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 sheet detailing procedures for insulation testing on condensers and varnishes.
| Identifier | ExFiles\Box 24\2\ Scan049 | |
| Date | 24th January 1919 | |
| RR. 300 (120B) (SF 349 24-1-19) MP 200552 88225 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No. Customer's No. Re. Insulation Testing (Contd). ⑥ For condensers, as 1, 2 & 5. Also test for weak spots by running over with feeler connected to testing transformer, placing material on plate electrode. ⑦ Make up into condenser as standard & test comparative specific inductive capacity by charging from 100 volts DC and discharging through a ballistic galvanometer. To check leakages, compare readings obtained by discharging at once, and after various intervals of time. (a) Varnishes. ① Cover metal foil with two coats (Contd) Signed This Sheet must be filed on completion of the work. | ||