Hand cart for sulphur hexafluoride circuit breaker

Abstract

The invention discloses a sulfur hexafluoride circuit breaker handcart which comprises a handcart frame and a circuit breaker body installed on the handcart frame. A rotary connecting piece is installed on a mechanism case of the circuit breaker, one end of the connecting piece is connected with a rotating rod installed on a feed screw nut through a pulling part, and the other end of the connecting piece is connected with a break-brake half axle of the circuit breaker; a valve support is installed on the fixing frame, a valve which can vertically slide is installed on the valve support, the valve is connected with a small end of a connecting lever through a long hole arranged on the valve, the big end of the connecting lever is fixedly connected on a square bar arranged with a screw rod in parallel, and the rotating rod capable of sliding is sleeved on the square bar. The invention is used by being matched with the sulfur hexafluoride circuit breaker, a control and protection device is additionally arranged for the switch cabinet, and the handcart is linked with the circuit breaker though the connecting piece, therefore, the enforced mechanical interlocking is realized, and the requirements of the five-protection functions are met.

Description

technical field [0001] The invention relates to a circuit breaker device, in particular to a sulfur hexafluoride circuit breaker handcart. Background technique [0002] With the gradual elimination of oil-less circuit breakers, the circuit breakers currently operating in the national grid for switching and distributing electric energy mainly include vacuum circuit breakers and sulfur hexafluoride circuit breakers. In the 10KV power grid, vacuum circuit breakers rely on their superiority. The price / performance ratio occupies a dominant position, and various styles of circuit breaker handcarts have also emerged; in the 35kV power grid, although vacuum circuit breakers are also used, various handcart circuit breakers that are flexible in operation and easy to maintain are also emerging in endlessly, but in use Among them, the sulfur hexafluoride circuit breaker has a better arc extinguishing effect. However, most of the current sulfur hexafluoride circuit breakers at home and a...

AI Technical Summary

Problems solved by technology

[0002] With the gradual elimination of oil-less circuit breakers, the circuit breakers currently operating in the national grid for switching and distributing electric energy mainly include vacuum circuit breakers and sulfur hexafluoride circuit breakers. In the 10KV power grid, vacuum circuit breakers rely on their superiority. The price / performance ratio occupies a dominant position, and various styles of circuit breaker handcarts have also emerged; in the 35kV power grid, although vacuum circuit breakers are also used, various handcart circuit breakers that are flexible in operation and easy to maintain are also emerging in endlessly, but in use Among them, the sulfur hexafluoride circuit breaker has a better arc extinguishing effect. However, most of the current sulfur hexafluoride circuit breakers at home and abroad are fixed. Since they cannot be moved, there is a lot of inconvenience in installation and maintenance, especially When a fault occurs, it cannot be replaced immediately, which will have a great impact on the stability of the grid operation. The use of switch cabinets with fixed circuit breakers is becoming less and less, and they are all switching to the switches with handcart-type movable circuit breakers. cabinet development

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