In delta systems, the voltage across the windings is always what in relation to the line-to-line voltage?

In delta systems, the voltage across each winding is equal to the line-to-line voltage. This is due to the configuration of the delta connection, where each winding is connected between two of the three phase lines. As a result, there is no transformation of voltage across the windings themselves; the phase voltage in a delta configuration is directly the same as the voltage when measured between the two corresponding lines.

When comparing the winding voltage with line-to-line voltage in a delta system, it is clear that they share the same magnitude, reinforcing that the winding voltage is equal to the line-to-line voltage. This understanding is crucial for analyzing and troubleshooting three-phase systems, as it impacts calculations related to power, current, and impedance within the circuit.

It's important to note that in other configurations, such as wye (or star) connections, the relationship can differ; in wye, the phase voltage is actually lower than the line-to-line voltage due to a factor of the square root of three. Understanding these distinctions helps in effectively working with three-phase power systems.