Rolls-Royce Archives
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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).
Page outlining the procedure for measuring coil temperature increase by resistance and conducting insulation tests.

Identifier  ExFiles\Box 69\1\  scan0158
Date  9th October 1928 guessed
  
-2- Contd.

We are proceeding to measure increase of coil
temperature by increase of both primary and secondary winding
resistances in the following cases :-

20 H.P. chassis coil not operating.
" " " operating.
Phantom " " not operating.
" " " operating.

starting in each case from cold or ambient temperature, in
addition to which we are conducting conductance tests of
insulations at high temperatures on the bench.

EFC.
  
  


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