Temperature acquisition device and acquisition method of circuit breaker

Abstract

The invention relates to a temperature acquisition device of a circuit breaker. The temperature acquisition device includes a timer module 100, an analog-digital sampling driving module 101, a sampling value filtering module 102, a temperature absolute value calculating module 103 and a temperature protection function module 104. The invention also relates to a temperature acquisition method of a circuit breaker. The timer module 100 triggers the sampling channel of the analog-digital sampling driving module 101 to finish temperature sampling and obtain N sampling values A; the sampling value filtering module 102 filters the N sampling values A and then calculates a filtering sampling value B; the temperature absolute value calculating module 103 can calculate sampling temperature TA according to the filtering sampling value B; and the temperature protection function module 104 is used for judging the sampling temperature TA and outputting alarm signals. The temperature acquisition device and acquisition method of the circuit breaker of the invention have the advantages of accurate measurement, simple operation and high practicability.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a temperature acquisition device and acquisition method of a circuit breaker. Background technique [0002] The basic protection of low-voltage electrical appliances such as frame circuit breakers and molded case circuit breakers is actually the protection of the temperature of the circuit breaker. Since the busbar of the circuit breaker has its own inherent resistance, as the current increases, the thermal effect will cause the temperature of the busbar to rise sharply. At the same time, when there is current passing through the busbar of the circuit breaker and the circuit breaker is in the opening, closing or tripping state, the contact resistance between the contacts of the circuit breaker is relatively large, and the busbar will also generate a very high temperature. And when the temperature is higher than a certain value, it will cause damage to the busbar a...

AI Technical Summary

Problems solved by technology

[0003] The current temperature detection method only takes into account the temperature rise inside the electronic controller, and cannot really reflect the real temperature of the busbar when a large current flows

Moreover, the installation structure and detection method of the existing temperature detection device are complicated, and it is not easy to install, thereby reducing the efficiency of the side.

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