Leakage protector in the reaction of electric shock and leakage protection with high sensitivity and fast action,
Electromagnetic leakage protection structure and principle
This is other protection of electrical appliances, such as fuses, automatic switches and so on. Automatic switching and fuses are normal when the load current through their operating protection value to avoid the normal load current to set, so their main role is to cut off the system phase short circuit fault (some automatic switch also has overload protection ). The leakage current protection device is the use of the system's residual current response and action, the normal operation of the system when the residual current is almost zero, so its action set value can be set very small (usually mA level), when the system of personal electric shock or equipment When the shell is charged, there is a large residual current, leakage protection device by detecting and processing the residual current and reliable action, cut off the power.
Electrical equipment leakage, will show abnormal current or voltage signal, leakage protection by detecting, handling the abnormal current or voltage signal, to promote the action of the implementing agencies. We operate according to the fault current leakage protection device called current leakage protection device, according to the fault voltage action leakage protection device called voltage type leakage protector. As the voltage leakage protector structure is complex, by the external interference characteristics of poor stability, high manufacturing costs, has been basically eliminated. Domestic and foreign leakage protection of the research and application are current-type leakage protection as the leading position.