EM-7. Derating for altitude and temperature

Sales manager of a big electric motor provider have received three very similar requests from Madrid, Mexico and El Alto. In each of the requests they need induction motor to drive a centrifugal pump with head 60 m, flow 50 l/s, efficiency 83% and rated speed of 950 rpm. The motor is to be operated from existing frequency converter which rated voltage of 400 V and power of 45 kVA. Distance between the pump and the FC is 30 m. Other conditions, e.g. cooling, are specified as well. Help the sales manager to make offers for Madrid/Mexico/El Alto. Propose more than one alternative if needed. Include only motors into the offers.

Madrid, Spain, 667 m above sea level

Mexico, Mexico, 2240 m above sea level

El Alto, Bolivia, 4150 m above sea level