High-voltage three-pole AC vacuum contactor

Abstract

The invention relates to a high-voltage three-pole AC vacuum contactor which can be frequently operated by closing and separating and is suitable for a power supply and a distribution system with a rated voltage of 24KV. The high-voltage three-pole AC vacuum contactor adopts the technical scheme that a static guide rod and an electrokinetic guide rod are arranged in a vacuum arc extinguish chamber; the upper end of the static guide rod is connected with a fixed conducting bar fixed on the upper part of an insulation frame; a moving contact welded at the upper end of the electrokinetic guide rod is vertically opposite to a fixed contact welded at the lower end of the static guide rod, and the two contacts can be contacted and separated; the lower end of the electrokinetic guide rod extends out of the vacuum arc extinguish chamber and is connected with a moving conducting bar; and the extending end of the electrokinetic guide rod is connected with an insulator. The high-voltage three-pole AC vacuum contactor is characterized in that the lower end of the insulator is connected with a moving iron plate; the moving iron plate is connected with one end of a tripping spring, while the other end of the tripping spring is connected with a fixed iron plate; the fixed iron plate is fixed on the insulation frame, and the lower part of the fixed iron plate is connected with a fixed iron core; the upper part of the moving iron plate is connected with a moving iron core, and the moving iron core and the fixed iron core are vertically opposite to each other and a certain distance is reserved between the moving iron core and the fixed iron core; and a coil is sleeved outside the moving iron core and the fixed iron core. The invention has the advantages of skillful structure, reliable working, high response speed and wide application range.

Description

technical field [0001] The invention relates to a high-voltage three-pole AC vacuum contactor, in particular to a high-voltage three-pole AC vacuum contactor which is suitable for use in a power supply and distribution system with a rated voltage of 24KV and can be operated frequently. Background technique [0002] With the rapid development of my country's national economy and power industry, the original voltage of 10kV power supply network will be gradually upgraded to 24kV power supply to meet the vacuum of electrical equipment such as motors, transformers, and capacitors in the 24kV power supply and distribution system. At present, there is no manufacturer of contactors in China, and the country is still blank. Therefore, it is urgent to develop a high-voltage three-pole AC vacuum contactor with a rated voltage of 24kV to meet the needs of users. Contents of the invention [0003] The purpose of the present invention is to provide a high-voltage three-pole AC vacuum co...

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Problems solved by technology

[0002] With the rapid development of my country's national economy and power industry, the original voltage of 10kV power supply network will be gradually upgraded to 24kV power supply to meet the vacuum of electrical equipment such as motors, transformers, and capacitors in the 24kV power supply and distribution system. At present, there is no domestic manufacturer of contactors, and the country is still blank. Therefore, it is urgent to develop a high-voltage three-pole AC vacuum contactor with a rated voltage of 24kV to meet the needs of users.

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