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It is not only 3 phase motor, but every electrical device heats up. The reason is the current flowing through the windings causes the I^2*R heat loss. Apart from that, in case of an induction motor, the alternate cycle of magnetization and demagnetization of core material causes the hysterisis loss and eddy current loss. Last but not the least, there are friction and windage losses for a rotating electrical machine. All of these losses are dissipated as heat energy and hence the machine heats up.
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What causes transformers to burn up?
the heat formed in the core due to the "eddy currents" burns a transformer
What is the value of fail megger test result?
Engineers request that 5 meg ohm is the bottom limit. I use 1 meg as a bottom limit when megging conductors before they are energized. I have run motors as low as .5 meg, when the moisture is driven out by the heat of the motors operation the motors usually climbs up to about 2 meg ohms.
How do you you cover exposed motor windings?
You don't. Motors have vents to dissipate heat. Although you can see the windings through these vents, don't cover them or the motor will overheat and burn up.
How do you apply Ohm's law to a toaster?
The wires in a toaster are composed of a metal that heats up when you pass a current through the wires. The voltage, current and resistance for the toaster obey Ohm's Law (Voltage = Current x Resistance). When the wires heat up this heat causes the bread to toast. The toast is not part of the circuit and is not involved in Ohm's Law.
What is the basic working principle of Refrigerator?
A refrigerator works by compressing and expanding a fluid in order to effect a heat transfer from the medium being cooled to the atmosphere where it is allowed to dissipate. The basic system works as follows: A fluid is compressed which causes it to heat up, this is pumped through a coil which transfers the heat of compression to the atmosphere or other fluid this cools the fluid in the system, the fluid is then expanded through an orifice where it cools even further as a result of the expansion (no heat transfer actually occurs, it's what "causes" the expansion), this then passes through another coil inside the refrigerator where it absorbs heat from the air inside the refrigerator, this heated fluid then passes back to the compressor where it is compressed again causing it to heat up again and the cycle repeats.
What causes rear wheel hubs to heat up?
what causes rear wheel rotors to heat up
What causes a motor to become hot when running?
What motors do is to convert one type of energy into another type of energy. And as that conversion is never 100% efficient, some of the energy is turned into heat, which heats up the motor.
What causes rock to heat up?
the sun
What traps the heat in the atmosphere of a planet that causes it to heat up?
The Greenhouse effect...
Why do bicycle wheels and rims heat up when you brake on a hill?
Friction which causes heat.
How does temperature affect the climate?
The heat from the sun causes the surface of the earth to warm up and with the amount of green houses there are it causes the heat from the sun to trapped and that causes global warming.
What causes jupiters moon io to heat up?
Me in July
Why do different materials heat up at different rate?
usually metals or conductors get the heat energy from the heat. the heat transfer the particles in the conductors which causes it to heat up in a faster rate to get it hot.
Property of the filament that makes it light up when electricity flows through it?
Incandescence. The filament is heated by the electricity moving through it, this causes the filament to heat up, and the heat causes the familiar glow.
What causes the rumbling in the pipes when the heat starts up in a steam heat system?
I'm not familiar with rumbling in pipes, but the clanking of pipes when the heat starts up is a result of the pipes expanding because of the heat. Heat causes the metal to expand slightly, and the joints creak and clank when the heat makes its way through the pipes.
Why does the core of a transformer heat up?
The resistance to the electric flow through the wire coil causes heat
How does lifting by heat cause air to rise?
Heat speeds up molecules, this causes the particles to rise
