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).
The testing of 'Mouldrite' synthetic moulding powder for leakage conductance.
| Identifier | ExFiles\Box 61\1\ scan0175 | |
| Date | 2nd April 1931 | |
| X6011 By.{R.W. Bailey - Chief Engineer} from EFC. c. Sft{Mr Swift}/Mr.Brock. EFC4/AD2.4.31. X.6011. "MOULDRITE" SYNTHETIC MOULDING POWDER. The following is a copy of my assistant's report WE.92 on the above :- "We have had handed to us for test two sample test discs moulded with the above powder. Our usual leakage conductance test at high temperatures showed this powder to be remarkably good, no leakage being detected at 100°C. or at temperatures lower. This result is even better than the B.D.C. sample previously reported upon as being very good. One of the discs (each disc was .060" thick) successfully withstood 19,000 volts R.M.S. for 15 mins. Two H.T. cable sleeves (moulded in this material) (E.21468) were also immersed in water 24 hours and tested at 15,000 volts R.M.S. as specified on the drawing without failure, the flashing over voltage being 16,000 R.M.S." EFC/HEW. | ||