Norio Fujisawa

Title: Norio Fujisawa: Innovator in Protective Relay Systems

Introduction

Norio Fujisawa is a notable inventor based in Fuchu, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of protective relay systems for power transmission networks. With a total of 3 patents, Fujisawa's work has had a considerable impact on the safety and efficiency of electrical systems.

Latest Patents

Fujisawa's latest patents include a ROM Controlled Protective Relay System for Power Transmission Networks. This digital protective relay system utilizes a read-only memory (ROM) to store a program that executes calculations based on a judgment formula for protective relay functions. The system allows for the switching of judgment formulas, such as from overcurrent protection to undervoltage protection, through a setting unit and an operation mode switching unit. This innovation enables the adjustment of relay operation threshold values without altering the ROM program.

Another significant patent is the Relay Device, which protects and controls an electric power line by detecting electrical quantities carried by the line. This device features a rectifying circuit connected to the electric power line, which feeds into a peak value holding circuit. This circuit stores the peak value of the output during predetermined periods, controlled by a resetting pulse, and supplies it to a detecting circuit with a predetermined threshold level.

Career Highlights

Fujisawa is currently employed at Tokyo Shibaura Denki Kabushiki Kaisha, a company known for its advancements in electrical engineering and technology. His work has been instrumental in enhancing the reliability and safety of power transmission systems.

Collaborations

Fujisawa has collaborated with notable colleagues, including Eiichi Okamoto and Masao Hori. Their combined expertise has contributed to the successful development of innovative technologies in the field.

Conclusion

Norio Fujisawa's contributions to protective relay systems exemplify his commitment to advancing electrical engineering. His patents reflect a deep understanding of the complexities involved in power transmission safety. Through his work, Fujisawa continues to influence the industry positively.