Masao Hori

TL;DR: In this article, the authors proposed a differential backup protection for a busbar and transmission circuits connected to that busbar on an inter-station or wide-area basis, which can operate better than conventional systems with respect to operation time, section selectivity, etc.

TL;DR: In this paper, the authors proposed wide-area current differential backup protection utilizing broadband packet communications and time synchronous systems for achieving better selectivity, smaller outage areas and faster operation times than conventional distance backup protection, experimental microprocessor-based protection devices have been examined with respect to both telecommunication and protection functions.

TL;DR: In this paper, a lamp body is mounted on sockets 102 of an apparatus body 100 and a feeding unit 8 configured to feed power to LEDs 2 is provided on the back side facing the lamp body.

TL;DR: In this article, the authors proposed a wide-area protection system, having a main protecting function and a total protecting function over an electric power system over a wide area, where each terminal device (RTE) fetches a current of each part of an electrical power system from current transformers(CT) 14-1 to 14-4, 15- 1 to 18-1, based on sampling timing distributed from a time synchronous network (STE) 201 also fetching voltage of each bus bar 11A to 11E from current transformer (PT) 21 to 25, transm

TL;DR: In this paper, the authors proposed a mechanism to detect an operation of a follow current block type arc horn without providing an operation detection circuit for the following current block types arc horn and is capable of preventing an unnecessary trip command from being sent out.