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DNH7 series NH fuse switch disconnector is applicable to high short circuit current circuit with AC 50(60)Hz, voltage up to 660V and rated working current
up t0 630A. Fuse Switch disconnector possesses upper and lower end input and output structure. Lead in equipment with knife-edge and arc
extinguishing equipment, and also can be operated with load. It is used as power switch, fuse switch disconnector and emergency switch, and for
protecting current.
Parameter
Model DNH7-160 DNH7-250 DNH7-400 DNH7-630 Fuse NH00(NT00) NH1(NT1) NH2(NT2) NH3(NT3) Rated operational voltage 400V 400V 400V 400V Max current 160A 250A 400A 630A Rated insulation voltage 1000V Rated impulse withstand voltage 8000V Fuse protected short circuit making 50kA/ms Rated making and breaking capacity AC22B AC22B AC22B AC22B Rated frequency Hz 50/60 50/60 50/60 50/60 Power loss at Im without fuse-link/phase W 12W 23W 34W 48W Degree of protection IP20 IP20 IP20 IP20 
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