. Electric railway journal . Figs. 4, 5 and 6—San Diego Tests—Voltmeter Readings at Section Switches at least once a year, and from their results to rearrangeour copper if conditions change or to install additionalcopper where necessary. INSTRUMENTS For recording the current which passed through the sec-tionalizing switches a General Electric type C-5 curve-drawing ammeter was used. The instrument has the zeromark at the center of the scale and registers 500 amp oneach side of zero. The paper, operated by clockwork,travels at the rate of 3 in. per hour. The ammeter is de- 0- .i,.A,c/ /iwurtS),
. Electric railway journal . Figs. 4, 5 and 6—San Diego Tests—Voltmeter Readings at Section Switches at least once a year, and from their results to rearrangeour copper if conditions change or to install additionalcopper where necessary. INSTRUMENTS For recording the current which passed through the sec-tionalizing switches a General Electric type C-5 curve-drawing ammeter was used. The instrument has the zeromark at the center of the scale and registers 500 amp oneach side of zero. The paper, operated by clockwork,travels at the rate of 3 in. per hour. The ammeter is de- 0- .i,.A,c/ /iwurtS), section insulator by taps G and H. Circuit breaker B,when closed, energizes section B, and the current passesthrough tap G, switch blade Y and contactor operating coilX to the contact stud on the relay, which is then open-circuited. When circuit breaker iC is closed section C is energizedand current passes through tap H, switch blade Z and re-lay operating coil W to ground, closing the relay disk in turn completes the circuit through the contactoroperating coil X, causing the contactor to close. This com-pletes the circuit across the insulator, thus placing the twofeeders from the power house to the switch in multiple. Itwill be seen that these switches are controlled from thepower house and that both sides of the switches must beenergized in order to close them. To open only one side ject/0/7 S.
Size: 1652px × 1513px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
