Low-voltage intelligent circuit breaker with plastic shell

Abstract

The invention relates to a low-voltage intelligent circuit breaker with a plastic shell. The low-voltage intelligent circuit breaker comprises a switch base and a switch cover, wherein the switch base is provided with four longitudinal through grooves and a transverse through groove penetrating through the longitudinal through grooves, a vacuum electromagnetic switch, a current transformer and a storage capacitor are sequentially installed in three longitudinal through grooves; another vacuum electromagnetic switch and another storage capacitor are sequentially installed in the other longitudinal through grooves, and a zero sequence transformer is installed in the transverse through groove; and a control circuit board is fixed at the upper middle of the switch base, a power module, a charging module, a phasing voltage transformer, three voltage transformer for phase selection, two main processors and two auxiliary processors, wherein the display circuit board is located in the upper middle of the control circuit board and embedded in the switch cover and provided with a display screen, a red indication lamp, a green indication lamp, a switching-in operation button, a switching-off operation button and the like. The invention has the advantages of small volume, compact structure, convenience for use and installation and capability of truly realizing comprehensive intelligence of digital protection, automatic control and communication function.

Description

technical field [0001] The invention relates to a switchgear for low-voltage intelligent control, especially a low-voltage switchgear with functions of digital protection, automatic control, remote communication and phase-separated cutoff of fault current, belonging to the field of low-voltage electrical equipment. Background technique [0002] At present, our country has proposed the concept of developing an intelligent grid, which also includes the intelligence of the low-voltage distribution grid, and the most important part of the intelligence of the low-voltage grid is the intelligence of the low-voltage circuit breaker. Intelligent low-voltage circuit breakers must have the functions of comprehensive protection, automatic control, remote communication and phase-separated cutting off fault current at the same time. At present, our country is moving in this direction. Major professional low-voltage electrical appliance manufacturers and scientific research institutes hav...

AI Technical Summary

Problems solved by technology

[0004] 1. The existing circuit breakers do not have the four basic elements of intelligence, which are comprehensive and reliable information perception capabilities; high-speed and powerful data processing capabilities; efficient and sensitive operation execution capabilities; reliable and stable remote communication capabilities

[0005] 2. The various protection functions of the existing circuit breaker are completed by the corresponding electromagnetic release, which has complex structure, low efficiency and poor reliability

[0006] 3. The operation mode is mechanical, without considering the integration of the release and high-efficiency arc extinguishing, without considering the digital control of various releases, and without considering the integration of the release and the operating mechanism

[0007] 4. Although the existing circuit breaker has realized the free setting of part of the protection fixed value and the free setting of the protection switching and withdrawing, it can only be set mechanically on the spot

[0008] 5. When an abnormality or fault trips, the alarm information such as sound, light, and text cannot be issued in time

[0009] 6. Cannot be self-organized and whether the online monitoring is in good condition

[0010] 7. The control method is local. Most circuit breakers can only manually control the opening and closing of the circuit breaker on site. They do not have remote or remote control functions. Exchange of information is extremely limited

[0012] 9. All circuit breakers are multi-pole linkage operating mechanisms, which do not have the functions of phase selection, phase setting, opening and closing operations

Images