软起动器-PST30…300/PSTB370…1050400-690V型号PST30-690-70PST37-690-70PST44-690-70PST50-690-70PST60-690-70PST72-690-70PST85-690-70PST105-690-70PST142-690-70PST175-690-70PST210-690-70PST250-690-70PST300-690-70PSTB370…PSTB1050(内置旁路接触器)PSTB370-690-70PSTB470-690-70PSTB570-690-70PSTB720-690-70PSTB840-690-70)