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Arcing horns (sometimes arc-horns) are projecting conductors used to protect insulatorson high voltage electric power transmission systems from damage during flashover. Overvoltages on transmission lines, due to atmospheric electricity, lightning strikes, or electrical faults, can cause arcsacross insulators (flashovers) that can damage them. The horns encourage the flashover to occur between themselves rather than across of the surface of the insulator they protect.[1] Horns are normally paired on either side of the insulator, one connected to the high voltage part and the other to ground. They are frequently to be seen on insulator strings on overhead lines, or protecting transformer bushings.
The horns can take various forms, such as simple cylindrical rods, circular guard rings, or contoured curves, sometimes known as 'stirrups'.
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The leakage flux of transformer depends on?
Actually it depends on the air gap between the core and the windings of the transformer. This is the reason why stepped core is used in medium and large transformers as it decreases the air gap between the windings and the core of the transformer.
What is meant by Horn Gap Fuse?
horn gap fuse is a protective device which use to protect the equipment from higher voltage.actually horn fuse or horn gap fuse is a thin wire element as compare to load line when a high current drawn in line the wire is melt and line protect.
What is DO and HG fuse?
H.G. Fuse - Horn Gap Fuse D.O.Fuse - Drop Out Fuse
Why the no-load current of an induction motor is high compared to a transformer?
Because of the presence of the air-gap between stator and rotor in motor the magnetization current is much higher than that of a transformer in addition to the friction and windage losses due to the rotation of the rotor.
Why does the magnetization current impose on upper limit on the voltage applied to a transformer core?
The magnetization current imposes an upper limit on the voltage applied to a transformer core due to the ability of the respective spark gap to extinguish. If too much current supply is available the spark gap becomes overheated. This makes it unable to "switch-off" when the high or elevated supply current is flowing through it.
What is horn gap arrester?
http://electricalandelectronics.org/2009/03/21/horn-gap-arrester/
The leakage flux of transformer depends on?
Actually it depends on the air gap between the core and the windings of the transformer. This is the reason why stepped core is used in medium and large transformers as it decreases the air gap between the windings and the core of the transformer.
What is meant by Horn Gap Fuse?
horn gap fuse is a protective device which use to protect the equipment from higher voltage.actually horn fuse or horn gap fuse is a thin wire element as compare to load line when a high current drawn in line the wire is melt and line protect.
Difference between transformer and induction motor?
1. Induction Motor has an air-gap but transformer has no air gap rather it is mutually link. 2. Induction Motor has high no-load current than transformer. 3. Induction Motor is a dynamic device. 4. Induction Motor has high power factor.
Why was the English horn made for what reason?
It fills the gap between the oboe and the bassoon.
Horn gaps in 315 mva power transformer?
I assume that you are asking what is the separation of a horn gap? Horn gaps are determined by voltage levels, not by power levels, so your question cannot be answered.On the other hand, if you are asking what they are for, then its to divert travelling voltage waves (due, for example, to lightning strikes) to earth before they can damage the transformer.Incidentally, if you mean 'megavolt amperes', rather than 'millivolt amperes', then your question should read '315 MV.A', not '315 mva'!
What is DO and HG fuse?
H.G. Fuse - Horn Gap Fuse D.O.Fuse - Drop Out Fuse
What is a HG fuse?
horn Gap fuse, used in 11kV & 33kV circuits to disconnect in case of fault.
Why are the waves at cape horn so big?
the pacific and Atlantic oceans meet at the tiny gap between cape horn and Antarctica. This causes huge waves to form as the oceans collide.
Why the no-load current of an induction motor is high compared to a transformer?
Because of the presence of the air-gap between stator and rotor in motor the magnetization current is much higher than that of a transformer in addition to the friction and windage losses due to the rotation of the rotor.
Why does the magnetization current impose an upper limit on the voltage applied to a transformer?
The magnetization current imposes an upper limit on the voltage applied to a transformer core due to the ability of the respective spark gap to extinguish. If too much current supply is available the spark gap becomes overheated. This makes it unable to "switch-off" when the high or elevated supply current is flowing through it.
Why does the magnetization current impose on upper limit on the voltage applied to a transformer core?
The magnetization current imposes an upper limit on the voltage applied to a transformer core due to the ability of the respective spark gap to extinguish. If too much current supply is available the spark gap becomes overheated. This makes it unable to "switch-off" when the high or elevated supply current is flowing through it.
