Katsumi Watanabe

Title: Katsumi Watanabe: Inventor of an Earth Leakage Breaker

Introduction

Katsumi Watanabe is an inventor associated with Fuji Electric Co., Ltd. in Tochigi, Japan. His recorded patent concerns an earth leakage breaker designed to distinguish dangerous electrical faults from impulsive grounding currents caused by lightning surges.

Latest Patents

Watanabe’s listed patent is titled “Earth leakage breaker.” The invention uses multiple comparators, a monostable multivibrator, a counter, and a trip-signal generator to identify whether grounding current results from a lightning surge, leakage, or a heavy ground fault. By distinguishing lightning-induced impulses from fault conditions, the breaker helps avoid unnecessary interruption while still generating a trip signal for leakage and heavy ground faults. Watanabe is credited with 1 patent in the provided information.

Career Highlights

Watanabe’s documented contribution focuses on electrical protection technology. The earth leakage breaker addresses the challenge of maintaining reliable protection without needlessly tripping in response to lightning-related current surges.

Collaborations

Watanabe is associated with Fuji Electric Co., Ltd. His listed coworkers include Kiyoshi Tanigawa and Shoji Sasaki.

Conclusion

Katsumi Watanabe’s recorded invention applies circuit-comparison and timing techniques to help earth leakage breakers distinguish lightning surges from hazardous electrical faults.