‘Power quality’ can thus have a significant impact on industrial operations. Voltage fluctuations, harmonic distortion, low power factor, transient disturbances and other electrical issues may not appear as direct line items on an electricity bill, but they can still lead to higher energy losses, reduced productivity, premature wear and operational disruptions Felix Kadam, Managing Director & Co-Founder, CosPower Engineering Limited.
For most industries, electricity is largely seen as a cost to be managed, with the focus often placed on how much power is consumed, what it costs per unit and whether consumption can be reduced without affecting production. These are important considerations, but they tell only part of the story.
‘Power quality’ can thus have a significant impact on industrial operations. Voltage fluctuations, harmonic distortion, low power factor, transient disturbances and other electrical issues may not appear as direct line items on an electricity bill, but they can still lead to higher energy losses, reduced productivity, premature wear and operational disruptions. As the Indian industry becomes more automated and highly dependent on electricity, maintaining a stable and efficient electrical environment is becoming more important.
The cost that does not appear on the electricity bill
Low electricity costs do not necessarily translate into lower operating costs when power quality is poor. For example, equipment operating under distorted voltage conditions may experience increased electrical stress and reduced performance. Motors may draw excessive current, resulting in additional heating. Electric transformers suffer increased stress. Sensitive equipment may get affected creating failures.
Other processes like automatic voltage regulation or control can also be disturbed during improper provisions of electrical power. These consequences rarely appear as a direct line item on the electricity bill. Instead, they surface through higher maintenance costs, reduced equipment efficiency, shorter asset life and unplanned downtime.
Energy efficiency is not only about consumption
Industries have put a lot of money into energy-efficient equipment and technologies such as automation and variable speed drives that are meant to lower electricity consumption, but the efficiency of the system is still influenced by the quality of the electrical environment.
One relevant example of this is harmonics. Power electronics, such as rectifiers, variable speed drives, UPSs and other non-linear equipment, are becoming more and more common in today’s industries. They are in fact injecting harmonic currents into electrical systems. Excessive harmonic distortion can increase system losses and cause additional heating in equipment such as transformers, cables, reactors, and other electrical devices.
Likewise, a low power factor means that more current is required to supply the same amount of useful power. This places additional loading on cables, transformers and other equipment. So, the improvement of industrial energy efficiency goes beyond the amount of energy consumed; it is also necessary to figure out how efficiently the energy has been converted into useful work.
Equipment life is another hidden variable
Expensive investment costs characterize industrial machinery. However, organisations are too often concerned only with its purchase price and maintenance schedule, neglecting to consider how electricity affects manufacturing machinery. Persistent voltage variations, harmonic distortion and electrical disturbances can gradually affect equipment performance, even when they do not result in immediate failure. Over time, this can accelerate component degradation and reduce overall asset reliability.
This can make it more difficult for organisations to maximise the economic value of their machinery. While the premature failure of a single component may appear to be a manageable maintenance expense, such costs can multiply significantly across a large industrial facility. The electricity requirements of manufacturing machinery should be considered from the standpoint of achieving maximum return on investment in production assets.
Downtime can cost more than electricity
In a manufacturing plant, the most serious effect of poor power quality may not be excessive electricity use. It may instead be disruption to production. Modern factories function as complex systems. A malfunction in one piece of equipment can stop the entire line. Restarting equipment takes time, and certain operations can result in waste material and changes to the production process.
In continuous or highly automated processes, even a brief power disturbance can trigger consequences that extend well beyond the initial event. Therefore, these electrical issues should be viewed from the perspective of total operating costs rather than power costs alone.
Renewable integration makes the conversation more important
The move towards renewable energy in India is also changing the power quality landscape. Industrial facilities are integrating rooftop solar, battery storage, EV charging infrastructure and other power-electronic systems into their energy mix. While these technologies support decarbonisation and energy efficiency, they also introduce new and dynamic electrical loads. EV charging infrastructure, in particular, can significantly alter load patterns and place additional demands on electrical networks, making effective management of these electrical conditions increasingly important.
The key question is no longer whether the facility is adequately powered; it is whether the facility can ensure a stable, reliable, and efficient power supply given the ever-rising number and type of loads connected. In the context of industries aiming to adopt more renewable energy sources while maintaining production, power quality will assume high relevance.
Measurement must come before correction
One of the major challenges is that power quality issues are often not immediately apparent. For example, a facility may experience unexplained equipment damage, overheating, nuisance tripping, or inconsistent performance without associating these issues with the electrical network. This is where measurement becomes very important.
Instead of analysing this issue on a case-by-case basis, industries should focus on critical parameters, including voltage variations, power factor, harmonic distortion, load behaviour, and other relevant characteristics of the electrical system. After measuring the issue, an industry can react accordingly, thus switching from being reactive to proactive in managing its power quality.
Power quality should become part of the efficiency conversation
As India’s industrial and manufacturing base expands, reliable and efficient electricity will become critical to sustaining this growth. With manufacturing becoming more automated, data-driven and reliant on electricity, the impact of poor power quality is likely to become more pronounced. It should therefore not be viewed as merely a technical concern for electrical teams but as a factor that can directly influence costs, productivity and operational reliability.
The implications extend across finance, operations, maintenance and sustainability, from unexpected costs and productivity losses to equipment reliability and overall energy efficiency. The next phase of industrial energy management therefore requires asking how efficiently electricity is being used in relation to what is being billed.
Recognising this gap presents an opportunity to reduce hidden costs while building electrical systems capable of supporting future industrial growth.