. Electric railway journal . co-operation in introducing the new system as smoothlyas possible. No good railway man, or any other kind of aman, loses his head, goes lame or plays dead simply be-cause something new or different takes a place in his routinedays work. Reserve your own judgment as to the system untilyou are competent, by the experience of an earnest trial, topass one. NO-VOLTAGE RELEASE TYPE C OIL CIRCUITBREAKERS For instantaneously opening its standard type C circuitbreakers, the Electric & Manufacturing Com-pany, Pittsburgh, makes the no-voltage release device show
. Electric railway journal . co-operation in introducing the new system as smoothlyas possible. No good railway man, or any other kind of aman, loses his head, goes lame or plays dead simply be-cause something new or different takes a place in his routinedays work. Reserve your own judgment as to the system untilyou are competent, by the experience of an earnest trial, topass one. NO-VOLTAGE RELEASE TYPE C OIL CIRCUITBREAKERS For instantaneously opening its standard type C circuitbreakers, the Electric & Manufacturing Com-pany, Pittsburgh, makes the no-voltage release device shown inthe accompanying engraving. This release has been appliedto eight large 6600-volt, type HF, three-phase, inductionmotors, ranging over capacities of 3200, 2500, 2000 and 650 hp,in the new merchant mills of the Indiana Steel Company atGary, but it is, of course, equally well adapted to the high-tension side of transformers, since it opens the gravity-operatedcontacts when the control voltage is interrupted. As shown,. No-Voltage Release for Circuit Breakers one of the toggle-joint members of the standard switch-gearis fitted with an armature which engages and is held by thepole pieces of the no-voltage coil just before the toggle passesits central position. In the ordinary type C breaker furnishedwithout this no-voltage release the contacts are held closedby carrying this toggle over its dead center, a position whereit locks. In the no-voltage type the toggle is detained by the attrac-tion of the pole pieces for the armature while still on theoperating side of its center, so that in case of any interruption10 the control voltage the breaker immediately opens and cannot be closed except in the usual manner. Full protection isthus afforded In the motors connected through (heir circuitbreakers, and in the ease of overload on the rolls or failureof the power house their circuits are immediately opened, solhat the machines must be gradually accelerated in the usualway. 322 ELECTR
Size: 1389px × 1799px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
