Low-voltage power capacitor

Abstract

The invention provides a low-voltage power capacitor. The shell is internally provided with a bracket used for installing a capacitor core set. Insulating gas is inflated into the shell. The capacitorcore set is divided into at least two layers of laminated capacitor core bars. A terminal module, a current transformer connected with the current temperature signal integrated terminal module and used for detecting the internal current signal of the power capacitor and a temperature sensor used for detecting the internal temperature signal of the power capacitor are integrated on the capacitor upper cover. A three-phase power supply terminal module is arranged on the upper cover. The three-phase power supply terminal module and the current temperature signal integrated terminal module are respectively provided with a power connecting terminal. Corrugated silencers are arranged between the capacitor core bars and the capacitor shell and in the middle of the inside of the capacitor core bars. The internal temperature of the capacitor can be detected so that protection of the capacitor can be realized, heat radiation can be performed by using the gap between the internal cores and thusthe overall noise radiation level of the capacitor can be reduced.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a low-voltage power capacitor. Background technique [0002] Power capacitors, capacitors used in power systems and electrical equipment. Any two metal conductors separated by an insulating medium form a capacitor. The size of the capacitance of the capacitor is determined by its geometric size and the characteristics of the insulating medium between the two plates. When the capacitor is used under AC voltage, its reactive power is often used to represent the capacity of the capacitor, and the unit is var or kvar. Intelligent power reactive power compensation capacitors provide solutions for improving the power factor of power supply and improving the efficiency of the power grid. The main application areas are: factory power distribution system, residential quarter power distribution system, municipal commercial building, traffic tunnel power distribution system, box change...

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a low-voltage power capacitor, which solves the problems in the prior art that cannot reflect the working current of the capacitor, monitor the internal temperature, and dissipate heat and vibration