As this occurs, the current in the circuit will drop to near zero.
Where does the sun's nuclear fusion occur?
Near the core (center).Near the core (center).Near the core (center).Near the core (center).
How does a transformation feel?
A transformer works on the principle of electromagnetic induction. Let's do a bit of review and then pull some things together. Any conductor through which current is flowing will have a magnetic field around it. When the current begins to flow, the field will build. Conductors with a changing current in them, with an alternating current (AC) flowing through them, will have a changing magnetic field around them. The field will arise and take form, then collapse. It will then arise again with the opposite polarity, and then collapse. This alternating field, which is a direct result of the alternating current, can be set up near another conductor to induce a voltage in that other conductor. The magnetic field around the first conductor is said to "sweep" the second conductor and induce that voltage in it. This is electromagnetic induction, and is the principle on which transformer action occurs. If we wind a coil of wire around a ferromagnetic core, the core will facilitate the "flow" of the magnetic field that arises as AC is applied to the winding. The addition of a second (secondary) winding around the core in the vicinity of the first (primary) winding will allow an optimum amount of "sweeping action" (magnetic coupling) to occur between the two windings. And if we tinker a bit with the number of turns in the windings, we can get stepped up or stepped down voltages as a result of the transformer action in the device.Transformer is a type of machine which is used to step up or step down the voltage.and works on the principle of mutual induction.according to which voltage can be induced in a winding that is electrically isolated from the winding connected with source...
Why percentage differential relay is not suitable for detecting the earth fault near neutral of an wye connected winding?
when earth fault occurs very near to the neutral point of wye winding, the voltage available for driving earth fault current is small. Hence fault current is low. Relay has to be too sensitive and then it can operate for spurious signals like external faults, switching surges etc.
How does transforms works?
A transformer works on the principle of electromagnetic induction. Let's do a bit of review and then pull some things together. Any conductor through which current is flowing will have a magnetic field around it. When the current begins to flow, the field will build. Conductors with a changing current in them, with an alternating current (AC) flowing through them, will have a changing magnetic field around them. The field will arise and take form, then collapse. It will then arise again with the opposite polarity, and then collapse. This alternating field, which is a direct result of the alternating current, can be set up near another conductor to induce a voltage in that other conductor. The magnetic field around the first conductor is said to "sweep" the second conductor and induce that voltage in it. This is electromagnetic induction, and is the principle on which transformer action occurs. If we wind a coil of wire around a ferromagnetic core, the core will facilitate the "flow" of the magnetic field that arises as AC is applied to the winding. The addition of a second (secondary) winding around the core in the vicinity of the first (primary) winding will allow an optimum amount of "sweeping action" (magnetic coupling) to occur between the two windings. And if we tinker a bit with the number of turns in the windings, we can get stepped up or stepped down voltages as a result of the transformer action in the device.Transformer is a type of machine which is used to step up or step down the voltage.and works on the principle of mutual induction.according to which voltage can be induced in a winding that is electrically isolated from the winding connected with source...
What is the purpose of a zener diode when placed near the output in a common power suplly?
The purpose of a zener diode connected at the output of a common supply is to stabilize the output voltage in case a load is connected to it.
Why lightning arrestor should be placed near transformer?
A lightning arrestor acts to reduce a voltage surge due to, for example, a lightning strike on a power line. This will protect the transformer from an over-voltage acting to break down its resistance. A lightning arrestor is connected between each line conductor and earth. Under normal voltage conditions, it acts as an insulator, but when a critical value of over-voltage is reached, it conducts -suppressing the voltage spike.
What happen if primary of transformer connected to dc?
Nothing noticeable. DC power is not transmitted between the coils of a transformer. There would be no current on the other side of the transformer, unless the power of the source was constantly modulated. bescause flux does not change its state.after some time excessive heat is produced and winding may burnAnswerA transformer's primary winding presents two forms of opposition to current flow. The first is resistance, which is dependent upon the length, cross-sectional area, and resistivity of the wound conductor. The second is reactance, which depends upon the inductance of the winding and the frequency of the supply. Resistance opposes both AC and DC currents, while reactance opposes only AC current. In the case of a transformer's windings, the resistance is relatively low while the reactance is very high. When an AC voltage is applied, the reactance is sufficiently high to limit the value of AC current flowing through the winding. However, the resistance is so low that a large current would flow if an equivalent DC voltage was applied instead. This current would likely overheat the winding's insulation, resulting in its breakdown, causing a short circuit(s) which could severely damage the transformer.
What device changes electricity from high voltage with low amps to low voltage with high amps?
A transformer, : By appropriate selection of the numbers of turns, a transformer thus allows an alternating voltage to be stepped up - by making NS more than NP - or stepped down, by making it less. Transformers are some of the most efficient electrical 'machines,with some large units able to transfer 99.75% of their input power to their output,Transformers come in a range of sizes from a thumbnail-sized coupling transformer hidden inside a stage microphone to huge units weighing hundreds of tons used to interconnect portions of national power grids. All operate with the same basic principles, although the range of designs is wide.
Why is the rock belwo the asthenosphere more stiff and rigid than the rock near the outter core?
The rock near the outer core is rigid not stiff
What is something that might interrupt a lines flow?
Many repeated consonant sounds placed near one another
