What Are Corona Rings on High Voltage Insulators?

  • Thread starter Thread starter DaveE
  • Start date Start date
  • Tags Tags
    Insulators
AI Thread Summary
Corona rings are devices used on high voltage insulators to reduce the electric field strength at the insulator's ends, thereby minimizing the risk of corona discharge. They help maintain a long creepage path, which is essential for preventing electrical breakdown. The term "corona ring" is used to describe these components, which are often implemented in high voltage applications like voltage multipliers. Research indicates that corona rings can help equalize the electric field around circuits, enhancing overall performance and safety. Understanding their function is crucial for effective high voltage system design.
DaveE
Science Advisor
Gold Member
2024 Award
Messages
4,398
Reaction score
4,061
Please explain what these things are for. I'm guessing they reduce the e-field strength at the end of the insulator while maintaining a long creepage path, maybe? Or something about reducing corona discharge?

What are they called? I can't seem to get a good search term.

20220510_104654.jpg
 
Engineering news on Phys.org
Found it. It's a "corona ring". More than I really wanted to know in this paper. Although there are some things I still don't really have a good feel for.

https://www.researchgate.net/figure/230-kV-three-dimension-model-of-clean-insulator-with-corona-ring_fig1_303737136
 
  • Like
  • Informative
Likes artis, Rive, nsaspook and 2 others
1652294138762.png

200kV voltage multiplier with corona rings to help equalize the electric field around the circuits.
 
  • Like
  • Wow
Likes artis, Klystron, DaveE and 1 other person
Hey guys. I have a question related to electricity and alternating current. Say an alien fictional society developed electricity, and settled on a standard like 73V AC current at 46 Hz. How would appliances be designed, and what impact would the lower frequency and voltage have on transformers, wiring, TVs, computers, LEDs, motors, and heating, assuming the laws of physics and technology are the same as on Earth?
I used to be an HVAC technician. One time I had a service call in which there was no power to the thermostat. The thermostat did not have power because the fuse in the air handler was blown. The fuse in the air handler was blown because there was a low voltage short. The rubber coating on one of the thermostat wires was chewed off by a rodent. The exposed metal in the thermostat wire was touching the metal cabinet of the air handler. This was a low voltage short. This low voltage...
While I was rolling out a shielded cable, a though came to my mind - what happens to the current flow in the cable if there came a short between the wire and the shield in both ends of the cable? For simplicity, lets assume a 1-wire copper wire wrapped in an aluminum shield. The wire and the shield has the same cross section area. There are insulating material between them, and in both ends there is a short between them. My first thought, the total resistance of the cable would be reduced...
Back
Top