Intro：The main technical parameters accord with I EC61009 -1 standard parameters 1. Line protection function: overload protection and short circuit protection 2. Residual current protection function: it can be turned on or off when the residual current protection function is on, the residual current is exceeded when the current action setting value is within the specified delay time execute residual current protection action; 3. Measurement function: main circuit current, residual current measurement internal temperature measurement function; (Scalable voltage measurement function) 4. Circuit breaker status detection function: circuit breaker closing and opening detection, overload or short-circuit tripping detection, residual current action tripping buckle detection; 5. Residual current test function: with test button, press when the test button is pressed, the residual current of the circuit breaker can be verified function of protection action; 6. LED indication function: LED indicates th
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