When it comes to protecting your equipment and ensuring uninterrupted operation, choosing the right power solution is essential. Two popular options are Automatic Voltage Regulators (AVR) and Online UPS (Uninterruptible Power Supply) systems. While both offer significant benefits, they serve distinct purposes depending on your needs.
What is an AVR?
An Automatic Voltage Regulator (AVR) is a device designed to stabilize fluctuating voltage levels by stepping power up or down as needed. It ensures a steady power supply to your equipment when voltage dips or surges occur but doesn’t provide backup power during outages.
Key Features of AVR:
- Corrects voltage fluctuations by stepping up or stepping down power.
- Ideal for environments with unstable power grids or sites where one phase lags behind others.
- Protects equipment from damage caused by overvoltage or undervoltage.
What is an Online UPS?
An Online UPS provides the highest level of power protection, delivering a constant, clean power supply regardless of input voltage disturbances or power outages. It maintains uninterrupted power by using batteries to seamlessly support your equipment during fluctuations or outages.
Key Features of Online UPS:
- Provides uninterrupted, clean power even during sudden power cuts.
- Handles quick power fluctuations and delivers constant voltage and frequency.
- Ensures critical equipment stays operational without downtime.
- Offers the highest level of protection for sensitive equipment.
AVR vs Online UPS: Which Is a Better Fit?
Here’s a quick comparison to help you decide:
| Feature | AVR (Automatic Voltage Regulator) | Online UPS (Uninterruptible Power Supply) |
| Purpose | Stabilises voltage, steps power up or down. | Maintains constant power during fluctuations and outages. |
| Backup Power | No | Yes – batteries provide uninterrupted power. |
| Voltage Regulation | Corrects under/overvoltage. | Provides clean, stable voltage at all times. |
| Response to Quick Fluctuations | Limited | Excellent – handles even the fastest fluctuations. |
| Protection Level | Basic – protects against voltage instability. | Highest – protects against voltage instability, surges, and power loss. |
| Best For | Sites with fluctuating voltage but no critical need for backup power. | Critical applications requiring uninterrupted power. |
| Examples | Office electronics, industrial sites with unstable grids. | Data centers, medical equipment, and sensitive electronics. |
Which One Should You Choose?
Choose an AVR if:
- You need to stabilise voltage but don’t require backup power.
- You’re operating in a location with voltage instability but minimal risk of outages.
- Protecting equipment from surges and sags is sufficient for your application.
Choose an Online UPS if:
- You need uninterrupted power for critical systems.
- Your equipment is sensitive to power fluctuations or outages.
- Downtime is not an option, such as in data centers, medical facilities, or IT networks.
| Fault | AVR / UPS |
| One phase voltage up or down | AVR |
| Sensitive equipment tripping on fast adjustments to voltage | Online UPS |
| High / Low voltage on site and need to increase / decrease | AVR |
| Balance phase voltages when uneven | AVR |
Power Solutions from PSS Distributors
At PSS Distributors, we offer a wide range of AVRs and Online UPS systems to match your specific needs. Our experts can help you determine the best solution for your site, whether it’s voltage stabilization, backup power, or complete protection for critical applications.
Need help deciding?
Contact us today to discuss your requirements and find the perfect power solution for your application.
