1. Electronic molded case circuit breaker rated limit short-circuit breaking capacity Icu: circuit breaker has two breaking capacity index values: rated limit short-circuit breaking capacity ICU and rated short-circuit breaking capacity in working integrated circuit chip. As a characteristic parameter, ICS is not only a simple consideration of the breaking capacity of the circuit breaker, but also a breaking index value, in other words, everything can work normally after several times of short circuit common faults are destroyed.

2. Overcurrent protection and breaking ability of electronic molded case circuit breaker: When the circuit breaker is short-circuited, the contact point will be quickly broken to cause electrical orphanage, which is equivalent to the rapid improvement of the electrical orphan resistor in the route, and then limit the increase of the amount of common fault current. The less time the circuit breaker is off, the closer the ICs are to the ICU, and the better the actual effect of overcurrent protection. It also significantly reduces the electromagnetic, electrical and thermoelectric effects caused by the amount of short-circuit current on circuit breakers and electrical equipment, and expands circuit breakers. Daily life.

3. Electronic molded case circuit breaker short-circuit maintenance: short-circuit maintenance indicates instantaneous short-circuit power trip. Attention should be paid to adjusting the maintenance preset value immediately after the load change, so as to avoid the preset value being too small and frequent power trips that endanger the quality of the switching power supply, or the preset value being too high to properly maintain the route and machinery and equipment.

4. Load delay time maintenance: Load delay time maintenance means that the load current exceeds the limit of the machinery and equipment, and there is a risk of igniting the machinery and equipment. The protection device is capable of disconnecting the switching power supply for a certain period of time. The load has a whole process of heat storage, and the maintenance posture does not need to be too fast. This safeguard is not effective against short-term overcurrent flows.

5. The protective function of the electronic molded case circuit breaker: the protective function is to stipulate that the leakage current after the circuit breaker is broken is not easy to cause damage to workers and machinery and equipment. After several short-circuit trips, the characteristics of the power switch are reduced and the leakage current is expanded. For the body, a leakage current of less than 30mA is a safe leakage current. In harsh natural environments, leakage currents exceeding 300mA for more than 2 hours are likely to destroy the insulation, cause a short circuit in the connection, and cause a fire accident.