【判断题】
交流高压真空接触器的真空开关管 (灭弧室 )的动、静触头一般采用圆盘形触头。 ()
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相关试题
【判断题】
交流高压真空接触器利用分闸弹簧的作用力分闸。 ()
【判断题】
手车式开关柜的断路器 ,手车在接地开关合闸位置时可自由移动。 ()
【判断题】
隔离开关手力操动机构在操作时 ,操作质量不受操作人员技术水平的影响。 ()
【判断题】
箱式变电站所使用的变压器一般采用 S11 型及以上节能型变压器。 ()
【判断题】
高压开关柜传感器损坏的常见故障原因为内部高压电容击穿。 ()
【判断题】
高压开关柜防带负荷拉、合隔离开关的闭锁功能不属于“五防”联锁功能。 ()
【判断题】
高压电容器的瓷套管发生严重放电、闪络时 ,只要加强监视 ,不需要将电容器立即退出运行。 ()
【判断题】
六氟化硫 (SF6)断路器低气压闭锁装置动作后 ,仍可以进行分、合闸操作。 ()
【判断题】
因真空断路器的触头设置在真空灭弧室内 ,所以
【判断题】
新装电容器组投运前 ,应检查电容器的额定电压是否与电网电压相符 ()。
【判断题】
保护电压互感器的高压熔断器额定电流一般小于或等于 1A。()
【判断题】
环网柜的高压母线截面积 ,应根据本变电所负荷电流和穿越电流之和进行选择。 ()
【判断题】
高压电容器的保护熔丝熔断后 ,应立即更换熔断器 ,使电容器能尽快恢复运行。 ()
【判断题】
备用电源自动投入装置属于自动调节装置。 ()
【判断题】
在中性点非直接接地的电力系统中广泛采用两相不完全星形接线方式来实现相间短路保护。 ()
【判断题】
时间继电器的延时动合接点是指继电器通足够大的电时瞬时闭合的接点。 ()
【判断题】
在原理图中 ,各继电器的线圈和触点分开 ,分别画在它们各自所属的回路中 ,并且属于同一个继电器或元件的所有部件都注明同样的符号。 ()
【判断题】
继电保护装置的任务之一是当电力系统中某电气元件发生故障时 ,保护装置能自动、迅速、有选择地将故障元件从电力系统中切除。 ()
【判断题】
一相绕组的匝间短路属于高压电动机的故障。 ()
【判断题】
低压侧接地保护是站用变保护测控装置在保护方面的一项功能。 ()
【判断题】
变电所中 ,断路器控制所使用的电源称为操作电源。 ()
【判断题】
电流继电器的返回电流除以动作电流 ,叫做电流继电器的返回系数。 ()
【判断题】
高压侧接地保护不是站用变保护测控装置在保护方面的一项功能。 ()
【判断题】
低电压保护是高压电动机的主要保护。 ()
【判断题】
变压器的故障可分为油箱内和油箱外两种。 ()
【判断题】
过负荷保护功能不属于 110kV 及以下线路保护测控装置在保护方面的主要功能。 ()
【判断题】
能使继电器动断接点由断开状态到闭合状态的最大电压称为动作电压。 ()
【判断题】
运行过程中易发生过负荷和需要防止起动或自起动时间过长的电动机应装设过负荷保护。 ()
【判断题】
电流互感器可分为单相式和三相式。 ()
【判断题】
变电所中 ,信号设备所使用的电源为操作电源。 ()
【判断题】
电力线路过电流保护的动作电流按躲过最大负荷电流整定。 ()
【判断题】
1000kW 以下的高压电动机 ,装设电流速断保护时宜采用两相不完全星型接线并动作于跳闸。 ()
【判断题】
电力系统频率自动调节属于自动调节装置。 ()
【判断题】
高压电动机纵差动保护工作原理与变压器纵差动保护相似。 ()
【判断题】
反时限过电流保护其动作时间随电流的大小而变化 ,电流越大动作时间越短 ,电流越小动作时间越长。 ()
【判断题】
高压电动机发生单相接地故障后 ,必须将其切除。 ()
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A. is
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C. see
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