. Journal of electricity. SEWAGE DISPOSAL PLANT PUMPING EQUIPMENT Automatic motor control and motor equipment is in duplicate—for operation on A. C. or D. C. service. It, therefore, becomes desirable to provide at leasttwo pumping units, with control devices so arrangedthat as the level of the water in the settling chamberrises, unit No. 1 will be started at a certain height, andin case the capacity of this pump is not sufficient tokeep the level from increasing, then the second pumpis automatically started, giving the combined capacityof the two pumps working simultaneously. The floatswitches
. Journal of electricity. SEWAGE DISPOSAL PLANT PUMPING EQUIPMENT Automatic motor control and motor equipment is in duplicate—for operation on A. C. or D. C. service. It, therefore, becomes desirable to provide at leasttwo pumping units, with control devices so arrangedthat as the level of the water in the settling chamberrises, unit No. 1 will be started at a certain height, andin case the capacity of this pump is not sufficient tokeep the level from increasing, then the second pumpis automatically started, giving the combined capacityof the two pumps working simultaneously. The floatswitches are adjusted so that the pump which startedsecond is the one which stops first. This results inthe wear being concentrated almost entirely on thefirst equipment, and in order to permit equalization ofthe wear, means are provided to permit the relativeinterchange of the connections between the two floatswitches, and the two motors driving the pumps, itmerely being necessary for the attendant at periodicintervals to shif
Size: 1976px × 1265px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidjo, booksubjectelectricity
