Which voltages are available in a primary system rated at 24940 volt 3-phase 4-wire?

In a primary system rated at 24,940 volts, specifically a 3-phase 4-wire system, the voltages primarily found in this configuration refer to the typical line-to-neutral and line-to-line voltages associated with electrical distribution systems. The 24,940 volts is a standard higher voltage distribution level used for long-distance transmission and can be derived from the other common voltages available in the system.

The 14,400 volts mentioned is a common lower line-to-line voltage level often used in distribution systems and represents a stage of the system allowing for easier use in local distribution, while the primary system operates at the higher voltage of 24,940 volts. This combination is practical for step-down transformations to lower voltages suitable for residential or commercial applications.

Other options imply voltage levels that don't correspond with typical values used in such a configuration, as they fail to include both the correct primary system voltage and its standard lower voltage counterpart. Thus, the combination of 24,940 volts and 14,400 volts accurately reflects what is available in a primary system designed for efficient power distribution while complying with industry standards.