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).
Calculating and adjusting the maximum current for a switch based on specific variables.
Identifier | ExFiles\Box 59\1\ Scan278 | |
Date | 22th February 1928 guessed | |
-3- Contd. If therefore we know Ra, Vm, β and γ, we can calculate the maximum current for which the switch must be set in order that it may work with a voltage less than Vm. We want this maximum current to be as great as possible to avoid the switch operating too easily when cold. That means, as is otherwise obvious, that we must have a small β and a large γ. Both can be altered in their right respective directions by winding the same number of turns on a larger winding space and making some of the wire of zero temperature coefficient of resistance. EFC. | ||