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Not a Sag. Not a Transient.
Still a Problem.
Rapid Voltage Change (RVC) is one of the most commonly misunderstood—and frequently overlooked—power quality phenomena. While these events often remain within “acceptable” voltage limits, they can still trigger customer complaints, equipment malfunctions, and flicker-related issues that are difficult to explain or defend without the right data.
This white paper breaks down what Rapid Voltage Change really is, how it differs from voltage sags and transients, and how modern power quality monitoring tools can reliably capture and identify these events before they escalate into persistent customer problems.
Key topics include:
- Measurement and Triggering
- Customer Symptoms and Flicker
- Common Causes of RVC
- Comparison with Voltage Sags
- Measurement and Analysis
- RemmediationStrategies
Why utilities should care:
Rapid Voltage Change often occurs without ever crossing a reportable voltage threshold, yet it is a frequent driver of flicker complaints, lighting disturbances, and unexplained equipment behavior. When these events go unmeasured, utilities are left defending “normal” voltage readings while customers continue to experience real impacts. Understanding how Rapid Voltage Change behaves—and how to identify it correctly—allows utilities to confidently explain system performance, separate normal operations from problematic conditions, and address customer concerns before they escalate into ongoing complaints or regulatory scrutiny.
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