Motor-operated small-size circuit breaker with trip protection function

Abstract

The invention relates to a motor-operated small-size circuit breaker with a trip protection function. The motor-operated small-size circuit breaker comprises at least one level of small-size circuit breaker (A) and a motor-operated device (B), wherein the small-size circuit breaker (A) and the motor-operated device (B) are connected by employing side-surface splicing, the motor-operated device (B) controls the small-size circuit breaker (A) to do breaking-closing operation, the motor-operated small-size circuit breaker is characterized in that a trip linkage piece (7) is arranged on the motor-operated device (B) and can be linked with a trip rod (8) in the small-size circuit breaker (A) so that the trip rod (8) can trip. By the motor-operated small-size circuit breaker, the reliability and the stability of a product are improved, the appearance sizes of a motor-operated device module and a small-size circuit breaker module are completely consistent, the product volume is reduced, and a user is more rapid and convenient to install and use; and meanwhile, the small-size circuit breaker is directly driven to be rapidly trip from the interior by the motor-operated device, the purposes of the small-size circuit breaker is directly locked in a trip state by the motor-operated device and closing operation cannot be performed by an external handle under the special states of user arrearage and a rear-end circuit fault are achieved.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an electrically operated small circuit breaker with a trip protection function, which improves the reliability of the circuit breaker in use. Background technique [0002] The opening and closing actions of traditional miniature circuit breakers require manual operations. With the development of smart grid, there is an urgent need for small circuit breaker products that can reliably realize automatic opening and closing. Therefore, small circuit breakers assembled with electric operating devices have appeared on the market. By sending instructions to the electric operating device, the small circuit breaker can be driven to open and close automatically without manual operation, which effectively saves manpower and material resources. Applications are increasingly widespread. However, for such products that are common in the existing market, ...

AI Technical Summary

Problems solved by technology

However, for such products that are common in the existing market, the electric operating device is used as an assembly accessory, and most of its dimensions are not completely consistent with the miniature circuit breaker, which causes inconvenience in product installation and use, and affects the overall appearance of the product.

In addition, some of the common electric operating devices in the existing market use a centrifugal clutch mechanism, some use a screw nut transmission mechanism, and some use a reversing shift fork clutch mechanism, etc., all of which are relatively complicated in structure, resulting in a large volume. , many parts, complex manufacturing and assembly process, and high cost, which is not conducive to large-scale promotion and use

At the same time, when the existing traditional electric-operated miniature circuit breaker locks the operating handle intentionally, or the operating handle fails and is stuck, the electric operating device cannot drive the miniature circuit breaker to open; If the switch is not allowed to close due to user arrears, back-end circuit failure, etc., such as artificially forced manual switch, causing potential safety hazards, and the problem of stealing electricity in the state of arrears

Images