Abstract In the rapid development of China’s power system, number applications high-voltage switchgear is increasing. Every year, tens thousands are put into industry. Since performance and quality directly determines operation efficiency system has a positive impact on safety production effective supply grid scholars from all over world have gradually strengthened research insulation failure c...

a unique high frequency transient overvoltage surge suppressor for the protection of motors and transformers from steep wave-front, short rise-time, high magnitude, spikes, surges and other transient voltages, generated by switching, lightning and other sources. The protective characteristics of ZORC: Eliminates inter-turn insulation failures Extends the life of machine insulation Eliminates mu...

The traditional high voltage switchgear (HVS) state evaluation model mostly adopts electrical test, live detection and historical data, neglecting the influence of real-time operation data HVS composition equipment on results. This paper proposes a based fuzzy set-valued statistics method kernel vector space test on-line monitoring data. First all, according to components switchgear, is describ...

In this paper, we study the use of a waveguide for IEC61850 communication using 802.11a radio. In particular the communication latency is analyzed. The latency of the system will depend on the traffic load and, thus, several test cases with different load are analyzed. In the paper we also describe a pilot installation commissioned at LyondellBasell Industries. The installed switchgear equipmen...

Three cases of male breast cancer were diagnosed among a small group of men who worked in a basement office of a multi-story office building. This office was adjacent to an electrical switchgear room which generated high magnetic fields in their work space. The risk of male breast cancer in this group was increased about 100-fold (observe three cases, expect 0.03 cases; P < 0.00001). Since 1991...

Arcing faults are a great concern in any electrical installation. However, and despite all precautions, the probability of occurrence can't be equal to zero. The paper discusses situations, effects and how mitigation of these effects can be seeked through design choices during the design stage of the installation. Arc-proof switchgear is contributive, but can't address all the situations, nor c...

This document describes the utilization of the nonconventional measurements and advanced features of IEC 61850 standard for substation automation systems, especially how sampled value sending according standard part 9-2 can be used between IEDs in mediumvoltage substation to improve the reliability and functionality of the system. Calculated results indicate improvements on availability, perfor...