Phase sequence detector

Posted on Dec 7, 2012

This circuit prevents damage to the load due to incorrect phasing. The three power SSR's are only permitted to turn-on for a phase sequence of phase A leading phase B. If phase A lags phase the input currents will cancel, causing the SCR and the inhibit SSR to remain off until the sequence is reversed.

Phase sequence detector
Click here to download the full size of the above Circuit.

The inhibit SSR is included to maintain isolation at the input.

Leave Comment

characters left:

New Circuits



Popular Circuits

5 watt, 80 meter QRP CW Transceiver
Headphone Amplifier
voltage Calculating current in a simple circuit
Electrical Single Line Diagram - Part Two
Methods for generating Amplitude Modulation
FET Preamplifier
K7LR Memorial Receiver
IR Remote Control Modulation Detector