Novel power distribution network disconnecting knife switch

Abstract

The invention provides a novel power distribution network disconnecting knife switch. The novel power distribution network disconnecting knife switch comprises a base, an insulator, a static contact,a movable contact, a knife switch and an operating ring; limiting devices are arranged on the left side and the right side of the lower portion of the operating ring; the limiting device comprises a horizontal limiting plate and at least one U-shaped groove formed in the horizontal limiting plate; and a reflective coating layer is arranged below the horizontal limiting plate. The static contact comprises a main pile head and auxiliary pile heads arranged on the two sides of the main pile head. A copper braided belt is arranged at the rotating shaft of the movable contact. The novel power distribution network disconnecting switch has the advantages that the operation loop is easier to operate, the heating probability is smaller, and the problem of heating caused by the increase of the corrosion resistance of the knife brake is overcome.

Description

technical field [0001] The invention relates to a novel distribution network isolation switch. Background technique [0002] The distribution network isolation switch is one of the commonly used power equipment in the distribution network. Its main feature is that it has no arc extinguishing ability, and can only open and close the circuit when there is no load current. Its main function is: after opening, establish a reliable insulation gap, and isolate the equipment or lines that need to be repaired from the power supply with an obvious disconnection point to ensure the safety of maintenance personnel and equipment; ;Small current in the split line, such as bushing, busbar, short cable, no-load transformer with a certain capacity and other equipment. [0003] At present, the use of isolation switch in the distribution network is very common. However, the existing knife switch has the following common defects: First, the contact area at the dynamic and static contacts of ...

AI Technical Summary

Problems solved by technology

However, the existing knife switches have the following common defects: First, the contact area at the static and dynamic contacts of the isolated knife switch is too small, which can easily cause heat and then cause failures, resulting in circuit tripping

The second is that the operating ring of the isolation knife switch is too small, and the operating rod should not be placed in the operating ring when operating under the rod, which greatly reduces the operating efficiency

There are even operators who directly use the operating rod to push the edge of the isolation knife to operate, which can easily cause the isolation knife to be wrong, resulting in poor contact and failure caused by heat.

The third is the wear and tear caused by multiple opening and closing of the rotating shaft of the isolation knife, the corrosion caused by long-term operation, etc., resulting in poor contact and excessive contact resistance, which will cause the equipment to heat up and burn out in severe cases

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