【单选题】【消耗次数:1】
TN-C系统是三相五线制供电系统。( )
正确
错误
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相关题目
【判断题】 TN-C的意思是三相五线制
①  正确
②  错误
【判断题】 TN-S表示三相五线制
①  正确
②  错误
【判断题】 TN-S方式供电系统是把工作零线?N?和专用保护线?PE?严格分开的供电系统,称作?TN-S?供电系统。
①  正确
②  错误
【单选题】 TN-C方式供电系统是用工作零线兼作接零保护线,可以称作保护中性线。
①  正确
②  错误
【判断题】 在三相四线制低压供电系统中,为了防止触电事故,对电气设备应采取保护接地措施。
①  正确
②  错误
【单选题】 在 TN 系统中,系统的中性点不接地或经阻抗接地,不引出 N 线,属三相三线制小电流接地系统。
①  正确
②  错误
【单选题】 TN-C表示
①  三相三线制
②  三相四线制
③  三相五线制
④  三相六线制
【判断题】 TN方式供电系统是将电气设备的金属外壳与工作零线相接的保护系统,称作接零保护系统,用?TN?表示。
①  正确
②  错误
【单选题】 380/220V系统的三相四线制,中线截面为相线的( )
①  0.5倍
②  3倍
③  2倍
④  1倍
【判断题】 系统电压220V是指三相四线制接线中相线对地电压。
①  正确
②  错误
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