TRAIN VOLTAMMETER
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Item owner - FNM
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Category - FNM Collection
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Inventory - 0422
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Author - Hartmann e Braun
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Dimensions - 18x23x11 cm
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Dating - 1928-1958
Circular central body with two solid rectangular appendices on either side, with a V impressed on the one on the left and an A on the one on the right. The dial in the central part, protected by glass, features an arched voltage scale measuring voltage on the left, marked from 0 to 4000 V, and current on the right, marked from 0 to 400 A; no. 412574.
This informed the driver of the voltage on the power supply line and the current absorbed by the traction engines.