Drop-out fuse [RW11-12 / 100A, RW3-12 / 100A] works to pull the load drop fuse increases the flexibility of the auxiliary contacts and interrupter cover for division and load current. Drop-out fuse in normal operation, the fuse tube by means of a fuse to form a closed position after tensioning. When the system fails, the fault current to fuse rapidly fuse, parallel to the arc, arc tube by electric arc burning, decomposition of large amounts of gas, so that the formation of high pressure in the pipe, and strong vertical blowing along the pipeline, the arc is elongated quickly extinguished. After the fuse is blown, the lower stationary contact loses tension and the next turn, so tightening mechanism is released fuse tube, fuse tube drop in sharp breaking position. When you need to pull the load, with insulating rod pull the moving contact, when active, static contact is still in contact with the insulating rod pulling continue contacts, auxiliary contacts are separated between the head arc, arc interrupter cover the slit is elongated, while the arc chute produce gas in the current zero, the arc is extinguished. Drop-out fuse [RW11-12 / 100A, RW3-12 / 100A] Installation Requirements fuse should be mounted vertically, to prevent arcing fly near the live parts. Fuses should be in a straight line with the fixed contact, no contact with the tilt. Drop-out fuse, the melting tube axis and the vertical line should a 15 ~ 30 °, its rotating part flexible, and should not touch other objects when dropped. Fuse specifications should meet the design requirements, there should be no bending or flattening damage, the fusible element and the contact pressure should be snug. It must be marked Fuses and fuse element (wire or film) rated current capacity shall comply with the requirements of the fusible element of the protected appliances, rated current without parity, or no marked melting pieces are not allowed to use. Drop-out fuse [RW11-12 / 100A, RW3-12 / 100A] technical performance product performance in line with national standards and IEC282-2 GB15166.3-94 technical requirements of international standards. Drop-out fuse use of environmental conditions 1, the product under normal use conditions: a) ambient air temperature: up to + 40 ℃, lower limit of -30 ℃ b) Altitude less than 1000m c) Maximum wind speed does not exceed 35m / sd) no recurrent severe shock 2, the product is not available for the following places: a) there is a fire or explosion hazard place b) have severe vibration or shock place c) a conductive, chemical gas effect and severe contamination (no more than contamination class: Ⅲ), Salt Region drop-out fuse [RW11-12 / 100A, RW3-12 / 100A], use the high drop-out fuse pole single phase operation insulated, not allowed to bring the load operation. Through practice found that in the first phase opened with a load error, in most cases with loop disconnect or almost parallel circuit, low voltage disconnect, it will not happen intense arc. While in the second phase opened with a load, because the fracture voltage of the line voltage, the higher the fracture voltage, strong arc can occur that may lead to the occurrence of adjacent arc phase short circuit, would threaten the safety of personnel and equipment. And in the third phase opened, because the circuit has become an open (non-current or current is very small), without arcing.