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- ONAN refers to the natural cooling of oil. Common have the following cooling methods:
Oil immersion (ONAN);
Oil - air - cooled (ONAF);
Forced oil circulation air conditioning (OFAF);
Forced oil circulating water cooling (OFWF);
Forced to guide oil circulation air cooling (ODAF);
Forced to guide the oil circulating water - cooled ODWF).s
single-phase transformer question?
- A 100-kVA, 60-Hz, 7200-480 V, single-phase transformer has the following parameters expressed in OHMS: Rhs3.06 Rls0.014 Xhs6.05 Xls0.027 Xm,hs17,809 Rfe,hs71400 Primary winding is 15*N turns r 3.06 ohms in series with The primary leakage reactance which is L 16mhy(6.05 ohm @60Hz) in series with the magnetizing indctance Xm 17809 ohms 47.24hy which completes the primary series string the core loss is modelled as a 71.4k ohm resistor across the magnetizing inductance the secondary winding is 1*N turns R 0.014 ohms in series with the secondary leakage reactance is L 71.3UHy(0.027ohm@60Hz) the load draws 208.33A (100,000VA/480V) Z 2.304 ohms @ 48.6 deg 2.30448.6 1.786 ohms in series with +J 1.524 ohms(4.042mHy) (75% pf comes from voltage drop is seen from 2.304 ohms but only 75%(1.786 ohms) is resistive transfer from secondary to primary is done by multiplying impedances by 15^2 225 you should be able to do it from here.s
can we increase the current using transformer?
- If you mean a 10 amp transformer, I hope you like the smell of burning insulation. However, you could re-wind the transformer to use one twelfth the number of secondary turns, using wire with twelve times the cross sectional area.s
How is the transformer sorted?
- 4, according to the winding form points:
1) Double winding transformer: Used to connect two voltage levels in the power system.
2) Three-winding transformer: generally used in power system area substation, connect three voltage levels.
3) Autotransformer: Power system for connecting different voltages. Can also be used as a normal step-up or down transformer.
5, according to the core form points:
1) core transformer: for high voltage power transformers.
2) Amorphous alloy transformer: Amorphous alloy core transformer is a new type of magnetic materials, no-load current drop of about 80%, is the energy-saving effect of the ideal distribution transformer, especially for rural power grids and developing regions such as load rate Lower place.
3) shell transformers: special transformers for high current, such as electric furnace transformers, welding transformers; or for electronic equipment and television, radio and other power transformers.s
Soundtrack of Transformers?
- 01. Linkin Park - What I've Done 02. Smashing Pumpkins - Doomsday Clock 03. Disturbed - This Moment 04. Goo Goo Dolls - Before It's Too Late (Sam and Mikaela's Theme) 05. The Used - Pretty Handsome Awkward 06. HIM - Passion's Killing Floor 07. Taking Back Sunday - What It Feels Like To Be A Ghost 08. Styles of Beyond - Second 2 None (feat. Mike Shinoda) 09. Armor For Sleep - End of the World 10. Idiot Pilot - Retina and the Sky 11. Julien-K - Technical Difficulties 12. Mutemath - Transformers Themes
How the transformer is transformer
- And then come to:
U1 / U2 = N1 / N2
In the case of no-load current, I1 / I2 = -N2 / N1, that is, the original and secondary coil current RMS value is inversely proportional to the number of turns, and the phase difference π.
And then available
I1 / I2 = N2 / N1
Ideal transformer original, vice coil power equal P1 = P2. Indicating that the ideal transformer itself without power loss. The actual transformer always has the loss, its efficiency is η = P2 / P1. Power transformers are highly efficient and up to 90%.s
What are the technical parameters of the transformer?
- C, rated current (A): transformer in the rated capacity, allowing long-term through the current.
D, no load loss (kW): when the rated frequency of the rated voltage applied to the end of a winding, the other winding open when the active power. And the core silicon steel sheet performance and manufacturing process, and the applied voltage.
E, no-load current (%): When the transformer in the rated voltage under the secondary side of the load, the current through a winding, generally expressed as a percentage of the rated current.
F, load loss (kW): the transformer secondary winding short circuit, in a winding rated tap position into the rated current, then the power consumption of the transformer.
G, the impedance voltage (%): the secondary winding of the transformer short circuit, in a winding slowly increase the voltage, when the secondary winding short-circuit current equal to the rated value, then the voltage applied once the general. As a percentage.
H, the number of phases and frequency: three-phase beginning to S said, single-phase start with D said. China's national standard frequency f is 50Hz. Foreign countries have 60Hz (such as the United States).s
how to maintain dry transformer winding?
- there is no oil for transformers. they are kept dry by all the heat they generate. it cooks the moisture out. if there is a specific reason you are worried, please do tell. is it going to be stored or go unused for a while? is there a lot of moisture in the area of operation? if not, i would not worry about it. it sounds as if it might be near the end of its life cycle as is. on the bright side transformers dont just burn out. there must be a reason for the failure. moisture is not too bad, but water is.s
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