The utility model relates to a three-phase power monitor. 该三相电力监测仪包括电流采样模块,电压采样模块和RS485通讯接口,其特征在于,还包括专用电能芯片,中央处理器,显示模块,电力载波通信模块,所述专用电能芯片分别与所述电流采样模块,电压采样模块,中央处理器电连接,所述中央处理器分别与所述电力载波模块,RS...
A three-phase power monitor operates a contactor between a supply of three phase electrical power and a three phase load. A phase integrity detector has three inputs connected respectively to the three phases of the electrical power. If a loss, reversal, or dissymmetry is detected, a photoemit...
HRJDT-604 voltage monitor recorder HREC-1高压核相器 HREC-1 type of high pressure jer phase detectors HREC-11无线高电压核相器 Wireless voltage nuclear phase-HREC-11 HRWG-11交流低零值绝缘子带电检测仪 The exchange value of low-insulator charged detector HRWG-11 HRWG-12交流线路绝缘子串电压分布测...
专利名称:Three phase power monitor 发明人:Andrew S. Kadah,Andrew M. Nguyen 申请号:US07/775540 申请日:19911015 公开号:US05337206A 公开日:19940809 专利内容由知识产权出版社提供 摘要:A three-phase power monitor operates a contactor between a supply of three phase electrical power and a three...
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In conducting the phase three review, the Administration [...] has followed the same approach as that adopted in the phase one and phase two reviews. legco.gov.hk legco.gov.hk 在進行第三階段檢討時, 當局一直依循第一階段及第二 階段檢討所採用 的 方針。 legco.gov.hk legco.gov.hk The ...
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The system current monitor supplies a discharging voltage during improper phase sequence to prevent triggering. Triggering of the oscillator and the subsequent gating of the thyristor indicate there are no lost or reversed phases in the three-phase system. ...
which is always zero. A circuit of this kind cannot yet be used to monitor the phase sequence because the vector sum is zero regardless of the sequence of the phases. When in this circuit a modification is made consisting of forming, e.g. from the S vector, an extra component S' lagge...