. Journal of electricity, power, and gas . field regulator; fifth, andlast close positive swtich. For detecting grounds, the lamp detector on theupper part of the power panel is connected perma-nently across the common negative bus and the posi-tive leg on the lighting circuit bus, and when using thevoltmeter ground detector the ground connection onthis lamp ground detector must be broken by open-ing the ground switch. The connections to the volt-meter ground detector are such that when a circuitis grounded on the positive leg, the instrument willindicate when plugged to negative, and for a gr
. Journal of electricity, power, and gas . field regulator; fifth, andlast close positive swtich. For detecting grounds, the lamp detector on theupper part of the power panel is connected perma-nently across the common negative bus and the posi-tive leg on the lighting circuit bus, and when using thevoltmeter ground detector the ground connection onthis lamp ground detector must be broken by open-ing the ground switch. The connections to the volt-meter ground detector are such that when a circuitis grounded on the positive leg, the instrument willindicate when plugged to negative, and for a groundon the negative of any circuit, the instrument will indi-cate when plugged to any of the positive circuit busbars; provided that said bar is alive, and here it should. Diagram of Connections of Main and Searchliglit Switchboards. With the 2-inch in a receptacle on the dynamopanel and the i-inch plug in the receptacle on thepower panel, we have voltmeter No. i in parallel withvoltmeter No. 2, for calibration. With the i-inch plugin a receptacle on the dynamo panel, the 2-inch in thereceptacle on the power panel, and the i/2-inch plugin the receptacle on lighting panel, voltmeters Nos. iand 3 are in parallel. By substituting the 2j/j-inchplug for the iJ/^-inch plug in the above arrangementNos. I and 4 are in parallel. As only one plug of eachspacing is furnished, it is impossible to make a shortcircuit or parallel two machines on the voltmeter con-nections. An inspection of the diagram will show thisto be true. When starting up a new machine to be parallelwith one already running, the operation at the switch-board is as follows : First, close the equalizer switch ;second, close the circuit breaker; third, close the switchto common negative the voltmet
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Keywords: ., bookcentury1800, bookdecade1890, bookidjo, booksubjectelectricity
