Thermal overload release adjusting device for molded case circuit breaker

Abstract

The invention discloses a thermal overload release adjusting device for a molded case circuit breaker. The device comprises a mounting assembly, a release stroke tester and a thermal overload releaseadjusting assembly; the mounting assembly comprises a mounting plate, fixing screws and positioning pieces; the thermal overload release adjusting assembly comprises a thermal overload release adjusting reference plate, reference plate springs and hand screws; the fixing screws penetrate through first mounting clamping grooves to mount and fix the positioning pieces on the mounting plate; the positioning pieces enable the thermal overload release adjusting device to be installed and positioned on a circuit breaker needing to be detected; the release stroke tester is installed at the second mounting clamping groove of the mounting plate through screws; and the thermal overload release adjusting reference plate and the reference plate springs are fixed at the mounting hole positions of the mounting plate through the hand screws. The thermal overload release adjusting device for the molded case circuit breaker has rich functions, is simple in structure and convenient to disassemble, repair and maintain; and the production and verification work of the circuit breaker can be simplified, so that the production and verification of the circuit breaker are quantified.

Description

technical field [0001] The invention relates to the field of detection tools, in particular to a thermal tripper adjustment device for a molded case circuit breaker. Background technique [0002] Molded case circuit breakers are usually used in power distribution equipment such as factories and buildings. Under normal circumstances, they can be used for frequent switching of lines and infrequent starting of motors. At the same time, they can also provide overload, short circuit, and undervoltage protection. With rich internal accessories, it can also realize a series of functions such as remote opening, alarm, auxiliary contact output and so on. [0003] The performance of a molded case circuit breaker is related to many factors, such as overtravel, opening distance, final pressure, tripping force, etc. Generally, manufacturers will test the above parameters, but often ignore the detection of the tripping stroke of the circuit breaker. [0004] The tripping stroke of the ci...

AI Technical Summary

Problems solved by technology

The re-buckle amount of the circuit breaker has a great influence on the performance of the circuit breaker. If the re-buckle amount is too small, the circuit breaker will slip; if the re-buckle amount is too large, the circuit breaker will not be able to open.

At the same time, there is a relationship between the tripping force of a circuit breaker and the retripping amount. A circuit breaker with a small retripping amount often has a small tripping force, while a circuit breaker with a large retripping amount may have a correspondingly larger tripping force. Among them, if one of the parameters is uncertain, it is difficult to accurately determine which party caused the problem, which leads to failure to fundamentally solve the corresponding technical problems

[0005] An effective re-deduction amount will be determined in the design stage of the circuit breaker, but due to differences in parts and assembly process levels, there will often be large differences in the re-deduction amount for the same batch of products

[0006] The different rebuckle amount of the circuit breaker will not only cause the phenomenon of slipping and locking of the circuit breaker, but also affect the production efficiency of the product. For example, due to the different rebuckle amount of the same batch of products, no one will Unified operation standards require continuous trial and low production efficiency; when leaving the factory, the circuit breaker is equipped with internal accessories (especially shunt excitation / undervoltage), and the circuit breaker needs to be adjusted before it can be used due to the different buckling amount of the circuit breaker; If the customer needs to install the internal accessories by himself, the customer will not adjust the relevant accessories correctly due to the different deduction of the circuit breaker. In severe cases, the accessories will fail, which will pose hidden dangers to the safety of production equipment and users

[0007] In production, the re-clamping amount of the circuit breaker is determined by parts such as re-clamping and locking, but the re-clamping amount itself is small, and after assembly, the space between parts is compact, and it is difficult to measure accurately with a physical ruler, so it is urgent to develop Use the device to control the tripping amount of the circuit breaker (indirectly control the tripping amount of the circuit breaker), so that it is within a reasonable range

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