1General HR5 Series fuse type isolating switch (hereinafter called switch) is mainly used in distributing circuit and motor circuit which have high short-circuit current with rated voltage AC 380V and 660V (45-62Hz), rated heating current up to 630A, it is acted as power switch, isolating switch and emergency switch as well as circuit protection but normally it is used to open and close a single motor directly. This product is in conformity to standard GB14048.3-2002. 2 Principal Technical Parameter 2.1 Rated Insulating Voltage: 690V 2.2 Rated operating voltage: 380V,660V 2.3 Rated Operating Current: 380V: 100A,200A ,400A, 630A 660V: 100A, 200A , 315A , 425A 2.4 The mechanical of the switch is 3000 times(100A,200A)and 1000 times(400A,630A) 2.5 The electrical life of the switch : 600 times(100A, 200A)and 200 times(400A, 630A) 2.6 Rated operating voltage of the auxiliary switch (Lx19k)is AC 380V,rated heating current is 5A,rated control capacity is 300VA.