What is a key requirement for reporting voltage changes associated with a transformer tap position?

The key requirement for reporting voltage changes associated with a transformer tap position is a voltage level of at least 230 kV. This standard is important because monitoring voltage levels at higher thresholds ensures that significant deviations or adjustments in the power system are accurately documented and managed.

At voltages above this threshold, even small changes in tap positions can lead to substantial variations in the system's overall voltage profile, potentially affecting reliability and stability. Reporting these changes helps grid operators and engineers maintain effective oversight over the functioning of the transformer and the transmission network as a whole.

While other voltage levels are important in different contexts or regulations, 230 kV is specifically identified as the threshold for reporting in relation to transformer tap adjustments.