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热词
    • 20. 发明授权
    • Fireguard circuit
    • 防火电路
    • US07525777B2
    • 2009-04-28
    • US10886269
    • 2004-07-07
    • Victor V. Aromin
    • Victor V. Aromin
    • H02H3/00H02H9/08
    • H02H1/0015H02H7/222H02H7/228
    • A fireguard circuit for a power cable, which comprises a power line, a neutral line and a metal sheath surrounding the power line and the neutral line, includes a switch located in one of the lines. A solenoid sets the switch in either an open position or a closed position. A first silicon controlled rectifier (SCR) causes the solenoid to open the switch upon detecting the presence of an arcing condition between the power line and the metal sheath. A second silicon controlled rectifier (SCR) causes the solenoid to open the switch upon detecting the presence of an arcing condition between the neutral line and the metal sheath. The second SCR is connected in parallel with the first SCR, the anode of the first SCR being connected to the cathode of the second SCR and the cathode of the first SCR being connected to the anode of the second SCR.
    • 用于电力电缆的防火电路包括电源线,中性线和围绕电力线和中性线的金属护套,包括位于一条线路中的开关。 螺线管将开关置于打开位置或关闭位置。 当电源线和金属护套之间检测到电弧状态时,第一个可控硅整流器(SCR)使螺线管打开开关。 第二个可控硅整流器(SCR)使得螺线管在检测到中性线与金属护套之间存在电弧状态时打开开关。 第二SCR与第一SCR并联连接,第一SCR的阳极连接到第二SCR的阴极,第一SCR的阴极连接到第二SCR的阳极。