A circuit breaker reclosing device

Abstract

The invention discloses a recloser of a circuit breaker. The recloser comprises a shell, a forward and reverse rotation motor, a spindle and a driving handle, wherein the forward and reverse rotation motor is arranged in the shell, and the driving handle is used for driving a handle of the circuit breaker in linkage. A transmission blade and a transmission part are rotatably arranged on the spindle, the forward and reverse rotation motor is matched with the transmission blade in a driving and connecting manner, a transmission gear taking the spindle as a rotation center is arranged on the transmission part, a handle gear in mesh transmission with the transmission gear is arranged on the driving handle, an arc groove is formed in the outer surface of the transmission blade corresponding to the transmission part, the center of the arc groove is positioned on the center line of the spindle, an opening is formed in the anticlockwise edge end of the arc groove in the transmission blade, a linkage shaft is rotatably arranged on the transmission part in a combined manner, and the transmission blade and the transmission part are matched structures which are linked anticlockwise and mutually free clockwise. The recloser has the advantages that the handle of the circuit breaker can be reclosed, response time of normal tripping of the circuit breaker cannot be affected and the like.

Description

technical field [0001] The invention relates to a matching part of a circuit breaker, in particular to a reclosing device of a circuit breaker. Background technique [0002] With the development of my country's smart grid, under the premise of requiring the grid to operate safely, it is urgent to control electrical appliances intelligently. For example, the combined use of prepaid energy meters and prepaid miniature circuit breakers (such as MM7S and MM10S series products produced by Zhejiang Mikeli Electric Co., Ltd.) can allow electricity users to automatically cut off the power supply when the prepaid electricity fee is exhausted. This greatly facilitates the distribution and control of electric energy by the power supply unit. However, after the user renews the fee, the user's circuit breaker cannot be automatically closed in time, and the user or the power supply staff need to manually operate, which brings inconvenience to the user and cannot meet the needs of the int...

AI Technical Summary

Problems solved by technology

Although this structure realizes the function of automatic closing, it has the following defects: when the user renews the fee, the threaded sleeve slides, drives the shift fork and the handle to perform the closing action, and the handle of the control mechanism then drives the handle of the circuit breaker clockwise. Rotate to close, but for the prepaid circuit device, when the user owes the fee or the circuit fails, it will automatically trip, and the handle of the circuit breaker will reset counterclockwise, but the electric operating mechanism of the above-mentioned reference document (101707169A) The control handle is always limited behind the handle of the circuit breaker, causing the handle of the circuit breaker to fail to turn and trip

[0006] (1) The first transmission piece and the second transmission piece are in surface contact and slidingly fit with each other. When the dimensions of the first transmission piece and the second transmission piece are thermally expanded and contracted or there is an error in the machining accuracy, the two The frictional resistance of the surface contact between the two is relatively large. When the circuit breaker trips, the sliding frictional resistance between the first transmission plate and the second transmission plate will affect the reaction time of the circuit breaker’s tripping, and there is a potential failure;

[0007] (2) When the automatic closing device of this structure is used in conjunction with the circuit breaker, it is often necessary to carry out on-site maintenance of the energized line. The automatic closing device re-closes and drives the circuit breaker to close, which will lead to power on the maintenance line, which will cause great hidden dangers to the life safety of maintenance workers

[0008] (3) The automatic closing device lacks the function of opening and closing the neutral pole circuit breaker. Therefore, when it is applied to the power grid, it is necessary to configure an additional opening and closing neutral pole circuit breaker, resulting in an increase in the number of circuit breakers, which is not conducive to Reduced size

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