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).
Testing procedure for a regulator's resistance unit and electrical performance.
| Identifier | ExFiles\Box 166\2\ img109 | |
| Date | 28th October 1937 | |
| REGULATOR. Resistance Unit. Check that the wire is in sound condition throughout its length, and that no break is likely to occur, particularly at the terminal screws. Any break or loose connection in this unit may cause serious damage to the regulator contacts. The total value of the resistance measured between its terminals, should be such that when a current of .5A is passed through it, the P.D. across the resistance should be 7.5 - .2 volts, i.e. the resistance should be 15.0 - .4 ohms. Check all connections to see that they are sound, especially those between the regulator and the resistance wire. The cutout connection to terminal A should then be removed, and the unit, with cover on, mounted in a vertical position, and connected to a dynamo and 12 volt battery. A switch, variable (carbon) resistance, and a chassis ammeter should be inserted in the main circuit between the regulator A terminal and the battery. A voltmeter should be connected to regulator terminals + and E so as to measure the regulator terminal volts. For tests of electrical performance, which should now follow, see Specification EL.4. (23.4.37). Handwritten text: 38 (top left), 28/10/37 (top right) Stamped text: ROLLS-ROYCE, LTD. PRINT ROOM 28 OCT 1937 DERBY. | ||