Partial discharge / corona discharge
Partial discharge / corona discharge
(OP)
Hi everyone,
Is there a difference between corona and partial discharge or are the two terms interchangeable? Also is some one able to shed some light on how this phenomenon occurs.
Many thanks to all who answer in advance
Regards
Norske
Is there a difference between corona and partial discharge or are the two terms interchangeable? Also is some one able to shed some light on how this phenomenon occurs.
Many thanks to all who answer in advance
Regards
Norske






RE: Partial discharge / corona discharge
See
http://www.eatonelectrical.com/NASApp/cs/ContentServer?...
RE: Partial discharge / corona discharge
RE: Partial discharge / corona discharge
Partial discharge takes place INTERNAL to a dielectric media.
RE: Partial discharge / corona discharge
Sorry to disagree, but in reality the term "corona" is also often used to describe partial discharges that occur in voids of solid dielectrics. Likewise the term partial discharge also discribes the ionization around a conductor in air where a complete breakdown of the gap does not occur. The terms are used by and large interchangeabily.
One of my first jobs out of college was to do "corona" testing on underground components (connectors) using solid dielectric. As a college student, I was involved in "corona" testing of EHV overhead transmission line hardware.
RE: Partial discharge / corona discharge
From the UK perspective I agree with DougMSOE, although it would not be the first time the US and the UK have been divided by a common language!
RE: Partial discharge / corona discharge
http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/...
no_stray_voltage@yahoo.com
RE: Partial discharge / corona discharge
1. IEEE Std 100-2000 "Dictionary"
It includes several definitions of Corona, and Corona + , e.g. Corona Charging
1a. Corona (1)(air) A luminous discharge due to ionization of the air surrounding a conductor caused by a voltage gradient exceeding a certain critical value.
(ANSI C57.19.03-1996)
1b. Corona (4) (partial discharge) (corona measurement). A type of localized discharge resulting from gaseous ionization in an insulation system when the voltage stress exceeds a critical value. The ionization is usually localized over a portion of the distance between the electrodes and the system. (IEEE 436-1977)
etc.