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).
Testing procedures for a dynamo, covering noise, vibration, brush sparking, and insulation.
| Identifier | ExFiles\Box 60\2\ Scan033 | |
| Date | 28th January 1931 guessed | |
| -4- speed varied up and down with a view to testing for mechanical and electrical noise. (8) The dynamo shall now be run up to 3600 r.p.m. still on load, and shall show no abnormal brush sparking. Further, the mechanical vibration due to any want of balance shall not be excessive. (9) Examine also for rubbing armature, slack bearings, cracked insulation and final condition of commutator and brush surfaces, and see also that with the dynamo hot the end cover can be easily put on and taken off. (10) The insulation of the machine should be tested whilst still hot by applying through a low c.p. 200 volt lamp an alternating voltage of 200 between the windings and the frame, when the lamp should show no sign of being lighted. EFC. {E. Fowler Clarke - Electrical Engineer} | ||