BS EN 60255-11. Measuring relays and protection equipment. Part 11. Interruptions to and alternating component (ripple) in A.C. and auxiliary energizing input of measuring relays and protection equipment D.C
BS EN 60255-11 测量继电器和保护设备 第11部分 测量继电器和保护设备直流交流和辅助通电输入的中断和交流分量(纹波)