Difference between current sensor and current transformer

Release time:

2025-03-21

Both current sensors and current transformers monitor current in power systems, but there are significant differences.

Difference between current sensor and current transformer

Both current sensors and current transformers monitor current in power systems, but they have significant differences. Current sensors are mainly used for precise current measurement and have linear response characteristics, allowing direct connection to secondary instruments. They can also withstand overload currents and offer high accuracy and stability. Current transformers, on the other hand, primarily provide electrical isolation for power systems, converting high currents into low currents for measurement and protection. Their main characteristics are current and voltage transformation, operating on the principle of electromagnetic induction. Therefore, the two differ in function, application, and operating principle.