A solid insulated circuit breaker

Abstract

The invention discloses a solid-insulated circuit breaker applied to high-voltage switch cabinets. The solid-insulated circuit breaker comprises a circuit breaking device and a wiring device. The circuit breaking device is arranged inside a high-voltage switch cabinet, and is used for being connected with an isolating switch in the high-voltage switch cabinet. The circuit breaking device includes an insulated shell, an insulated pull rod, a first contact base, a vacuum arcing chamber, and a second contact base. A first end of the wiring device is connected with the circuit breaking device, a second end of the wiring device is provided with at least one inner cone structure, and the outer surface of the wiring device is provided with an insulating layer. The solid-insulated circuit breaker provided by the embodiment of the invention has better insulation performance when working in a 35kV power system. The solid-insulated circuit breaker has a simple structure, so that the size of the high-voltage switch cabinet is reduced. All parts of the solid-insulated circuit breaker are modular, which makes products more flexible and facilitates installation and maintenance.

Description

technical field [0001] The invention relates to the field of high-voltage switches, in particular to a solid insulation circuit breaker. Background technique [0002] The insulation medium of the switchgear of the 35,000 volt power system has experienced air insulation, mixed insulation of air and sulfur hexafluoride gas, and full insulation of sulfur hexafluoride gas. [0003] The insulating circuit breaker used in the insulating switchgear is a part of the switchgear of the 35,000 volt power system. stage. The insulating circuit breaker with sulfur hexafluoride gas as the insulating medium is used. Since the gas sulfur hexafluoride is toxic after arc extinguishing, it has a greenhouse effect and is easy to leak. The metal box is bulky and requires high sealing performance. The processing technology is complicated, which leads to high cost of the box body, complicated maintenance and detection, and insufficient protection level; moreover, because the charged body is expos...

AI Technical Summary

Problems solved by technology

The insulating circuit breaker with sulfur hexafluoride gas as the insulating medium is used. Since the gas sulfur hexafluoride is toxic after arc extinguishing, it has a greenhouse effect and is easy to leak. The metal box is bulky and requires high sealing performance. The processing technology is complicated, which leads to high cost of the box body, complicated maintenance and detection, and insufficient protection level; moreover, because the charged body is exposed, it will be eroded by air and dust, which will easily cause corrosion of the charged body, reduce the insulation level, and easily Causing personal casualties, so the gas insulated switchgear has begun to slowly withdraw from the stage of history, replaced by solid insulated switchgear

[0004] The insulation circuit breaker in the existing solid insulation switchgear adopts solid insulation, but the structure of the insulation circuit breaker is complicated, which causes the electric field in the solid insulation switchgear to be extremely uneven and the insulation effect is not good, and the size of the cabinet is large

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