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).
Comparison of R.R. and Lucas cartridge fuse types, detailing fusing currents and disadvantages.
| Identifier | ExFiles\Box 166\7\ img023 | |
| Date | 5th September 1933 | |
| -3- Hs{Lord Ernest Hives - Chair}/Wst.1/MA.5.9.33. Cont'd.{John DeLooze - Company Secretary} R.R. cartridge type fitted with 30 S.W.G. will blow at 21 amperes and oxidies at 13.4 amperes. R.R. cartridge type fitted with 32 S.W.G. has a carrying capacity of 17.5 amperes for 30 secs., and an oxidising of 11.5 amperes. Lucas 25 amperes cartridge type. The fusing current is 24 amperes and oxidising current 14.4 amperes. Lucas fitted with 32 S.W.G. has a fusing current of 18 amperes and an oxidising current of 12 amperes. Lucas fitted with 30 S.W.G. has a fusing current of 23.5 amperes and an oxidising current 14.3 amperes. Lucas 4.5 amperes type has a fusing current of 4.3 amperes and an oxidising current of 2.6 amperes. The chief disadvantages of the Lucas fuses are the glass is too small in diameter and the glass breaks occasionally due to the heat of the fuse. Hs{Lord Ernest Hives - Chair}/Wst. | ||