| 摘要 |
PURPOSE:To make it possible to obtain a small and inexpensive light wt. voltage-dividing trial apparatus, by realizing the input and output characteristics of the voltage- dividing trial apparatus such as the protective relay in an electric power system by electronic circuit constitution such as an operation circuit equipped with characteristics equivalent to an apparatus subjected to circuit constitution by actual elements. CONSTITUTION:The voltage of a trial system taken in by an input transformer, that is, secondary rated voltage v0 is inputted to a gain circuit 6, BPF7 and LPF8 connected parallel and constant output signals e1-e3 from these circuits are introduced into an adder circuit 9 to perform the operation of e1+e2-e3. This operation specifies the condition to be used of an apparatus to be tested and voltage and frequency to be tried are imparted. The output of the adder circuit 9 is amplified up to a level fitted to the rated voltage of the product to be tested by an amplifier 4. The characteristic formula in the relation of the operation output of the adder circuit 9 and the rated voltager v0 is perfectly equal as compared with a conventional voltage-dividing trial test, and a small and inexpensive trial apparatus having equal characteristics with respect to its stationary and transient capabilities can be realized by electronic circuit constitution such as an operation circuit. |
