【单选题】
我国早期继电器产品中,时间继电器的型号是___。
A. DL-11/10;
B. DJ-11/60;
C. DS-111;
D. DZS-115;
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答案
C
解析
暂无解析
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D. 后续保护;
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在电力线路运行中,为了弥补主保护性能不足而专门装设的保护称为___。
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B. 零序电压;
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B. 时间越长;
C. 越可靠;
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定时限过流保护在35kV以上回路中或大容量重要元件上,广泛用于___。
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定时限过流保护用在单电源辐射形线路上能保证动作的( ),但在两端电源的线路上则不能保证动作的___。
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方向元件反应___方向,只有当短路( )有母线流向线路是,相应的保护才能动作。
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反应相间短路的功率方向继电器采用___接线方式。
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瞬时电流速断保护的缺点是___
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瓦斯继电器的开口杯可反映变压器内部___故障动作于气体容积。
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