NCCER Electrical Level 3 Module 6 Distribution Equipment Practice Test

The standard output voltage of a potential transformer when connected phase-to-phase is typically 120 volts. Potential transformers are used in electrical systems to step down high voltages to lower levels that are safer and easier to measure.

When connected phase-to-phase, they provide a reduced voltage that corresponds to common voltage levels found in various systems, such as 120/240V or 120/208V systems. In a system where the line voltage is 240V, the phase-to-phase output from a potential transformer is often standardized to 120V. This makes it easier to interface with equipment and measurement devices that operate on a 120V scale.

Understanding this concept is crucial for electrical professionals, as it ensures proper measurements and safe operations when working with various voltage levels in distribution equipment.