Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 161
Fig. 162.—Series automatic switches. rapidly as the stem F ceases to be saturated, until finally theupward pull is able to raise the plunger. The critical value of current with which the plunger can belifted may be adjusted by raising or lowering the iron plug Cso as to change the value of fa…
Electrical engineering
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