Why OLTC Monitoring in Transformer
On-load tap changers (OLTCs) are among the most vital transformer components that ensure output voltage regulation by modifying the transformer’s winding turns ratio under load. They carry out continuous operations in order to keep voltage stable on the grid.
But OLTCs also cause close to 30% of all transformer failures, emphasizing the significance of timely condition monitoring and predictive maintenance. Provided they are used within design ratings and maintained properly, OLTCs can guarantee stable operation and prolong the life of the transformer.
Why Rugged Monitoring-
Monitoring On-Load Tap Changers (OLTCs) is critical as they are among the most stressed transformer components. Load switching continuously results in contact wear, arcing, and oil degradation, promoting higher resistance and localized heating. Monitoring of parameters such as switching time, transition impedance, tap position, temperature, and dissolved gases in real-time aids in identifying early symptoms of malfunction.
It also reveals mechanical problems like motor stress or wear on gears. Proper OLTC monitoring guarantees stable voltage regulation, minimizes failure threats, and enables condition-based maintenance to achieve longer transformer life.
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What We Monitor-
