A 120-V, 60-H air conductor is to be operated in a remote area where the voltage drop in the long transmission line results in a utilization voltage of 102-V. Determine:A) the required step-up voltage ratio for the satisfactory performance.B) The voltage ratio of a standard buck-boost transformer that most closely meets the requirements of the loadC) The voltage at the load with the buck-boost transformer installedD) Sketch the appropriate connection diagram and show the NEWM standard terminal markings
I already answered this. First, what is satisfactory performance? Is the 102 volts the lowest the voltage reaches? I asked you this last time, and I still don't see an answer. If 102 is the lowest, than adding 10 volts is all you need, as that gets you 112 volts, and any 120 volt appliance will operate fine at 110 volts. A 120 to 12 volt transformer is easy to find, and with 102 volts input you will get 10 volts output, and added to 102 that gives you 112 volts, plenty to operate the AC. Parts of this question read like a homework problem, but parts don't such as the undefined term satisfactory performance, so which is it?
required step up voltage ratio load voltage/ primary(or) input voltage k 120/1021.176. a standard buck-boost transformer uses a 120 X 240V primary and a 12X24V or 16X32V secondary. available buck-boost transformer ratio: as the input supply is 102V(around 120V), we'll consider 120V on primary side of auto transformer. a(120+12)/1201.100 a(120+24)/1201.200 a(120+16)/1201.133 a(120+32)/1201.266 hence, the voltage ratio that closely meets the requirement of load is a'1.200 hence, a buck-boost t/f with 24V secondary is required the voltage at load with B-B transformer a' X input supply 1.2 X 102122.4V
