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IEEE Recommended Practice for Developing Short-Term Overexcitation V/Hz Curves for Transformers Directly Connected to Generators
New IEEE Standard - Active.
The recommended process and criteria for developing V/Hz curves for relay protection purposes for power transformers directly connected to generators are provided in this recommended practice.
This recommended practice applies to *liquid-immersed power transformers* that are connected to generators subjected to significant short duration increases in the volts per hertz (V/Hz) ratio.
The main purpose of this recommended practice document is to provide a procedure for developing design-specific V/Hz operational limits versus time curves for users of power transformers directly connected to generators.
More accurate and more design-specific V/Hz curves should aid users in the proper design and settings of protective relay protection systems of power transformers.
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