Motor protector with electricity meter function

Abstract

The invention relates to a motor protector with an electricity meter function. A signal processing circuit is arranged in a cuboid or cylindrical box body; the cuboid or cylindrical box body is coated by a cuboid or cylindrical shell; in addition, the cuboid or cylindrical shell is connected to a vertical plate by a connecting piece; the connecting piece comprises a suspension sheet; a suspension opening for being suspended to an expansion screw rod is formed on the periphery of the bottom end of the suspension sheet; the front side wall of the suspension sheet is provided with a pair of bending parts of which openings are upwards; and the motor protector avoids the defects that difficulty in erection between the shell and the box body is increased, the shell is usually damaged after being used in a long service cycle, and erection reliability is difficult to ensure.

Description

technical field [0001] The invention relates to the technical field of electric meters, in particular to a motor protector with the electric meter function. Background technique [0002] Three-phase motor is one of the most widely used equipment in the electromechanical industry, and it is the source of power for other electromechanical equipment. The normal output power of the motor is the prerequisite for the normal operation of the equipment it drives. Therefore, it is very necessary to design and use a protection device that can monitor motor faults in time and accurately. my country's motor protection devices have developed from mechanical bimetallic thermal relays to electronic protection relays. Today, with the development of microprocessor and large-scale integrated circuit technology, intelligent motor protection devices have become the mainstream. In actual use, it is usually necessary to record the electrical energy of the motor, so a watt-hour meter is often in...

AI Technical Summary

Problems solved by technology

[0004] In actual application, the signal processing circuit is often arranged in a cuboid or cylindrical box, and the cuboid or cylindrical box is wrapped by a cuboid or cylindrical shell, and the current package The shell of the box body is often installed on a vertical plate, but the existing shell is only provided with a pair of thread holes, and the shell is erected directly through the combination of the thread holes and the tensioning screw rod of the vertical plate. Opened on the surface of the shell, it is also because the shell simply relies on the surface of the shell to bear gravity, but most of the gravity of the shell is the cuboid or cylindrical box inside, thus allowing the erection between the shell and the box The difficulty is increased, the shell is often damaged after the service life of the shell is not short, and the reliability of the erection is difficult to be guaranteed

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