Sulfur hexafluoride circuit breaker

Abstract

A new type of sulfur hexafluoride circuit breaker, including a base, three circuit breaker phase columns are arranged on the base, and an arc extinguishing chamber is arranged in the circuit breaker phase column, and the arc extinguishing chamber is filled with sulfur hexafluoride gas to extinguish The arc chamber is connected through a conduit, a transmission mechanism is provided in the base, a control box is provided under the base, a spring operating mechanism and a control device are installed in the control box, a density relay is provided on the conduit, and a control box is also installed on the conduit. There is a first three-way connector, and a gas circulator is also included. The gas circulator is connected to the first three-way connector. A temperature sensor is provided in the gas circulator, and a temperature control device is provided at the bottom of the gas circulator; The invention provides a novel sulfur hexafluoride circuit breaker, which can control the temperature of sulfur hexafluoride, supplement the loss of sulfur hexafluoride gas at the same time, and realize automatic control, and is suitable for smart grids.

Description

technical field [0001] The invention relates to high-voltage electrical equipment, in particular to a novel sulfur hexafluoride circuit breaker. Background technique [0002] Sulfur hexafluoride has excellent insulation and arc extinguishing properties, so it is widely used in high-voltage circuit breakers, but sulfur hexafluoride gas will liquefy at low temperatures, resulting in reduced insulation and arc extinguishing capabilities of sulfur hexafluoride gas When the pressure of sulfur fluoride is reduced to the blocking pressure of the circuit breaker, the circuit breaker has to be out of operation, and in severe cases, it will cause a large-scale power outage. Therefore, the commonly used sulfur hexafluoride circuit breakers will be equipped with heating devices to prevent the liquefaction of sulfur hexafluoride gas, but the existing sulfur hexafluoride circuit breakers have the following deficiencies: [0003] 1. Under the influence of high temperature, sulfur hexafluo...

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Problems solved by technology

[0002] Sulfur hexafluoride has excellent insulation and arc extinguishing properties, so it is widely used in high-voltage circuit breakers, but sulfur hexafluoride gas will liquefy at low temperatures, resulting in reduced insulation and arc extinguishing capabilities of sulfur hexafluoride gas When the pressure of sulfur fluoride is reduced to the blocking pressure of the circuit breaker, the circuit breaker has to be out of operation, and in severe cases, it will cause large-scale power outages

[0003] 1. Under the influence of high temperature, sulfur hexafluoride gas will decompose, and its decomposition products will become corrosive electrolytes when they meet water, especially some highly toxic decomposition products, such as SF4, S2 F2, SOF2, HF, SO2 Etc. If a large amount of inhalation is inhaled into the human body, it will cause dizziness, pulmonary edema, even coma, death, and cause harm to maintenance personnel.

[0004] 2. The existing heating devices of sulfur hexafluoride circuit breakers mostly adopt mechanical structures, which have low intelligence and cannot adapt to the construction of the current smart grid

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