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).
Test report on the current capacity of S.S Sequence starter main and auxiliary switch unit contacts.
| Identifier | ExFiles\Box 64\4\ scan0218 | |
| Date | 16th March 1929 | |
| RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 X7653 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.{Mr Elliott - Chief Engineer} & C. Date: 16 - 3 - 1929. Order No.: WD{Mr Wood/Mr Whitehead}46 Customer's No.: X755 S.S Sequence starter main and auxiliary switch unit contacts To test the current capacity capabilities of these contacts we passed 350 amperes for half a minute through the main switch contacts the switch being held right down electrically, and 25 amperes for 5 mins through the teazer contacts (top) the auxiliary arm being allowed to rest normally in its off position. In each case the contacts shewed no signs of distress without any undue heating or burning. Signed: H.E.W. This Sheet must be filed on completion of the work. | ||