Automatic three-phase-synchronization-fall-off fuse protector

Abstract

Disclosed is an automatic three-phase-synchronization-fall-off fuse protector which relates to electric-power devices and especially relates to an automatic three-phase-synchronization-fall-off fuse protector used for an outdoor transformer. The fuse protector includes three sets of rod-shaped composite insulators 1, clamping parts 2, upper static contact assemblies 3, upper dynamic contact assemblies 4, arc extinction tubes 5, fuse wires 6, lower dynamic contact assemblies 7, lower static contact assemblies 8, connecting-rod push rods 9, fall-off levers 10, connectors 11, and arc blocking covers 12, and a connecting rod 13, a push-up ring 14, and a link bar 15 with a corner gripper. The fuse protector is capable of realizing three-phase synchronization fall-off upon one-phase fusing and three-phase synchronization switch-on upon one push-up. The fuse protector enables upper and lower dynamic and static contacts to be stable in contact and reduces the contact stresses of the fuse wires and improves the use service life. The fuse protector device uses fuse wire boxes so that the overall structure is optimized and the integration level of the push-up three-phase automatic switch-on structure is improved; the structure is compact, the weight is reduced, the manufacturing is simplified, the cost is reduced and a satisfactory use effect is achieved. The automatic three-phase-synchronization-fall-off fuse protector is widely applicable to an outdoor transformer.

Description

technical field [0001] The invention relates to electric equipment, in particular to an automatic three-phase synchronous drop-out fuse for outdoor transformers. Background technique [0002] The existing fuses for outdoor transformers in China are single-phase operation, and the ring hole of the upper contact is hung with an insulating rod. When the swing is unstable, the ears of the lower contact are hung into the lower support, so that the three phases are separated. The operation is completed separately, which is difficult, time-consuming, laborious and unsafe. [0003] It is unrealistic to use high-tech and high-cost technical means or equipment for large-volume and wide-area outdoor transformer fuses. [0004] The patent No. 200620098873.1 "Three-phase linkage drop-out fuse" invented by the applicant and the second-generation product patent number 200720083838.7 "Three-phase linkage drop-out fuse" invented the plug-in fuse that can be closed simultaneously in three-ph...

AI Technical Summary

Problems solved by technology

[0005] After 8 years of painstaking research and 4 revisions, the currently used 201110342804.6 "A Semi-Automatic Three-phase Synchronous Drop-out Fuse", which realizes the functions of one-phase fusing, three-phase synchronous drop, one-time push-up, and three-phase synchronous closing It is very successful, but the overall structure is still not optimized enough. In order to further simplify and optimize the overall structure, make the contact between the upper and lower dynamic and static contacts more stable, and the action of pushing up and closing the switch is easier, faster and more stable. The applicant has made major modifications , made "An Automatic Three-phase Synchronous Dropout Fuse"

[0006] According to the search, there is no patent application identical to the present invention in China

Images