Which outcome occurs when a three-phase transformer bank experiences an open delta configuration due to a failed transformer?

💡 Explanation

When one transformer fails creating an open delta configuration, the remaining two transformers must supply all the load, causing reduced capacity and increased voltage and current imbalance because the system is no longer symmetrical. Therefore, reduced capacity and imbalance results, rather than balanced voltage, overvoltage, or harmonic reduction which require other conditions.

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