ELECTRONIC TRIP UNIT VL 1600 4-POLE, PLANT PROTECTION ETU20, LSI, IR= 640...1600A, OVERLOAD PROTECTION, ISD=1.5 TO 8 X IR, II=9 X IN SHORT-CIRCUIT PROTECTION, N-PROTECTED SCREW CONNECTIONS INCLUDED IN SCOPE OF SUPPLY OF CONTACT UNIT MARINE APPROVAL FOR LRS, DNV AND GL