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).
Troubleshooting of a high voltage fault related to a green lamp circuit and switchbox.
| Identifier | WestWitteringFiles\T\November1928\ Scan100 | |
| Date | 20th December 1923 guessed | |
| -3- Contd. high voltage exists from B to earth across the green lamp coils, which will cause the green lamp to be lighted and call for switching off though there is nothing to indicate that the green lamp is not lit normally in ordinary charging conditions except the fact that the ammeter will not be showing charge, but some discharge. Should, however, it eventually turn out from our switchbox tests that it is better to break B first (the evidence does not stand this way at present) the best arrangement would then be for the green lamp coils to remain on C when both B & C be switched off passing from the M.B.& C. to the M.{Mr Moon / Mr Moore}& C. position with some delay of the C contact break in relation to the B break. A rough pencil diagram of the essential portion of the circuit with which this report is concerned, together with a blueprint diagram of the distribution board and green lamp switch as at present arranged, is attached to R's copy. For the time being we EFC. have disconnected the positive end of the green lamp switch coil as the most immediate way of eliminating possibility of a recurrence of this fault. | ||