From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Instruction note detailing the effects of coronal discharge on electrical insulation and metal components.
| Identifier | ExFiles\Box 61b\4\ scan0153 | |
| Date | 8th December 1924 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. 19 was left on contact. ④ There should be less coronal effect as owing to the secondary being inside it can be more effectively insulated from the air. Coronal discharges occurring at voltages of 6 KV and upwards ionise any air present in the vicinity of the windings and charged metal parts, and the resulting ozone produces deterioration of the insulation forming after a long period of time white conducting powder deposits which ultimately results in a breakdown. Oxides of Nitrogen which corrode exposed metal parts are also produced. Signed Contd. This Sheet must be filed on completion of the work. RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 306975 | ||