Low-Cost Phase Changer

Automatic three-phase selector for rural areas using relays and voltage sensing to ensure stable power to irrigation pumps.

GitHub Source Code YouTube Demo Video Google Drive Project Files

Technologies Used

Power Electronics Phase Selection Relays Voltage Sensing

Started: March 5, 2024

Completed: March 22, 2024

Duration: 18 Days

Technical Specifications

3-Phase
Input

Three Phase Supply

Relay
Switching

Automatic Relay

Voltage
Sensing

230V ±10%

Cost
Budget

Under ₹800

Project Progress

Relay Logic100%
Voltage Detection100%
Field Testing90%

Project Overview

A cost-effective automatic phase changer designed for rural farmers. It detects voltage on all three phases and switches the irrigation pump to the available phase, preventing downtime.

Key Features

Auto
Auto Phase Detection

Scans all 3 phases every 5 sec.

Switch
Instant Switching

Relays activate in < 1 sec.

Low Cost
Affordable Design

Built under ₹800 total.

Achievements

Reduced pump downtime by 95% in field trials
Phase Changer Project Demo

Key Learnings

Three-Phase Power Systems

Understood phase imbalance and selection logic.

Relay Control Circuits

Designed fail-safe relay drivers.

Rural Engineering

Tailored solution for real-world farming needs.

Target Audience

  • Rural farmers & cooperatives
  • Agricultural engineers
  • Government rural electrification projects
  • DIY power automation enthusiasts

Applications

  • Irrigation pump control
  • Village power distribution
  • Small-scale industries
  • Backup power systems
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