hv high voltage 中文意思是什麼
hv high voltage
解釋
高壓-
High - voltage transmission line, hv transmission line
為了研究高壓輸電線路 -
The high - voltage flameproof switchgear is a key apparatus for 6kv - power supply system in underground mines. the switchgear is used for supplying power energy to hv working machinery or next lv distribution station in coalface
煤礦井下6kv電網防爆開關是礦井供電系統的關鍵設備，它負責向工作面和掘進面的工作機械提供電能。 -
This paper introduce, now in electrical system, the high - voltage tests include part - charge test for transformer, ac withstand voltage test for transformer, ac withstand voltage test for switch, ac withstand voltage test for hv cable, when the tests is on, the power sup - - ply will be too poor
文中就當前電力系統中的一些現場高壓測試所面臨的試驗電源問題，這些試驗包括變壓器的局部放電和交流耐壓試驗、高壓開關、高壓交聯電纜、 gis等的交流耐壓試驗，提出採用新型變頻電源對高壓設備進行測試。 -
Routine maintenance of high - voltage （ hv ） circuit breaker is very time consuming and resource hungry. the traditional scheduled maintenance or time based maintenance ( tbm ) has some serious defects, such as sub - maintenance, over - maintenance and the faults caused by the maintenance itself
我國目前採用的「到期必修」的計劃檢修體制存在著嚴重的缺陷，如臨時性維修不足，維修過剩，盲目維修和因檢修不當而引發檢修事故。 -
According to the present actual underground power system which neutral point is grounded through arc suppression coil in many supper big shaft, the development history and present situation of synthetic protection system used in hv flameproof switchgear are reviewed, and on the basis of analyzing the problems existed in high voltage flameproof switchgear, the selective leakage protective method based on the detecting harmonic direction of zero sequence current as well as the value of zero sequence voltage is proposed in this paper, and at the same time, harmonics extracting schematic and transforming circuit are also designed
本文深入系統地研究了基於intel80c196kb單片機控制的6kv防爆開關綜合保護系統，主要內容如下：針對大型及特大型礦井供電系統中性點普遍採用消弧線圈接地方式的現狀，回顧了國內外礦用高壓防爆開關保護系統的發展歷史，分析了目前國內高壓饋電開關保護系統所存在的問題，提出了「基於零序電壓基波啟動，五次諧波功率方向比較」的選擇性漏電保護原理，設計了相應的五次諧波提取電路和功率方向鑒別電路。
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