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DragonPetter
- 830
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The leads on giant capacitors have always looked mysterious and complicated to me. They almost look like RF cavities to me.
Why are the bushings the shape they are?
Why are the bushings the shape they are?
Bob S said:This looks more like a giant HV insulator. The wavy shape (without sharp corners) is to maximize surface path length and minimize surface leakage, corona, and eventual arcing from exposure to year-round weather conditions, dust, air pollution etc.
Basically it's a hollow insulator with the capacitive coupling device inside.Are these brushing the same things I see on power lines and at power stations some times?
dlgoff said:I use to be able to tell what a transmission line voltage is by the length of their insulators.
Yes, hanging the conductors. I probably shouldn't have posted causing confusion.DragonPetter said:I'm confused of what the purpose of that one in the picture is even for. Is it just to hang the conductors from the tower?
dlgoff said:Yes, hanging the conductors. I probably shouldn't have posted causing confusion.
jim hardy said:The little 'dumbell' things hanging from wire adjacent insulator are interesting.
I once asked our relay folks about them. They're mechanical dampers to prevent the cables "singing" in the wind like guitar strings which fatigues them. They are tuned to line's expected mechanical frequency and i think 1/4 wavelength from insulator. They're a bundle of wires clamped loosely together so as to have friction .
Exactly analogous to a tuning stub on electrical transmission line. no pun intended.
Getting a little off topic, albeit we're talking HV, they are called Stockbridge dampers.jim hardy said:The little 'dumbell' things hanging from wire adjacent insulator are interesting.
I once asked our relay folks about them. They're mechanical dampers to prevent the cables "singing" in the wind like guitar strings which fatigues them. They are tuned to line's expected mechanical frequency and i think 1/4 wavelength from insulator. They're a bundle of wires clamped loosely together so as to have friction .
Exactly analogous to a tuning stub on electrical transmission line. no pun intended.
Capacitor bushings have strange shapes because they are designed to maximize the surface area of the capacitor plates, which increases the capacitance. This allows for more energy storage and better performance of the capacitor.
Yes, the strange shapes of capacitor bushings serve a specific purpose. They are designed to distribute the electric field evenly across the capacitor plates, reducing the risk of electrical breakdown and improving the overall efficiency of the capacitor.
Yes, there are different types of strange shapes for capacitor bushings. Some common shapes include cylindrical, conical, and spherical. Each shape has its own advantages and is chosen based on the specific application and requirements of the capacitor.
Yes, the strange shapes of capacitor bushings can have a significant impact on the performance of a circuit. As mentioned earlier, these shapes are carefully designed to increase capacitance and distribute the electric field evenly, which can improve the efficiency and stability of a circuit.
While the strange shapes of capacitor bushings have several advantages, they can also have some disadvantages. These shapes may make the capacitor more expensive to manufacture and can also increase the overall size of the capacitor, which may not be desirable in certain applications.