The switch with half sealed structures is made up of two parts: the seat and the cover (melt-loading device). The front cooperation can observe the rated data of the fuse links and indicator status. MRO.H1(DR1)-160 is single phase, can be matched with 000 and 00 fuses. MRO.H1(DR1)-160 with three-phase abreast structure, can be matched with 000 and 00 fuse. MRO.H1(DR1)-250/1, MRO.H1(DR1)-400/1, MRO.H1(DR1)-630/1 are single phase, can be matched with 1, 2 and 3 fuse respectively. MRO.H1(DR1)-250, MRO.H1(DR1)-400, MRO.H1(DR1)-630 with three-phase abreast structure, can be matched with 1, 2 and 3 fuse respectively. Above switches with three-phase abreast structure can be assembled with the single phase, which makes four-phase abreast structure.The switch has the features of small volume, reliable operation, convenient fuse install and removal and small-require manual operation power.
MRO.H1(DR1) series of fuse disconnecting switch, are mainly used in circus with high short-circuit current and motor
circuit as power switch, disconnecting switch or emergency switch and for AC protection. MRO.H1(DR1) is unfit for directly opening and shutting single electric motor.Rated insulation voltage up to AC 50Hz 800V; Rated working voltage up to 690V; Rated working current up to 630A. Rated limiting short-circuit is 100kA at the voltage of 500V and 50kA at 690V. The switch complies with GB14048.3 and IEC/EN60947-3.
