Outdoor drop type fuses are suitable for 35kV and below voltage and frequency 50Hz power systems, used for overload and short circuit protection of transmission lines and power transformers, and for breaking and closing rated load current.
The drop type fuse consists of an insulation bracket and a fuse tube, with static contacts installed at both ends of the insulation bracket and dynamic contacts installed at both ends of the fuse tube. The fuse tube consists of an inner arc extinguishing tube and an outer phenolic paper tube or epoxy glass cloth tube.
Selection
Operating conditions
1. Suitable for environments with an upper limit of 40 ℃ and a lower limit of -30 ℃.
2. Altitude not exceeding 1000m, wind speed not exceeding 35m/s
3. Fuses are not suitable for the following locations
3.1 Places with fuel or explosion hazards.
3.2 Places with severe vibration or impact.
3.3 Areas with abnormal electrochemical gas effects and severe air pollution and smoke