Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 572
o o o 1 <j o o 0 o 6 8 >o O o 0 o <5 o < 3 O o o 6 0 o 0 o Q 0 1 I - <N« «\ ■1 <<> *o K ^ •l ELECTRIC RAILWAYS 2,663 The trainmen should make the observations. If there be a loosecable jumper, all cars ahead of the jumper will operate. Ques. How is a grounded cable detected?… … Si*p Switches LS s 6 p ffl ffi *3 fflf i O o 0 2 3 O o o o o o o 4 o o o o 5 o 0 o o o ^ o o o o 6 o o o o o 7 ^o o o o o S O o o o o o 9 Oj o o 0 o o Control fo$L Fig. 3,755.—Schematic diagram of connections type HL control for four 75 horse power 500volt motors. Ques. How is a ground in the train…
Electrical engineering
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