ELECTRONIC TRIP UNIT VL 630 4-POLE, PLANT PROTECTION ETU20, LSI IR= 252...630A, OVERLOAD PROTECTION, ISD=1.5 TO 9 X IR, II=10 X IN SHORT-CIRCUIT PROTECTION, N-PROTECTED SCREW CONNECTIONS INCLUDED IN SCOPE OF SUPPLY OF CONTACT UNIT MARINE APPROVAL FOR LRS, DNV AND GL