Circuit structure with protection function

Abstract

A circuit structure with a protection function comprises a power line (1) and is characterized in that a temperature current protector (100) is directly connected in series on the power line, comprises a bimetallic strip (40) and thermistors (50) connected in parallel at the two ends of the bimetallic strip (40), and is connected in series on a firing line of the power line. The circuit structure has the over-temperature over-current protection function, can prevent the bimetallic strip from automatically restoring after over-heat tipping off open circuit, from being capable of restoring only after socket power is cut off, and a power supply is switched on after temperature dropping, and is improved in safety. Moreover, the circuit is more sensitive on over-current protection. Further, the circuit structure is especially suitable for a circuit used for being connected with the temperature current protector (100) or the condition that rated current in a circuit branch is smaller than or equal to 9A, and can play a role of reliable protection.

Description

technical field [0001] The invention relates to a circuit structure, in particular to a circuit structure with protection function. Background technique [0002] In the traditional circuit structure, the fuse plays a protective role, but after the fuse is blown, it must be replaced before it can be restarted, which is troublesome to use; there are no other temperature protection and current protection functions on the power line itself. When overheating, or when the current is too large, such a power line cannot automatically disconnect the power supply, and cannot provide protection. The wear or damage of various household appliances and factory equipment during use will lead to excessive circuit load, wire wear, damage to household appliances and a series of faults in factory equipment will easily cause circuit heating or excessive current, which may even burn out electrical equipment. cause electrical fire. Contents of the invention [0003] The technical problem to b...

AI Technical Summary

Problems solved by technology

[0002] In the traditional circuit structure, the fuse plays a protective role, but after the fuse is blown, it must be replaced before it can be restarted, which is troublesome to use; there are no other temperature protection and current protection functions on the power line itself. When overheating, or when the current is too large, such a power line cannot automatically disconnect the power supply, and cannot protect

The wear or damage of various household appliances and factory equipment during use will lead to excessive circuit load, wire wear, damage to household appliances and a series of faults in factory equipment will easily cause circuit heating or excessive current, which may even burn out electrical equipment. electrical fire

Images