210 N. Allen Street
Centralia, MO 65240
hubbellpowersystems.com/contact/
Centralia, MO 65240
hubbellpowersystems.com/contact/
Corona Rings
Corona Performance
Hi*Lite™ XL suspension insulators are RIV and corona free through 161 kV, by the use of integral Corona Shield Rings (CSR). Due to the small diameter of the end fittings, corona shielding is necessary at 230 kV and above. The table below details the rings necessary for voltages equal to or exceeding that listed in the column header.
Normal Applications: Top Grounded, Bottom Energized
| Insulator | Orientation | 230 kV Ring | 345 kV Ring | 500 kV Rings |
|---|---|---|---|---|
| Suspension 25/30 K SML |
Top Bottom |
NONE 2717613001 |
NONE 2717053001 |
2717613001 2717513001 |
| Suspension 50 K SML |
Top Bottom |
NONE 2717613002 |
NONE 2717053002 |
2717613002 2717513002 |
The physical and electrical values for the insulators on pages 26-8 through 26-10 are shown without corona protection above 161 kV. Ohio Brass has therefore provided the table below that yields the physical and electrical changes to the insulator when rings are installed for voltages above 161 kV.
Physical & Electrical Change Table
| Physical & Electrical Characteristics | 230 kV Ring | 345 kV Ring | 500 kV Rings |
|---|---|---|---|
| Dry Arc Distance inches (mm) | -1.2 (-30.48) | -2 (-50.8) | -5 (-127.0) |
| Leakage Distance inches (mm) | 0 | 0 | 0 |
| 60 Hz Flashover Dry - kV | -10 | -15 | -30 |
| 60 Hz Flashover Wet - kV | 0 | 0 | 0 |
| Critical Flashover Positive - kV | -15 | -25 | -65 |
| Critical Flashover Negative - kV | -20 | -30 | -65 |
| Net Weight pounds (kg) | 3 (1.8) | 3 (1.8) | 5.1 (2.29) |
|
All contents Copyright® 2001 -
Hubbell Power Systems, Inc. All rights reserved. Because Hubbell has a policy of
continuous product improvement, we reserve the right to change design specifications
without notice.
Terms of Use | Contact Us | Site Map | A subsidiary of Hubbell Incorporated |