Probably the most common voltage is 440 or 480v 3-phase, 4-wire with a potential of 277v between any phase and the neutral or ground. With this ... Wherever possible, two incoming sources of power are desirable, connected to the transformer banks through an automatic transfer switch. ... The feeder switches normally fall in the size range of from 200 to 600 amp and from these switches, the variousanbsp;...
|Title||:||Cold and freezer storage manual|
|Author||:||E. R. Hallowell|
|Publisher||:||Avi Pub Co - 1980-06-01|