Why inverters and UPS fail (Part-1)

Any electronic or electrical equipment users especially in countries like India face unusual difficulties in trying to cope up with AC power problems. The most common problems include frequent blackouts due to inadequate generation capacity, wide AC mains voltage variation due to inadequate distribution infrastructure and poor quality of power.

Keeping in mind these common power quality issues, designing a reliable Inverter/UPS system possess a special challenge to the manufacturers. If these systems are not specifically designed then they may not result as per your expectations.

Power quality varies from one area to the other and is typically worse in rural India compared to urban India. Disturbances in power are generally caused by power station breaks or if there is power switching on the distribution lines or in the transformers or on the high voltage lines. A power disturbance can be defined as unwanted excess energy that is presented to the load.

There are quite a number of serious causes of power disturbances. Power disturbance originate both outside and inside customer facilities. Over loaded power distribution systems can lead to significant voltage variations between peak and off-peak hours. Significant momentary load changes, such as heavy inrush currents can cause severe voltage variations. Circuit-breaker tripping and fuse blowing can cause severe surge voltages as well.

This is a basic understanding stating the primary reasons, why Inverters and UPS fail. But there are some other critical factors that may lead to the failure. Further what can power disturbances cause and the main causes that are leading to repeated failures of the current solution are discussed in the next blog.

Please feel free in referring to the next blog (Part-2) that is technical oriented and provides an accurate understanding as well on why Inverters and UPS fail.

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