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).
Production test procedure for condensers used in battery ignition systems.
Identifier | ExFiles\Box 34\1\ Scan177 | |
Date | 2nd March 1920 | |
X.2512. 2.3.20. X.1627. PRODUCTION TEST OF CONDENSERS FOR X.2512. BATTERY IGNITION. (1) Before encasing a condenser it shouldbe tested by applying to its terminals an alternating voltage of 450 (r.m.s.) for a period of ten minutes through light double pole fuses and a double pole switch. The voltage must not be switched on to the condenser at this value, but at a lower value not exceeding 300, obtained by the use of a variable reactance in the primary circuit of the transformer, in conjunction with a bank of four lamps connected across the high voltage terminals in a manner described herewith. After switching on at this value the applied voltage may then be increased to 450 by the use of the variable reactance, and maintained for the required ten minutes. Before switching off the condenser the voltage shall be lowered to 300. It shall now be verified (making use of 300 volts) that the condenser is capable of holding a static charge. If this is the case, the condenser, after being disconnected from the transformer by means of the double pole switch, should be capable of producing a spark, when one end of a wire, the other end of which is connected to one condenser terminal, be brought in contact with the other terminal. If it will not do this, it must be rebaked, otherwise it will give a spurious capacity reading on test 2. | ||