Auto Phase selector from available 3 phase.

Описание: Auto Phase selector from available 3 phase.
An auto phase selector is a device that can automatically select the correct phase sequence from a set of three-phase power sources to ensure proper operation of three-phase equipment. Here's how you can build an auto phase selector using a few basic electrical components:

Materials required:

Three-phase AC power sources
Three-phase indicator lamps (one for each phase)
Relay
Diodes (one for each phase)
1kΩ resistor (one for each phase)
Steps:

Connect each phase of the three-phase power sources to the corresponding diode.
Connect the cathode (negative) of each diode to the common terminal of the relay.
Connect the anode (positive) of each diode to the indicator lamp for that phase and the 1kΩ resistor.
Connect the other end of each 1kΩ resistor to the normally closed (NC) contact of the relay.
Connect the common contact of the relay to the load (three-phase equipment).
Connect the normally open (NO) contact of the relay to the neutral line.
Working:
When the three-phase power sources are connected correctly with the correct phase sequence, each indicator lamp will light up and the corresponding diode will conduct, allowing current to flow through the 1kΩ resistor and the NC contact of the relay. This energizes the relay coil, causing the contacts to switch from the NC position to the NO position. This connects the load to the correct phase sequence, and the three-phase equipment will operate properly.

If the three-phase power sources are not connected in the correct phase sequence, one or more indicator lamps will not light up, and the corresponding diode(s) will not conduct. As a result, the relay coil will not be energized, and the load will not be connected to any phase. This prevents the equipment from operating, avoiding damage.