![]() ![]() Phase inversion and decrement of the slope of rising and falling edge (i.e. The circuit is designed here to detect any change in the sequence as above and further procedure beeping sound. When the phase sequence is correct, the red phase lags the yellow phase by 120 0 whereas the green phase lags the red phase by 120 0. ![]() The diode connected to its base keeps the reverse voltage below 0.6V during the negative cycle. The resistor is connected to its base and is so selected that the transistor gets fully saturated when the base voltage becomes 10V. The three transistors T 1, T 2, and T 3 are used to change three-phase waveforms into square waveforms. The circuit of the phase sequence change indicator is shown in figure 1. controlling section and the beeper section. The circuit of phase sequence change indicator is divided into two main sections i.e. Circuit Description of Phase Sequence Change Indicator ![]()
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