Breaker electrical calibration quality determination method
A judging method and circuit breaker technology, which is applied in the direction of circuit breaker testing, measuring electrical variables, instruments, etc., can solve problems such as poor spot welding, unstable quality of circuit breakers, and large contact resistance, and achieve the effect of improving production capacity
Pending Publication Date: 2019-12-13
ZHEJIANG CHINT ELECTRIC CO LTD
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Problems solved by technology
These defects include: large contact resistance, poor spot welding, short circuit between coil and double gold, wrong spot welding of double gold, wrong coil installation, etc.
However, the conventional electric calibration station does not have the ability to pick out these products. The conventional calibration station will automatically adjust the current according to the resistance of the circuit breaker. Even if the current is too large, the calibration will not stop, resulting in unqualified products being regarded as qualified products. flow out
However, under the current technical conditions, the above-mentioned defects such as large contact resistance, wrong double gold spot welding, poor spot welding, wrong coil installation, and short circuit between coil and double gold cannot be completely eliminated due to the lack of clear indicators, resulting in the quality of the circuit breaker. unstable
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[0042] The following is attached Figures 1 to 9 The given examples further illustrate the specific implementation of the method for judging the quality of the electrical calibration of the circuit breaker created by the present invention. The method for judging the electrical calibration quality of a circuit breaker created by the present invention is not limited to the description of the following embodiments.
[0043] A circuit breaker usually includes a fixed contact and a moving contact arranged oppositely. The static contact is connected to one end of the circuit through a magnetic tripping mechanism and the first terminal, and the moving contact is connected to the circuit through a thermal tripping mechanism and the second terminal. At the other end, the moving contact is connected to the operating mechanism, and the operating mechanism is connected to the handle. Turning the handle can drive the operating mechanism to drive the moving contact to contact the static con...
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The invention discloses a breaker electrical calibration quality determination method. The method comprises the steps that S1, a time-minimal safe electrical property curve and a time-maximal safe electrical property curve of qualified breakers are obtained; S2, a time-electrical property curve of a to-be-detected breaker is obtained; and S3, the time-electrical property curve of the to-be-detected breaker is compared with the time-maximal safe electrical property curve and the time-minimal safe electrical property curve respectively. Through comparative analysis of the time-electrical property curve of the to-be-detected breaker and the time-electrical property curves of the qualified breakers, flaws of breaker products can be detected rapidly and accurately, and the situation that flawedbreakers are regarded as qualified products in the production process to flow out is prevented.
Description
technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a method for judging the quality of electrical calibration of a circuit breaker. Background technique [0002] At present, unqualified products such as circuit breakers and leakage circuit breakers are often found in production and return, such as burnt out, lack of phase and no power supply, etc. The reason is that defective circuit breakers are regarded as qualified products during the production process. These defects include: high contact resistance, poor spot welding, short circuit between coil and double gold, wrong spot welding of double gold, wrong coil installation, etc. However, the conventional electric calibration station does not have the ability to pick out these products. The conventional calibration station will automatically adjust the current according to the resistance of the circuit breaker. Even if the current is too large, the calibration wil...
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IPC IPC(8): G01R31/327
CPCG01R31/3277
Inventor 康宽罗涛彭勃
Owner ZHEJIANG CHINT ELECTRIC CO LTD