104.What will happen if we connect a 60 Hz appliance to 50 Hz supply

       If we were to connect 60 Hz motor to a 50Hz supply then Motor would work, but it will run at a     lower speed.  This would simply mean that the work a motor is doing e.g driving a pump will be   reduced and the pump will run at a lower speed.  This will eventually have an effect on                 systems where flow rate is important.  Apart from running slow, motor will draw more current         than what it is designed for and as a result will cause overheating of motor, which may                   eventually cause fire or a burn out of motor.

       To avoid that overheating problem it is important to reduce the voltage.  Always take into               consideration the Voltage/Frequency ratio.  Voltage/frequency ratio is always constant for             e.g. 440/60 HZ = 7.33, Now taking 7.33 as constant and we have to connect a motor with a           frequency of 50Hz the voltage should now kept at:- Voltage/50=7.33, This would mean ,               Voltage = 50*7.33=366.5 Volts.