. The street railway review . othe water contained in them thus has an opportunity to get backinto the harbor without going through the piping nd thecondensers. In order to neutralize the effect of such current as might still leakpast the insulating joints, a small booster generator was provideddriven by a 220-volt motor, the positive pole of the booster beingconnected to the heavy grounded shunt cable just mentioned, thenegative pole being connected to seven different points on each con-denser, there being an adjustable rheostat in each of these branchesof the negative circuit. This superimpo
. The street railway review . othe water contained in them thus has an opportunity to get backinto the harbor without going through the piping nd thecondensers. In order to neutralize the effect of such current as might still leakpast the insulating joints, a small booster generator was provideddriven by a 220-volt motor, the positive pole of the booster beingconnected to the heavy grounded shunt cable just mentioned, thenegative pole being connected to seven different points on each con-denser, there being an adjustable rheostat in each of these branchesof the negative circuit. This superimposed voltage can be adjustedby means of the rheostats to exactly counterbalance the naturalgalvanic eleccromotive forces due to the brass tubes, the iron shelland the circulating water, together with the stray electromotive forcesfrom outside. With the destructive potentials so counterbalanced,tin condenser is in a neutral electric state, which is expected toeffectively prevet 1 the corrosion and pitting on condenser tubes and. BOOSTER EQUIPMENT FOR PREVENTING CONDENSER ELECTROLYSIS. sheets and secure a far longer life than has hitherto been possiblefor this very important and highly vulnerable section of the steamequipment. A differential voltmeter is provided which can be plugged to eachsection of the negative circuit, there being a separate rheostat in each•circuit. By adjusting the rheostats for each section it is possibleto keep the potential at zero in all of them. The booster apparatusis convenientlj situated in the electrical bus gallen directly underthe operating gallery. general, the piping for the main power units in the plant waslaid out to conform with the general design of the station on thelines of the unit system and was so arranged that under norma!conditions a given group of boilers and auxiliaries serves a singlemain power unit which is provided with suitable cross and equaliz-ing connections between itself and the similar system of piping oithe ad
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
