What does a bushing CT fit around?

A bushing current transformer (CT) is specifically designed to fit around a high-voltage bushing. Bushings are insulating devices that allow electrical conductors to pass through grounded barriers, such as those found in transformers and circuit breakers. The CT is installed around the bushing, allowing it to measure the current flowing through the high-voltage equipment without needing to disconnect it from the system. This design provides the advantage of monitoring the electrical parameters in a safe and effective manner while maintaining the integrity of the high-voltage system. Thus, the correct choice highlights the exact piece of equipment the bushing CT interacts with for current sensing.