What is the operating sequence of drop-out fuses?
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What is the operating sequence when opening and closing a drop-out fuse? The order in windy conditions?
Whether there is wind or not, one first connects with the sides, and then with the center. If there’s wind, it’s first in the direction against the wind.
Reply to 2# czywqa: Isn’t turning off the fuse the exact opposite of that?
Reply to 3# wan2007416: It’s like this. My bad for not making myself clear.
This post was last edited by muchanglin on 2011-12-31 at 13:20. Power-off procedure: When disconnecting, the middle phase should be disconnected first, followed by the two side phases. The operation must be carried out decisively and swiftly, with appropriate force applied, to prevent damage to the porcelain insulator caused by impact forces. A. Operating sequence: First, open the middle phase, then open the side phases. (This is mainly because when operating the second drop-out fuse, the current is relatively high; at this time, the middle phase has already been opened, and the other two drop-out fuses are located at a considerable distance from each other. This helps prevent interphase arc short circuits caused by the elongation of the arc.) ) When pulling the first phase, a smaller arc is generated; when pulling the second phase, a larger arc is generated. B. When there is wind, first close the windward side phase, then close the leeward side phase to prevent arc short-circuiting. Power-on procedure: When closing the circuit, first close the two side phases, then the middle phase. The operation should be performed decisively and swiftly, with appropriate force, to prevent impact forces from damaging the porcelain body. Information source: www
A. Operating sequence: Close the side phases first, then the middle phase.
B. After closing, it is necessary to verify that the operation results are normal and that there are no errors.
C. After power is supplied, continuous monitoring should be conducted to ensure normal operation.
A. Operating sequence: Close the side phases first, then the middle phase.
B. After closing, it is necessary to verify that the operation results are normal and that there are no errors.
C. After power is supplied, continuous monitoring should be conducted to ensure normal operation.
I also have another question I’d like to ask! Are drop-out fuses still popular nowadays? Is it outdated? Are there any substitutes now? It would be great if there’s a photo included. Thanks! !