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).
Investigation into the protection of the Lucas E.575 dynamo and battery by using fuses in the dynamo circuits.
| Identifier | WestWitteringFiles\D\February1920\ Scan2 | |
| Date | 4th February 1938 | |
| To R.{Sir Henry Royce} from Ck{Mr Clark} 1/2 c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Bn.{W.O. Bentley / Mr Barrington} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Da.{Bernard Day - Chassis Design} ORIGINAL X.3014 - PROTECTION OF LUCAS E.575 DYNAMO (AND BATTERY) BY FUSES IN DYNAMO CIRCUITS. We have made a further investigation of the operation of fuses in the field, control and negative circuits of the Lucas E.575 dynamo. The investigation falls into two sections :- A.{Mr Adams} Protection of the dynamo when the battery is removed or disconnected from any cause and the dynamo is run. B. Protection of the dynamo and battery, should at any time the cut-out stick "on" when the dynamo stops, and the charging switch is left on. We attach for convenience of reference a table of currents for Lucas E.575 dynamo when running normally and in a normally hot condition. It will be seen from this that the maximum currents are as follows :- Field 2.2 amperes. Control 17.3 amps. Main negative 9.2 amps. With the dynamo in a cold condition these will be very approximately as follows :- Field 2.5 amps. Control 18.5 amps. Main negative 12.0 amps. Contd. | ||