Vacuum load disconnector-fuse combination for wind power and its switchgear

Abstract

The invention discloses a vacuum load isolation switch-fuse combined electric appliance for wind power. The electric appliance comprises an isolation switch, a fuse, an operation mechanism and a wall-penetrating type embedded pole, wherein the isolation switch and the fuse are respectively and fixedly arranged at the two sides of a metal bottom frame, the wall-penetrating type embedded pole penetrates through the metal bottom frame, one end of the wall-penetrating type embedded pole is electrically connected with a soft connection and is fixedly connected with a guide rod, the other end of the wall-penetrating type embedded pole is fixedly provided with a static contact head, a vacuum arc extinguishing chamber and a conductive body are embedded in the wall-penetrating type embedded pole by epoxy resin material, and the conductive body is connected with the vacuum arc extinguishing chamber. The electric appliance has the advantage that a maintenance person is ensured to safely replace the fuse under the condition of live 35KV leading-in cables, and is more suitable for adverse environments and plateau areas.

Description

technical field [0001] The invention relates to electrical switch technology, in particular to a vacuum load isolating switch-fuse combination electrical appliance and a switchgear used in a 35KV wind power generation output network. Background technique [0002] The wind power generator converts the wind energy into AC power (voltage 690V) through the rotating blades and the generator, and then sends it into the power system through the step-up transformer and 35KV switchgear in the 35KV box transformer. Generally, according to the principle of one machine, one transformer, each The fan is equipped with a 35KV box transformer, and each box transformer needs to be equipped with a 35KV switchgear. From an economic point of view, the main components in each switchgear generally adopt a vacuum load disconnector-fuse combination that integrates a load disconnector and a fuse. [0003] Chinese patent CN101540480B discloses a combination of vacuum load switch and fuse. The featur...

AI Technical Summary

Problems solved by technology

Due to the large mass of the isolating switch switch, the operating force of the operating mechanism is required to be large, and the impact during the operation is relatively large, which affects the operating life of the switch mechanism. At the same time, the closing current parameters of the load switch are not easy to increase.

Images