A method and system for selecting a protection device

Abstract

A method and system for selecting protective device is disclosed. By determining the safety standards and circuit parameters of the protected circuit, the circuit parameters of the overcurrent protection device are determined according to the safety standards and circuit parameters of the protected circuit, and the type of the overcurrent protection device required by the protected circuit is determined according to the circuit parameters of the overcurrent protection device by querying the preset device specification table. According to the safety standard of the protected circuit and the circuit parameters as the reference parameters of the overcurrent protection device, It avoids the deviation of the selection parameters caused by the difference of different safety standards, which leads to the problem that the overcurrent protection device can not play a good role in protecting the protected circuit, and the stability of the overcurrent protection device is reduced. Moreover, by automatically calculating the circuit parameters of the overcurrent protection device, the automatic selection of the overcurrent protection device is realized, and the human cost in the parameter calculation process is saved.

Description

technical field [0001] The invention relates to the field of control, in particular to a method and system for selecting a protection device. Background technique [0002] At present, when selecting an overcurrent protection device, usually only the working voltage and current of the device are considered. Specifically, according to the rated voltage or rated current of the protected circuit, the corresponding parameters of the overcurrent protection device are calculated according to a certain reduction factor , refer to the operating voltage and operating current of the over-current protection device, and select the appropriate over-current protection device. [0003] In the prior art, only the influence of voltage and current is considered and other parameters in the circuit are ignored, which makes the protected circuit easily affected by other parameters and reduces the stability of the protected circuit. Contents of the invention [0004] In view of this, the presen...

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Problems solved by technology

[0004] In view of this, the present invention provides a protection device selection method and system to solve the problem in the prior art that only considers the influence of voltage and current while ignoring other parameters in the circuit, which reduces the stability of the protected circuit. The scheme is as follows:

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