| Models R and FR DC switchboard (1911 to the 1930s?) |  Back |
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| The Model R was a shunt-type meter that was similar to the Model E DC meter. There were a few
differences including large armature and field coils (astatically wound), gold commutator, and a diamond jewel bearing. This model was offered for use (with shunts) on circuits from 100 to 20,000 amperes, with larger shunts available on request.
The Model FR replaced the Model F meter and consisted of the Model R meter element on the Model F base. This model was offered for circuits from 800 to 20,000 amperes (with appropriate shunts). |
 Electrical Meterman's Handbook |
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