Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz and 1,6 MHz to 30 MHz -- Part 4-7: Portable low voltage decoupling filters - Safety requirements
频率范围为3kHz至148.5kHz和1.6MHz至30MHz的低压电气装置上的信号发送第4-7部分:便携式低压去耦滤波器安全要求