DC contactor with electric energy detection function

Abstract

The invention discloses a DC contactor with an electric energy detection function. The DC contactor comprises a DC contactor body (6), and also comprises a shunt sampling resistor (8), wherein the shunt sampling resistor (8) is directly fixed on an input electrode (1) or an output electrode (4) of the direct current contactor body (6), and shunt sampling output points are respectively arranged attwo ends of the shunt sampling resistor (8). According to the invention, the shunt sampling resistor is directly welded on the electrode of the DC contactor; when the DC contactor is closed, currentsof different magnitudes flow through the shunt sampling resistor through the electrodes of the DC contactor, a tiny voltage change is formed on the shunt sampling resistor, and electric energy consumed by a load can be obtained by calculating the changed voltage. According to the invention, the shunt is integrated on the electrode of the DC contactor, so that the on-off of a power supply can be controlled, the electric energy can be detected, the occupied space of a product is not increased, and possible fault points are not increased.

Description

technical field [0001] The invention relates to the technical field of DC contactors, in particular to a DC contactor with electric energy detection function. Background technique [0002] In the communication DC power supply system, DC contactors are usually used to control the power supply of different loads and the charging and discharging of batteries. At the same time, shunts are also needed to detect the electric energy of loads or batteries. The traditional method is at the input end of the contactor (or output terminal) in series with a shunt, and calculate the actual amount of electric energy used by detecting the small voltage change at both ends of the sampling point. Because the current of communication DC power supply is relatively large, DC contactors and shunts are generally connected by copper bars, which not only increases the space occupied, but also increases the difficulty and workload of assembly, and increases the number of electrical connections. This...

AI Technical Summary

Problems solved by technology

Because the current of communication DC power supply is relatively large, DC contactors and shunts are generally connected by copper bars, which not only increases the occupied space, increases the difficulty and workload of assembly, but also increases the electrical connection points to increase This is mainly because if the connection between the copper bars is not tightened tightly, the flatness of the surface of the copper bars will be inconsistent, which will cause serious faults such as circuit ignition and arcing.

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