Heating device and method of gas insulated circuit breaker

Abstract

According to the heating device and method of the gas insulation circuit breaker, when an infrared heater is arranged at a proper position in a circuit breaker post insulator to work, infrared rays emitted by the infrared heater have directivity and are emitted from the bottom of the circuit breaker post insulator to the top end of the post insulator, and in the process, SF6 absorbs a part of the infrared rays, so that the infrared rays can be heated to a certain degree. The inner wall of the post insulator and the outer wall of the circuit breaker insulating pull rod can absorb infrared rays irradiated on the surfaces of the post insulator and the circuit breaker insulating pull rod, and the temperature of the inner wall of the post insulator and the outer wall of the circuit breaker insulating pull rod rises. When the infrared rays irradiate the arc extinguish chamber of the circuit breaker, the infrared rays can be absorbed, and the temperature rises. The infrared heater is controlled by a controller to work, and the controller supplies power through an alternating-current or direct-current power source at the ground potential and receives manual operation and signals of the temperature sensor, so that the heating system works to form a closed loop. The temperature monitoring sensor measures the temperature and forms a closed loop with a controller of the infrared heater, so that the whole system reaches the required temperature.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers, in particular to a heating device and method for a gas-insulated circuit breaker. Background technique [0002] use SF 6 High voltage circuit breaker as insulating gas, in SF 6 When the inflation pressure is constant, as the temperature decreases, liquefaction will occur. when SF 6 When the liquefaction is serious, the insulation performance of the product will be reduced, and the product will be locked and alarmed. At present, the tank circuit breaker is provided with a heating jacket on the tank body for heating, and the heating device directly obtains energy on the spot, which is relatively easy to achieve. However, for the column type circuit breaker, when the heating device is installed at the lower end of the product column, because the column insulator of the circuit breaker is relatively high and the arc extinguishing chamber is far from the heat source, the heat transfer fro...

AI Technical Summary

Problems solved by technology

However, there are problems of low heat transfer efficiency and poor temperature rise ability

[0005] 3) An energy-taking coil is installed at the high-voltage end of the circuit breaker, and the energy of the coil is transferred to the heating sheet, which then transfers the heat to the sealing flange of the arc extinguishing chamber, static contact parts, insulating gas, etc.; the disadvantage is the heat transfer method Mainly based on heat transfer, weak convection, low transfer efficiency, unable to transfer heat energy over long distances, and when the circuit breaker is open, it cannot take energy and cannot be heated

[0006] In summary, the heat transfer methods in the prior art have the problems of narrow application range, inability to transfer heat energy over long distances, and low heat transfer efficiency

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