Abstract
Phase absence is a very common and severe problem in any industry, home or office. Many times one or two phases may not be live in three phase supply. Because of this, many times, some electrical appliances will be on in one room and OFF in another room. This creates a big disturbance to our routine work. This project is designed to check the availability of any live phase and the load will be connected to the particular live phase only. Even if a single phase is available, the load will be in ON condition.
This project is designed with AT89S52 MCU. This controller continuously checks for live condition of all phases connected to it and the controller connects the load to the active phase using a TRIAC. If two or three phases are live, the load will be connected to phase I only. LCD is provided to display the status of the phase condition.
SOFTWARE AND HARDWARE TOOLS:
Software Tools:
- Keil compiler
- Orcad.
Hardware Tools:
- Microcontroller AT89S52.
- TRIAC and TRIAC driver
- LCD
- Transformers
Block diagram
