The Technology OG Measuring And Controlling In The Test Of Circuit Breaker's Instantaneous Behavior

In the experiment of testing instantaneous characteristics for circuit breaker, the transient current exists in the experimental circuit because of the closing making angle, which has serious influence on the testing precision. In order to eliminate the transient current and ensure the test precision, this paper introduces the principle and the method of phase selection of the AC based on FFT(Fast Fourier Transform Algorithm) .The method of changing the transformer's ration and power regulating voltage are used in order to yield various levels of testing current accurately and quickly. The location device has added to the voltage regulator, changing the switch control to the continuous control, consequently the static and dynamic characteristic of the system is improved.The circuit breaker's instantaneous characteristics test equipment controlled by computer is introduced at the end of this paper. It is the integrated equipment which can control, check and process the data, display the wave.