electrical power box distribution Introduction:
Circuit breaker cannot close: the closing button is in bad contact; The core of the control loop is burned out; Circuit breaker is not stored; The closing electromagnet is broken; The closing electromagnet controls the power supply voltage less than 85%. Methods: Replace the undervoltage coil; Replace the core after confirming that the control loop is normal without short circuit; Control the power supply voltage within the range of ≥ 85%; Replace the closing electromagnet.
Improper selection of electrical appliances in the electrical power box distribution box: Because at the time of manufacturing to choose is not very suitable for ac contactor capacity, for different wire loop installations with the capacity of ac contactor, without considering the unbalanced three-phase load situation, and not part of the line contactor current level on the basis of normal selection model, enhance the level of a current choice, resulting in high temperature in summer season when running ac contactor burn out. Method: The electrical components in the distribution box should be selected.
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