The inverters incorporate the very latest surge and transient filtering circuits to ensure the trains stringent protection and EMC regulations are met. The output is a true sine wave of 230Vac at 50Hz ...

The representation of a PERIODIC sound or WAVEFORM as a sum of Fourier components (i.e. pure SINUSOIDAL WAVEs). According to the FOURIER THEOREM, periodic sound may be shown to consist of SINE WAVEs ...