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).
Description of circuit protection using relays instead of fuses, which trip when more than 30 amps is drawn.
| Identifier | ExFiles\Box 125\2\ scan0057 | |
| Date | 16th September 1929 guessed | |
| contd :- -12- instead of fuses. This consists of two elements each protecting part of the circuit. The relays trip when more than 30 amps. is drawn off, and then emit a buzzing sound, while they limit the current passing to 10 amps. Hs{Lord Ernest Hives - Chair}/S.S.Tresilian. | ||