drop-out fuse cutout

Product Description

Application: Drop-out fuse cutout is of outdoor used high voltage protective device. To be connected with incoming feeder of distribution transformers or distribution lines, it mainly protects transformer or lines from short circuit and overload, and on/off loading current. Keystone: The structure of drop-out fuse cutout is made up of insulated support and fuse tube. The static contact is installed the two end of insulated support, the moving contact is installed the two end of the fuse tube. The drop-out fuse cutout should be connected with circuit in series. When operating in normal working situation, the fuse tube is located at close sluice gate under the pressure of static contact. It is when the drop-out fuse cutout is under the condition of fuse pulled tightly, and the top and the bottom joint of the fuse locked firmly. When system is in trouble, the trouble current make the fuse breaking quickly and become electric arc, then inside quench tube in the effected of scorching hot electric arc, decompose a lot of gas, and form a very high pressure in the tube, then become a strong wind along the pipeline, pull the electric arc longer rapidly and put out by the effect of strong dissociate hydronium ion. After the fuse breaking, the top and bottom moving contacts come down because of losing the pulling strength. The tight part is released. And the fuse tube, in the force of the contact and its own weight, forms an obvious separate gap. Condition of Use: 1. The ambient air temperatures within the range of **0&#***1;to **0&#***1;; 2. The altitude above sea level not exceeding 1,**0m; (If the altitude is higher than 1,**0, it needs adjust.) 3. Frequency of the xxxxx power supply not less than *8Hz and not exceeding *2Hz; 4. Earthquake intensity not exceeding 7 degrees; 5. Maximum wind speed not exceeding *5m/s. Technical Standard: The technical performance of the products is in confirmed to IEC**1, **2.