White paper shows how LTC improves power factor
An
Eurotherm product story
Edited by the Engineeringtalk editorial team
Sep 8, 2009
Eurotherm has published a white paper showing manufacturers how the Epower automatic load tap changer (LTC) can improve the power factor in their processes.
The Epower LTC can reduce or eliminate harmonic distortion caused by phase angle firing to increase and maintain the power factor and reduce energy usage and operating expenses.
As a result of the nature of the load or for convenience, the power controller utilises its LTC function to automatically switch from one tap to another, based on a transformer's unique input signal and internal feedback.
With multiple configurations available from two taps to four taps on either the primary or secondary side of the transformer, the LTC achieves all application requirements and eliminates the need for mechanical moving parts and intervening plant personnel to change taps.
According to the white paper, a comparison of the effect of the LTC on the power factor and total harmonic distortion (THD) for three taps (240VAC, 360VAC and 480VAC) versus a traditional phase angle solution shows a rise in power factor from 60 per cent to 92 per cent and THD reduced from 79 per cent to 16 per cent.
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