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In areas where a steady three-phase power supply is required, an efficient and intelligent switching system becomes vital. Selfguard's Automatic Phase Changer is specifically intended to handle scenarios in which one or both phases fail. This makes it a reliable alternative for multi-phase installations, especially in rural and semi-urban areas.
Selfguard Automation & Controls, has been providing microcontroller-based automation solutions for decades. The organisation is committed to guaranteeing high product reliability, user-friendly designs, and constant after-sales service. One of its primary offerings is the Auto Phase Changer, which is designed to manage unstable power supplies in an intelligent and automated manner.
What the APC Does
The Selfguard auto phase changer is a microcontroller-based automatic device that ensures continuous power supply to single-phase loads in situations where the regular phase becomes unavailable. It is specifically designed to:
- Automatically route power to the load when one or two of the incoming phases fail
- Restore the original power path when all three phases are healthy
- Operate safely and reliably without any need for manual switching
This capability is crucial in areas where voltage fluctuations or phase failures are common.
Product Ratings and Features
Selfguard's APC is available in three ratings: 63A, 100A, and 200A. These current capacities enable it to accommodate a wide range of load needs, depending on installation size and electrical demand.
Key technical features include:
- Automatic Routing: The device detects phase failures and shifts the load to the available phase(s) without human intervention.
- Auto Reset Functionality: Once the main phase returns, the system automatically resets to its default configuration.
- 10-Second Built-in Delay Timer: To prevent sudden power surges or motor restarts, the APC has a delay mechanism before switching phases.
- LED Indicators: The device includes indicators to show the status of each phase and the active path of the load.
These built-in protections and indicators make the APC safe and easy to monitor.
Based on Microcontroller Logic
The usage of microcontroller-based circuitry is a fundamental distinction among Selfguard devices, including the auto phase changer. Compared to classic analogue or mechanical systems, microcontroller-controlled devices provide improved accuracy and stability.
The APC applies this digital control technology to offer:
- Precise phase detection
- Fast response time
- Protection against improper switching
This enhances the overall durability of connected equipment and reduces risk caused by improper phase supply.
Built to Match Indian Power Conditions
All of Selfguard's products, including the APC, are designed in-house and developed specifically to the Indian power situation. The company emphasises that it develops "products not only for the ideal conditions, but for the actual conditions of the Indian market."
This makes the auto phase changer ideal for places with inconsistent three-phase power—a common problem in many parts of India.
Conclusion
Selfguard's Automatic Phase Changer is a dependable, safe, and intelligent solution for ensuring consistent single-phase electricity in three-phase configurations. Automatic switching, microcontroller-based precision, delay timers, and phase indication ensure continuous functioning in the event of phase loss or imbalance.
With over three decades of experience in automation and electrical control, Selfguard continues to provide strong solutions for real-world electrical challenges.