Company Filing History:
Years Active: 1985-1990
Title: Innovations of Inventor Hung J Li
Introduction
Hung J Li is a notable inventor based in Coral Springs, FL (US). He has made significant contributions to the field of electrical engineering, particularly in the development of protective relay systems. With a total of 6 patents to his name, his work has had a profound impact on power system network safety and efficiency.
Latest Patents
One of his latest patents is the "Sudden Pressure Relay Supervisory Apparatus." This apparatus is designed for the supervision of a sudden pressure relay (SPR) system that protects power system network transformers. It addresses the challenges associated with overcurrent supervision for multiple-winding transformers. The apparatus employs a maximum restraint signal selection network, which differentiates between high and low current levels across all transformer windings. This innovation allows for a single measuring unit per phase, enhancing the efficiency of the supervisory unit in blocking the SPR from operating the breakers during non-critical conditions.
Another significant patent is the "Directional Comparison Blocking Protective Relay System." This system includes forward-looking pilot relays at each terminal of a protected line segment. It monitors predetermined incremental changes in line currents and voltages that indicate faults. The system generates local blocking signals that are transmitted to the other terminal as remote blocking signals. This ensures that circuit breakers at both terminals are tripped simultaneously when an internal fault is detected, while also preventing overtripping during transient fault clearing.
Career Highlights
Hung J Li is currently employed at Westinghouse Electric Corporation, where he continues to innovate in the field of electrical engineering. His work has been instrumental in enhancing the reliability and safety of power systems.
Collaborations
He has collaborated with notable coworkers such as Deborah K Mort and James P Garrity, contributing to various projects that advance the field of electrical engineering.
Conclusion
Hung J Li's contributions to the field of electrical engineering through his innovative patents demonstrate his commitment to improving power system safety and efficiency. His work continues to influence the industry positively.