| 摘要 |
An apparatus for measuring a current using a Rogowski sensor is provided to decrease a manufacturing cost of a circuit breaker by changing a resistance instead of the Rogowski sensor. An apparatus for measuring a current flowing through an electric line includes a Rogowski sensor and an output current regulator(130). The Rogowski sensor is composed of the same coil winding numbers irrespective of a specific current flowing through the electric line, and induces a voltage by differentiating the current detected from the electric line. The output current regulator divides the induced voltage from the Rogowski sensor by using a voltage dividing resistor and regulates an output voltage. The voltage dividing resistor includes plural resistors. An integrator(150) is connected to a common node between first and second resistors in the voltage dividing resistor. |
