What capacity does a sectionalizer have to interrupt?

A sectionalizer is a protective device used in electrical distribution systems to interrupt current flow in the event of a fault condition. The capacity at which a sectionalizer can interrupt refers to its rated breaking capacity, which is determined by the manufacturer's specifications.

The correct answer indicates that the sectionalizer's interrupting capacity is equal to its rating, meaning it is designed to handle fault currents up to that specified limit without damage to the device itself. This is crucial for ensuring reliability and safety in the electrical system, as it ensures the sectionalizer can effectively isolate a fault without risking failure or creating additional hazards.

Understanding that the interrupting capacity is equivalent to its rating is fundamental in selecting and employing sectionalizers appropriately in the field, ensuring that they will function as intended in the event of system disturbances.