Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 276
If the motor is connected properly, as in the figure, thefield circuit will be complete and will be indicated by a sparkif the starting-box arm is allowed to drop back to the off posi-tion or the switch is opened. Care should be taken not toopen the circuit too quickly, as this induces a very high… … FsG. 279 fuses Srriijch ^UneZ. ^
Electric machinery
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