Posted by Circuits Arena on Thursday, 25 December 2014
Three Phase Auto Modifier Circuit Diagram is the artlcle explaining Three Phase Auto Modifier : This circuit is a modification of High and Low voltage cut off with delay and alarm circuit ap...
Three Phase Auto Modifier:
- This circuit is a modification of High and Low voltage cut off with delay and alarm
circuit appeared in Circuitsarena , which I have tried and found to be
quite reliable. You can adopt this circuit with small modification. Use
a transformer with secondary 15 – 0 – 15 AC Volt at 500mA, for 18Volt
relay operation.
- Normally any modern electrical and electronic equipment can operate with
230 Volt AC supply. That is, it can stand normal voltage operating
range of 195 Volts to 265 Volts. It may misbehave beyond this voltage range.
You can choose the practical voltage required for the low end high cut
off to change over to other phase.
Connection Diagram:
Operation:
- Set VR3 for minimum voltage to switch on the relay input voltage is 195 volts.
- Set VR1 to switch off the relay above a particular voltage 260Volt input.
- You can use a 100μF 40 Volts good make in parallel with relay for chatter free operation.
- Each Phase you have to use one module as above.The relay interconnections are shown in the connection diagram above.
- T1 can be a 15-015 V secondary, 230V primary, 500mA step down transformer.
