08-09-2017, 10:36 AM
In three-phase equipment, if the supply voltage is low in any one phase and you want to run the whole equipment correctly. This team will help you to rescue this situation. However, the appropriate rating fuse must be used in three phases, ie in the input lines R, Y and B. Where the correct voltage is available that time. Another low-voltage phase change to correct the voltage in the same way, to run all the equipment in the single phase in the building.
This circuit is a modification of high and low voltage cut with the delay circuit and alarm appeared in the circuits today, which I have tried and found to be quite reliable. You can adopt this circuit with minor modification. Use a transformer with secondary alternating voltage of 15 - 0 - 15 to 500mA, for 18 volt relay operation. Typically, any modern electrical / electronic equipment can operate with an AC power of 230 volts ± 15%. That is, it can withstand a normal operating voltage of 195 to 265 volts. It can behave badly beyond this voltage range. You can choose the practical voltage required for the low-end high cut to change to another phase.
Circuit diagram
This circuit is a modification of high and low voltage cut with the delay circuit and alarm appeared in the circuits today, which I have tried and found to be quite reliable. You can adopt this circuit with minor modification. Use a transformer with secondary alternating voltage of 15 - 0 - 15 to 500mA, for 18 volt relay operation. Typically, any modern electrical / electronic equipment can operate with an AC power of 230 volts ± 15%. That is, it can withstand a normal operating voltage of 195 to 265 volts. It can behave badly beyond this voltage range. You can choose the practical voltage required for the low-end high cut to change to another phase.
Circuit diagram