Intelligent integrated power capacitor is also called intelligent capacitor, and intelligent capacitor is composed of CPU measurement and control unit, three-phase synchronization of machinery, protection device and self-healing capacitor. Intelligent capacitor intelligence is mainly reflected in the over-zero switching, protection control, and fault self-diagnosis. Zero-throw function by the core device intelligent zero-throw relay to achieve zero voltage throw, zero current cut, reduce power consumption, in addition to the capacitor has over-voltage under-voltage, loss of voltage protection, short-circuit over-temperature protection. Intelligent capacitors also have the advantage of self-diagnosis of faults, by monitoring the capacitor internal zero-throw switch, circuit breakers, capacitors and other parts of the operating conditions, and real-time prompts in the display, to facilitate staff monitoring and maintenance.