... : GB14048.9 "Low-voltage switchgear and control equipment, multi-function devices (or equipment) Part 2: Control and protective switching devices (or equipment)", ... is mainly used for AC 50Hz (60Hz), rated voltage up to 690V, rated current from 0.16A to 125A of ... contact interaction with the main circuit, with electrical control and indication function, divided by the number of contacts on a variety ...